Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
47 results about "RETENTION WATER" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Processing system of aqueous solution containing concentrating easy-to-scaling ions and processing method thereof
ActiveCN105502756AImprove solubilityIncrease concentrationWater contaminantsWater/sewage treatment with mechanical oscillationsSolubilityWater storage tank
The invention provides a processing system of an aqueous solution and its processing method. The system comprises water storage tank, a pretreatment device, a nanofiltration device, a separation permeable water tank, a separation retention water tank and an electrodialysis device. The electrodialysis device comprises a pole compartment tank, a rearrangement water tank, an electrodialyzer and a DC power supply. The electrodialyzer comprises an anode plate, a cathode plate, a cation exchange membrane, an anion exchange membrane, a separator plate, a separation retention water compartment, a separation permeable water compartment, a rearrangement water tank, an anode compartment and a cathode compartment. The invention brings forward an ion separation and rearrangement technology. By the rearrangement effect of electrodialysis, cation in separation permeable water obtained after nanofiltration and anion in the separation retention water are combined into a new salt, and anion in separation permeable water obtained after nanofiltration and cation in separation retention water are combined into another salt. Thus, various ions in the easy-to-scaling solution are separated and combined into salt with high solubility. Concentration multiple of salt is raised, and scaling is prevented. Life of the membrane and equipment is greatly prolonged, and water recovery rate and concentration of concentrated water are greatly enhanced.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
Method for preparing cefmetazole sodium
The invention relates to a method for preparing cefmetazole sodium, which comprises the following steps: (1) dissolving sodium hydroxide in water, adding mercaptoacetic acid and chloroacetonitrile into the mixture to perform the reaction, then adding sodium chloride and ethyl acetate into the reaction solution, stirring and dissolving the mixture, standing to separate phases and reserving a solvent phase for later use; (2) dissolving 7-MAC in methylene dichloride, adding organic base and side-chain solution into the mixture, stirring the mixed solution to perform the reaction to carry out phase separation, removing a water phase and carrying out secondary phase separation on the solvent phase to obtain cefmetazole benzyl ester; (3) dissolving ferric trichloride in aether, adding methylene dichloride in the mixture, dropwise adding the obtained product into cefmetazole acid to perform the reaction for 0.5 to 1 hour, then carrying out phase separation, removing the water phase, carrying out back extraction of alkali liquor on the solvent phase, then reserving the water phase, adding seed crystals, stirring the product and carrying out crystallization to obtain cefmetazole acid; and (4) dissolving the cefmetazole acid in alkali water and freezing out the mixture to obtain cefmetazole sodium. The preparation method of the invention has the advantages of 58 to 62 percent of yield, low cost, environment-friendly property, 92 percent of product purity, suitability for industrial production and the like.
Owner:哈药集团股份有限公司 +1
Method for automatically controlling the level of dissolved oxygen in water based on a pressure tank system equipped with sterilizer
InactiveUS6638434B2Water treatment parameter controlWater/sewage treatment by irradiationWater basedAutomatic control
A method for automatically controlling the level of dissolved oxygen in water, including the stops of mixing air or oxygen and nitrogen gas so as to be dissolved in retained water in a closed tank. The retained water is circulated by a pressure pump, activated by a ceramic pipe and an infrared ray irradiation device and then injected into the water in the closed tank. The mixing ratio of the air or oxygen and nitrogen gas mixed with to retained water is adjusted, the pressure in the pressure tank is changed, and the injecting pressure of the gas injection nozzle is changed. Sludge or the like is removed from the water by filtering, the oxidation-reduction potential of the water is adjusted to a desired level, and the water is sterilized by an ultraviolet ray irradiation device and brought back to the closed tank.
Owner:MIKASA SPORTS
Fuel Cell
ActiveUS20090023029A1Stable air supplyImprove propertiesCell electrodesFuel cell auxillariesFuel cellsEngineering
In a fuel cell composed of a pair of separators with a membrane electrode assembly sandwiched therebetween, gas passages having a plurality of generally linear passage portions, and bent passage portions each of which makes one end portion of the linear passage portions communicated with the other end portion of the linear passage portions, are formed so as to be communicative from a gas introducing port to a discharge port. In inner wall surfaces of the groove portions of the separators constituting the linear passage portions, water-retaining groove portions capable of retaining inside thereof at least part of water generated in the gas passage are formed in such a grooved configuration as to be substantially continuous along the passage portion. As a water drop generated within the gas passage makes contact with retained water within the water-retaining groove portions, growth of the water drop is suppressed to avoid any blockage of the gas passage, by which the anti-flooding property is improved.
