308results about How to "Operating conditions are easy to control" patented technology

The invention relates to a mango preserving technology. In order to achieve integrative pre-plucking and post-plucking preserving effect, the invention comprises four composite preserving pretreatment measures of disinfectant and calcium fertilizer spraying before mango plucking and heat treatment, rot-proof film-coating preservative treatment and ethylene inhibitor treatment after the plucking. The rot-proof film-coating preservative comprises 0.25 percent to 2 percent of glucomannan or / and 0.25 to 2 percent of CTS with 95 percent degree of deacetylation, 0.1 to 1 percent of sucrose fatty acid ester or / and 0.1 to 1 percent of glycerel monostearte, 0.1 to 0.5 percent sorbitol or glycerol, 0.5 to 1.5 percent of calcium chloride or calcium citrate, 0.05 to 0.1 percent of potassium sorbate, 0.01 to 0.1 percent of one or more of the following ingredients: iprodione, Sportak and mancozeb, 0.005 to 0.01 percent of gibberellin and 0.025 to 0.05 percent of vitamin K. The invention can decrease the respiratory intensity, postpone the respiratory climacterics, delay the postripeness time and prolong the freshness period of mangos. Compared with the prior art, the freshness period of the mangos can be prolonged by 10 to 20 days.

The invention discloses a probe reagent for concurrent selection and determination of multiple metal ions, and preparation and appliance, and belongs to the field of organic synthesis and analytical chemistry. Tri (2-aminoethyl) amine serves as a parent, wherein rhodamine B is connected to an amino chain, 2-hydroxy-1-naphthaldehyde groups are connected to other two amino chains respectively, and thus a tripod structured rhodamine-hydroxyl naphthalene derivative probe is prepared. In 1,4-dioxane / water (19 / 1, v / v, pH=7) solution, the probe respectively detects Cu2+, Co2+ and Fe3+ by utilizing rate absorption of different wavelengths, and the detection does not interfere with each other; in acetonitrile / water (19 / 1, v / v) solution, fluorescence emission of different wavelengths under different pHs is utilized, the probe respectively detects Zn2+, Al3+, Hg2+ and Cu2+, and the detection does not interfere with each other; under an ultraviolet lamp of 365 nm, Zn2+, Al3+ and Hg2+ are detected to show blue, pink and orange red fluorescence respectively, and through -Zn2+ mixture detection by the probe, Cu2+ shows blue fluorescence vanishing. The probe structure is as follows.

The invention pertains to the technical field of medicine preparation and relates to a vibration-crushing micro-pill machine which comprises a liquid storage pot, a pill dripping system, a cooling circulation device, a micro-pill collecting machine and a control circuit, wherein the pill dripping system comprises a dropper, a jet hole, a vibration exciter and a gear pump. The dropper is connectedwith the vibration exciter by a rigid connecting rod. The lower part of the dropper is provided with one or more jet holes, the upper part of which is a liquid inlet and the lower part thereof is a nozzle. The dropper is connected with an electric valve at the lower part of the liquid storage pot by pipes on which the gear pump is arranged. The side wall of the dropper is provided with two insertion holes in which a heater and a temperature sensor respectively connected with the control circuit are arranged. The control circuit controls the make-and-break of the heater according to the detected temperature of the temperature sensor. The cooling circulation device comprises a condensation column, a stirring device, a filter, a cooling cylinder, a cooling pump and an electromagnetic pump. The vibration-crushing micro-pill machine has the advantages of chance of batch production of micro-pills, high production efficiency, simple equipment structure and convenient control.

The invention relates to a method for preparing tetraalkyl thiuram disulphide by utilizing a micro-structured reactor, which comprises the following steps: simultaneously injecting solution of raw material secondary amine and carbon disulfide into the micro-structured reactor through pumps for condensation reaction; injecting the obtained solution of N,N-dialkyl dithiocarbamate and oxyful into another micro-structured reactor for oxidation reaction; and re-crystallizing, filtering, washing and drying the reaction product to obtain the product of tetraalkyl thiuram disulphide. In the method, the operating conditions are easy to control; blockage cannot occur in the process; the operation is convenient; the product has good selectivity; and continuous safety production is realized under theconditions of no acid or alkali and no catalyst.

The invention belongs to the technical field of material preparation, and particularly relates to a synthesis method for low-temperature manganese-based compound metal oxide denitration catalysts. According to the method, a manganese salt and a salt from a cobalt salt, a ferric salt or a nickel salt are dissolved in ethylene glycol in a mixed manner; a sodium carbonate water solution is dripped at a low temperature, and coprecipitation is carried out; and coprecipitation products are washed by water, are dried, and are calcined in the air, and products can be obtained. The synthesis method provided by the invention adopts a low-temperature artificially induced crystal splitting technology, one kind of ions from cobalt ions, ferric ions and nickel ions are added, and manganese ion precipitate crystals are induced to split in the manganese ion precipitate crystal growth process. The split crystals do not agglomerate during the growing in low-temperature environment. After the crystals after splitting growth are calcined, manganese-based compound metal oxides with high specific surface area can be obtained, and the manganese-based compound metal oxides can show excellent low-temperature catalytic activity when being used for catalyzing a denitration reaction. The synthesis method has the advantages that the operation is simple, the control is easy, and raw materials can be easily obtained, so the synthesis method is suitable for large-scale production, and in addition, the environment pollution is little.

The invention belongs to the technical field of metal-organic framework materials, and relates to a method for preparing a polynary nano-cage composite material by using a zeolitic imidazolate framework as a template. The method comprises the following steps: synthesizing a ZIF-67 framework through a solvothermal technology by using methanol as a solvent, and synthesizing a hydroxide precursor from nickel nitrate and zinc nitrate by adjusting a mass ratio of the zinc nitrate to the nickel nitrate; and sequentially centrifuging, washing, drying and calcining the hydroxide precursor to obtain the nano-cage composite material. The method has the advantages of simple process, low price, easiness in control, and low cost, and the prepared product is a nano-cage composite material having a non-spherical hollow structure, and has the advantages of large specific surface area, high crystallinity, good morphology, and easiness in realization of industrialization.

The invention discloses a method for preparing polycrystalline cubic boron nitride, which comprises the following steps: using cubic boron nitride and a bonding agent as raw materials, mixing the cubic boron nitride and the bonding agent