Owner:PANASONIC CORP
Portable water travel bottle for use to provide water to dogs in automobiles and other locations remote from home
ActiveUS20160050884A1Safe storageEasy accessAnimal watering devicesDrinking strawCanis lupus familiaris
A portable travel mug and water bowl combination which is used to retain water and dispense water for a dog to consume and thereafter enable the unconsumed water to be returned to the travel mug. The water bottle contains an upper section, a lower section and an interior recessed section which enables the bottle to be compressed to squeeze water out of the bottle through a straw into the dog bowl and at the same time provide a sufficient stiffness so that the shape of the bottle will not deform. The water bottle is designed to be fit into and retained in a standard car beverage container holder. The device is also designed to be aesthetically pleasing so that it can even be used in luxury vehicles.
Owner:ROSS GARY
Method for cage culture of frogs
The invention discloses a method for cage culture of frogs, particularly a method for artificially breeding frogs in a sealed pond, which is disinfected at fixed period, by utilizing cages. The method comprises the steps of selecting parent frogs, spawning, cultivating tadpoles, and breeding young and adult frogs, and is characterized by comprising the steps of: (1) selecting parent frogs: selecting healthy and strong parent frogs which are cultivated for 2-5 years, and breeding in a 20-30 DEG C constant-temperature humidity-retention water tank; (2) spawning: placing male and female frogs in the tank at a ratio of 1:(0.5-1), mating, spawning, and transferring out the parent frogs after spawning; (3) cultivating tadpoles: breeding incubated tadpoles in small-pore cages in the pond, and feeding with tadpole powder until the tadpole tails break; and (4) breeding adult frogs: transferring the tadpoles of which the tails break to the cages in which foam boards and wood board are placed, feeding with frog feed, and harvesting until each frog is 0.25-0.5kg. The method has the advantages that the operation is simple and convenient, the water pollution is reduced, the survival rate of the frogs is improved, the insect pests are effectively removed and microorganisms are not destroyed, and the water, manpower and expense are saved.
Owner:蒙有恳
Low pressure water-heating solar panel apparatus and method
InactiveUS20090255528A1ResistanceLow-profileSolar heating energySolar heat devicesEngineeringRETENTION WATER
An improved low-pressure, water-heating solar panel provides easier and safer initial installation because it is more resistant to damage by workmen during that installation. Further, after installation, the solar panel is more resistant to damage by high winds because it has a low profile and does not present a gap or space into which high winds can intrude to lift, flap, and damage the solar panel. Also, during freezing weather the improved solar panel is not damaged by freezing of retained water due to its novel internal construction which allows all water to completely drain from the solar panel and prevents any puddling of retained water. Methods of manufacturing the improved solar panel are disclosed.
Owner:THERMOCRAFT INDS
Yard hydrant with drain port air line
A yard hydrant that facilitates the evacuation of water from therein. The wall hydrant has a standpipe having a drain port wherein the standpipe is coupled to a head casing that has a discharge conduit. An air line is mounted adjacent and to the drain port and extends from the drain port to an end that may be attached to a pressurized fluid source. Thus, when water remains in the standpipe even after a closure valve is closed, pressurized air is supplied through the air line and drain port into the standpipe to force retained water toward and out of the discharge conduit.
Owner:WCM IND INC
High-color-retention water-based paint and preparation method thereof
InactiveCN109294347ARetains chemical resistanceImprove high temperature resistanceFireproof paintsAnti-corrosive paintsWeather resistanceEmulsion
The invention discloses a high-color-retention water-based paint and a preparation method thereof. The high-color-retention water-based paint comprises high-color-retention water-based paint of a latex paint system and / or high-color-retention water-based paint of an inorganic paint system. The preparation method comprises the following steps: adding raw materials of the high-color-retention water-based paint of the latex paint system and / or raw materials of the high-color-retention water-based paint of the inorganic paint system inorganic paint system into a stirrer in batches, adding water, carrying out stirring, finally adding a polyvinylenedifluoride emulsion and pigment color paste for color adjustment, adding a defoaming agent, and carrying out stirring to obtain a finished product. The high-color-retention water-based paint provided by the invention has the characteristics of high weather resistance and color retention, so that the finally prepared paint has good color retention.Weather resistance and chemical corrosion resistance of the paint can also be enhanced, and particularly, the defects that an existing latex-paint exterior wall paint material is poor in weather resistance and fades easily are overcome. The high-color-retention water-based paint is an ideal selection of bright wall marks for religious temples, kindergartens, outdoor advertisements and the like. The application range is wide, maintenance is easy, and cost performance is high.
Owner:陈威
Fire protection containers incorporating novel low free-water insulation materials
InactiveUS6841209B2Reduce setup timeEffective water retentionFurnace componentsLayered productsCelluloseChemistry
The present invention contemplates water-bearing silicate materials achieved by modifying the basic method of essentially reacting water glass with calcium chloride to bind the free water into solid form without adversely affecting the basic chemical and physical structure of the original product. The material is then dried by using a physical wicking agent, such as a cellulose sponge, adding an anhydrous salt to the material to form a crystalline hydrate, or adding calcium oxide or calcium hydroxide to the material to form a microstructure that physically retains the water. The material is then incorporated into a fire protection container in which the material forms the outermost wall of the container, a light-weight porous material such as urethane foam an intermediate layer, and a phase change material with a melting point of around 70 degrees F. to 125 degrees F. forms the innermost wall.
Owner:FIRE KING INT
Long-acting totally-closed water seal type odor-resistant same-floor drainage floor drain
InactiveCN103643726AWater seal for a long timeLong-lasting anti-odor and anti-insect effectSewerage structuresDomestic plumbingStructural engineeringEnvironmental engineering
The invention discloses a long-acting totally-closed water seal type odor-resistant same-floor drainage floor drain which comprises a same-floor floor drain main body, a floor drain grate and a water seal structure, wherein at least one pipeline joint is arranged on a side wall of the floor drain main body; the water seal structure is a water seal which is formed by a water seal outer sleeve and a water seal inner sleeve in a sleeving manner and has a vertical section shaped like a Chinese character shan; a protective floater with an air cavity is additionally arranged in a space between the lower end of the water seal inner sleeve and the bottom surface of the floor drain main body; a main body of the protective floater is a disc-shaped surface matched with an inner cavity of the water seal outer sleeve in inner diameter; multiple balance holes are formed in an area, which is close to the edge, on the disc-shaped surface along the periphery; the air cavity is raised in the water seal inner sleeve; the protective floater floats to an edge at the lower end of the water seal inner sleeve so as to close the lower end of the water seal inner sleeve; meanwhile, an annular water seal panel is arranged above the water seal outer sleeve and is arranged on the water seal inner sleeve in the sleeved manner; the annular water seal panel can be tightly contacted with the top end of the water seal outer sleeve; the upper end of a vertical water channel is closed; the water seal panel and the protective floater form a double-seal ring together, so that a water body in the water seal is remained for a long time, and the aim of water seal for a long time is achieved.
Owner:谢水清
Fuel cell having a separator with water-retaining groove portions
ActiveUS7659024B2Improve propertiesInhibit growthCell electrodesFuel cell auxillariesFuel cellsEngineering
Owner:PANASONIC CORP
Desalination method using filter press
ActiveUS20110186417A1Strong absorption capacityEliminate needSludge treatment by de-watering/drying/thickeningGeneral water supply conservationWater desalinationParallel plate
A method of water desalination in a filter press may comprise: providing a plurality of beads in a chamber between two filter plates in the filter press, the chamber being lined by filter cloths; pumping water into the chamber; heating the water in the chamber; and collecting water vapor generated by the heating. Furthermore, during the heating, the chamber may be vacuum pumped to facilitate removal of water vapor. A filter press system for water desalination may comprise: a frame; a plurality of filter plates configured to form a stack of parallel plates, each of the plurality of filter plates being movably attached to the frame, the plurality of filter plates further being configured to form a multiplicity of chambers, each of the multiplicity of chambers being formed by adjacent filter plates of the plurality of filter plates, each of the multiplicity of chambers being lined by filter cloths, wherein the plurality of filter plates, the multiplicity of chambers and the filter cloths are configured to allow water vapor to escape from the chambers while retaining salts from the water to form a filter cake; a heater, for heating the water in the multiplicity of chambers; a condenser for condensing the water vapor; and a separator for separating the beads from the filter cake after the filter cake is released from the chambers. The beads may be reused in the chambers of the filter press.
Owner:SIMPSON DANIEL J
Device for humidification of textile electrode
Owner:波尓瑟兰尼提公司
Cooling system for a small watercraft
InactiveUS6875070B2Prevents accumulated cooling water from remaining in a water channelCorrosion or freezing in the water channel may be significantly preventedLiquid coolingPower plants using condensersWatercraftEngineering
A cooling system is provided for a small watercraft which can prevent corrosion or freezing in a water channel. Water outside the watercraft is fed through a pump 30 and piping P1 or the like to a engine in the watercraft and cools the same, and then is drained from the watercraft. Drain hoses DH1 to 3 are connected to portions of the engine and piping where water tends to remain, and drain ports DH1a to 3a, which are capable of being opened and closed, are provided at the other ends of the drain hose. A single drain valve DV is provided at the drain port for opening and closing the drain hose.
Owner:HONDA MOTOR CO LTD
Clean Air Toilet System-Tank "C.A.T.S-Tank"
InactiveUS20050217007A1Less electricityPromote resultsLavatory sanitoryToilet flushingStandard function
The innovative concept is: “Clean Air Toilet System Tank” or “C.A.T.S-Tank”. The Toilet Tank has dual function: exhausting the Odorous Air directly from the Toilet Bowl, (novel function) and retaining the water for the Toilet Flushing System (standard function). The Tank has two separate compartments: One for Air and one for Water. The Air Compartment is equipped with two Ducts connecting the Air Grille, (mounted on the front bottom of the Tank), with two Back Openings (provided on the back of the Tank). The two Back Openings are connected through duct runs with the existing Exhaust Fan (above ceiling) as part of bathroom Ventilation System. To increase the efficiency of “C.A.T.S-Tank” Air Tight Insulation is provided on the Toilet Bowl rim. The “C.A.T.S-Tank” will be part of the bathroom Ventilation System and in the same time remains part of the Plumbing System.
Owner:HANCIULESCO BARBU HORIA
Reactor core melt capturing apparatus capable of realizing reinforced cooling through split charging
ActiveCN108053895AEfficient captureCompact layoutNuclear energy generationEmergency protection arrangementsCore catcherCrucible
The invention relates to a reactor core melt capturing apparatus capable of realizing reinforced cooling through split charging, belonging to the technical field of nuclear safety control. The reactorcore melt capturing apparatus comprises a reactor pit, a reactor pressure vessel, a melt retention container, crucibles, a retention water tank, a cooling water tank and connecting pipelines, whereinthe melt retention container with an opened top is located in the reactor pit; the lower part and the bottom of the reactor pressure vessel are located in the melt retention container; space, locatedbelow the melt retention container, in the reaction pit forms cooling space; the crucibles are arranged in the reaction pit and located below the base plate of the melt retention container; the retention water tank is located out of the reaction pit and connected with the reaction pit via one connecting pipeline; and the cooling water tank is located out of the reaction pit and connected with thecooling space via another connecting pipeline. The reactor core melt capturing apparatus provided by the invention can cope with serious accidents in a nuclear power station by employing compactly arranged core catchers with high cooling efficiency and realizing effective capturing and accommodating of core melts through temporary retention and reinforced cooling via split charging.
Owner:CHINA NUCLEAR POWER ENG CO LTD
Mountainous city heavy-gradient road runoff pollution control step permeation system
InactiveCN104973691AReduce runoffImprove runoff water qualityBiological water/sewage treatmentFiltrationSurface runoff
The invention relates to a mountainous city heavy-gradient road runoff pollution control step permeation system. The cascade permeation system mainly comprises road shoulder girdle laminar flow feedwater, a vegetation filtering area, a retention permeation area, a step weir and an overflow discharge facility, wherein the retention permeation area comprises a retention water space, a plant layer, a planting substrate layer, a filtration layer and a water storage layer. Overload runoffs generated from a city road are distributed and discharged into the vegetation filtering area through a road shoulder girdle; the overload runoffs are precipitated and filtered in the vegetation filtering area and then converged to the retention permeation area; in the process that the overload runoffs permeate downwards, pollutants are removed through precipitation, substrate filtration and adsorption; a broken stone water storage and discharge layer at the bottom of the retention permeation area temporarily contains the overload runoff so as to provide time for overload runoff to further permeate into deep soil, and excess overload runoff is discharged through arrangement of a tapping water collection and discharge pipe in the broken stone layer. The step permeation system has retention and permeation effect on road overload runoff and bears overload runoff discharge function; due to arrangement of the step wire, the system can be applied to an area having gradient of 10% and is suitable for treatment of mountainous city heavy-gradient road runoffs.
Owner:RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
Electrolyzed water generation apparatus
The present invention provides an electrolyzed water generation apparatus. The retention water in an electrolysis tank is not used for generating alkaline ionized water, and clean alkaline ionized water can be generated. After the alkaline ionized water is generated and processed, a control (15) closes a pump (5), closes a water feeding path open and close valve (6), closes a water discharging path open and close valve, and stops the raw water feeding to the electrolysis tank (3). Furthermore, the water discharging from a cathode chamber (3a) to a water storing part (1) is stopped for entering a natural water discharging state based on the gravity of the retention water residual in the electrolysis tank (3). Furthermore a controller (15) provides a negative voltage to the electrolysis tank (3) at the natural water discharging state. Through the negative voltage, the cathode plate (13) becomes positive potential relatively to an anode plate (14). The water scale which adheres to the cathode plate (13) and contains calcium content or magnesium content is dissolved when the alkaline water is generated, and is discharged together with the retention water.
Owner:PANASONIC CORP
Method for automatically controlling the level of dissolved oxygen in water based on a pressure tank system equipped with sterilizer
InactiveUS20020070176A1Water treatment parameter controlWater/sewage treatment by irradiationWater basedAutomatic control
A method for automatically controlling the level of dissolved oxygen in water, comprising the steps of mixing air or oxygen and nitrogen gas and so as to be dissolved in retained water in a closed type tank. The retained water is circulated by a pressure pump, activated by a ceramic pipe and an infrared ray irradiation device and then injected into the water in the closed type tank. The mixing ratio of the air or oxygen and nitrogen gas mixed with the retained water is adjusted, and the pressure in the pressure tank is changed, and the injecting pressure of the gas injection nozzle is changed. Sludge or the like are removed from the water by filtering, the oxidation-reduction potential of the water is adjusted to a desired level, the water is sterilized by an ultraviolet ray irradiation device, and brought back to the closed type tank; and the retained water in the closed type tank is taken out.
Owner:MIKASA SPORTS
Fire protection containers incorporating novel low free water insulation materials
InactiveUS7459190B2Reduce setup timeEfficient retentionFurnace componentsLayered productsCelluloseChemistry
The present invention contemplates water-bearing silicate materials achieved by modifying the basic method of essentially reacting water glass with calcium chloride to bind the free water into solid form without adversely affecting the basic chemical and physical structure of the original product. The material is then dried by using a wicking agent, such as cellulose sponge, adding an anhydrous salt to the material to form a crystalline hydrate, or adding calcium oxide or calcium hydroxide to the material to form a microstructure that physically retains the water. The material is then incorporated into a fire protection contained in which the material forms the outermost wall of the container, a light-weight porous material such as urethane foam and intermediate layer, and a phase change material with a melting point of about 70 degrees F. to 125 degrees F. forms the innermost wall.
Owner:FIRE KING INT
Two-dimensional soil moisture motion parameter estimation method under ponding infiltration condition
ActiveCN112446135ASure easyEarth material testingDesign optimisation/simulationSoil scienceSuction stress
The invention discloses a method for estimating a two-dimensional soil moisture motion parameter under a ponding infiltration condition. The method comprises a step of estimating soil moisture motionparameters alpha, n and Ks, wherein alpha is a parameter related to air intake suction hd, n is a shape parameter, and Ks is saturated water conductivity, specifically, the estimation is performed according to a formula shown in the specification, k is a proportionality coefficient of the horizontal wetting front distance xf and the vertical wetting front distance zf; N is a shape coefficient; [theta]s is the saturated water content, [theta]r represents the retention water content, hd is the air inlet suction force, n is the shape parameter, and A3 is the power function coefficient of the fitting expression of the horizontal wetting sharp distance xf and the time t. According to the invention, the problems of complexity of a parameter estimation method, time consumption of a large number of tests and consumption of manpower and material resources in the prior art are solved.
Owner:XIAN UNIV OF TECH
Traditional Chinese medicine composition for treating damp-heat and obstruction type edema
InactiveCN107349378AAchieve remissionAchieve the purpose of healingBlood disorderGnetophyta medical ingredientsSide effectFeces
The invention relates to a traditional Chinese medicine composition for treating damp-heat and obstruction type edema. According to the technical scheme, the traditional Chinese medicine composition is prepared from 10-30 parts of apocynum venetum, 1-10 parts of ephedra, 5-15 parts of phryma leptostachya, 15-30 parts of amomum villosum, 10-20 parts of amomum cardamomum, 10-30 parts of liquorice and 10-30 parts of Songluo tea. The traditional Chinese medicine composition aims at relieving symptoms of damp-heat blocking and spleen and stomach damage which are caused by having an improper diet and eating sweet and grease food for a long time, or symptoms of insufficiency and dysfunction of the spleen in transportation, water-dampness blooking and stagnation of the spleen and the edema which are caused by malnutrition and nourishment loss of spleen qi; the traditional Chinese medicine composition has the effects of inducing diuresis to alleviate the edema, relieving exterior syndrome by diaphoresis, eliminating dampness and activating qi, clearing away heat and toxic materials, and removing retention water in the body in an assistant mode of dispersing the lung, invigorating the spleen, inducing diuresis and facilitating feces excretion, and therefore the purposes of relieving and curing the edema are achieved. The traditional Chinese medicine composition is a pure Chinese medicine preparation, does not contain chemical components, hormones and side effects, and is convenient to take, easy to absorb, quick in effect and low in prices. It is proved by clinical application and observation that the traditional Chinese medicine composition has the advantages of high efficiency and long-acting effect.
Owner:洛阳士雄聚元医疗集团股份有限公司
A constant temperature and constant pressure hot water control device for emptying cold water and its control method
InactiveCN106595062BOvercome the problem of unstable water temperature and water volumeThe problem of unstable water temperature and water volume is convenientFluid heatersWater storage tankEngineering
Owner:XIHUA UNIV
Electrolyzed water generation apparatus
Owner:PANASONIC CORP
Preparation method of high-purity pitavastatin calcium
ActiveCN105198807ALow content of lactone (Formula II)Quality improvementOrganic chemistryPhysical chemistryPitavastatin calcium
The invention relates to a preparation method of high-purity pitavastatin calcium. The technical scheme adopted by the invention is characterized by comprising the following steps of step one, preparing a crude product: dissolving a material IV by using a mixed solvent of ethanol water, adding concentrated hydrochloric acid, adding excessive sodium hydroxide solution after the reaction is ended, hydrolyzing at the room temperature, reducing pressure and distilling out ethanol in a system after the reaction is ended, adding dichloromethane, extracting, retaining a water layer, adjusting the PH value of the water layer to be 8-10 by using hydrochloric acid, carrying out nitrogen protection, dropwise adding a calcium acetate aqueous solution, filtering, washing and drying to obtain the crude product of pitavastatin calcium; and step two, refining: dissolving the crude product by using the 90%-95% mixed solvent of ethanol water, filtering, slowly adding a low-polarity solvent into the filtrate under the nitrogen protection, stirring, filtering and drying to obtain a fine product of pitavastatin calcium. Through the implementation of the technical scheme, the pitavastatin calcium product, in which the content of inner ester which is expressed as the formula II is smaller than 0.02%, can be obtained; the high-quality raw medicine can be provided for clinic application.
Owner:迪嘉药业集团股份有限公司
Continous liquefying system for plastic treatment
InactiveUS20220089830A1Efficient and economicalImprove efficiencyProductsReagentsThermoformingPlastic materials
A continuous liquefying system for thermochemical treatment of plastic that has two different devices and complements. The devices comprise a first device, a second device, and a coupling device. In the first device, filled with water, the plastic is feed using a screw in a first port. The first device is used as a water airlock. The plastic is extracted from the first device using the coupling device having a screw, and is sent to the second device. From the first device to the second device there is a lateral screen, responsible for the retention of water. The second device has tubes filled with a heating fluid, that actuates heating the plastic material. The plastic material is liquefied and could be sent to other applications, such as thermochemical processes, thermoforming, and others.
Owner:VALGROUP SA
Experimental device and experimental method for measuring drainage performance of porous asphalt mixture
InactiveCN110530776AObjective evaluation of drainageSimple structurePermeability/surface area analysisExperimental methodsWater discharge
The invention discloses an experimental device and an experimental method for measuring the drainage performance of a porous asphalt mixture. A simulating rainfall condition is simulated by utilizingan experimental device, and the anisotropy of a seepage process in a test piece is characterized by utilizing a drainage anisotropy coefficient by measuring water discharge amounts of the porous asphalt mixture test piece in transverse and longitudinal section directions under different rainfall intensities based on a hydraulics theory. The maximum water discharge amount under the condition that no accumulated water exists on a surface is obtained by adjusting the rainfall intensities. A retention water amount in the test piece is obtained by testing the mass change of the test piece before and after an experiment, and semi-connected gaps in the test piece are quantified. The evaluation of the water discharge performance of the porous asphalt mixture test piece is realized by adopting indexes such as the drainage anisotropy coefficient, the maximum water discharge under the condition of no accumulated water and the semi-connected gas ratio in the test piece and the like. According to the invention, a standard asphalt mixture test piece formed indoors or sampled on site can be used for testing, and the water discharge performance of the porous asphalt mixture test piece under different rainfall conditions can be objectively evaluated.
Owner:SOUTHEAST UNIV
Device and method for water test system
InactiveCN110865073AReduce weightMaterial analysis by observing effect on chemical indicatorEnvironmental engineeringSodium carbamate
A water test system has a water sample container adapted to hold a water sample, a color indicator container adapted to dispense a color indicator that is adapted to change the color of the water sample when the water sample contains DTC, and a colorimeter suitable for A, wherein the blank value and concentration of sodium dimethyldithiocarbamate are determined in water. A method for measuring DTCconcentration in a water sample comprises the following steps of providing the water test system, placing the water sample in the water sample container, placing the water sample container in the colorimeter, automatically determining a blank value, adding the color indicator to the colorimeter, placing the water sample and the water sample container into the colorimeter, and automatically measuring the DTC concentration in the water sample.
Owner:襄阳中诚检测科技有限公司
Method for preparing cefmetazole sodium
The invention relates to a method for preparing cefmetazole sodium, which comprises the following steps: (1) dissolving sodium hydroxide in water, adding mercaptoacetic acid and chloroacetonitrile into the mixture to perform the reaction, then adding sodium chloride and ethyl acetate into the reaction solution, stirring and dissolving the mixture, standing to separate phases and reserving a solvent phase for later use; (2) dissolving 7-MAC in methylene dichloride, adding organic base and side-chain solution into the mixture, stirring the mixed solution to perform the reaction to carry out phase separation, removing a water phase and carrying out secondary phase separation on the solvent phase to obtain cefmetazole benzyl ester; (3) dissolving ferric trichloride in aether, adding methylenedichloride in the mixture, dropwise adding the obtained product into cefmetazole acid to perform the reaction for 0.5 to 1 hour, then carrying out phase separation, removing the water phase, carryingout back extraction of alkali liquor on the solvent phase, then reserving the water phase, adding seed crystals, stirring the product and carrying out crystallization to obtain cefmetazole acid; and (4) dissolving the cefmetazole acid in alkali water and freezing out the mixture to obtain cefmetazole sodium. The preparation method of the invention has the advantages of 58 to 62 percent of yield, low cost, environment-friendly property, 92 percent of product purity, suitability for industrial production and the like.
Owner:哈药集团股份有限公司 +1
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com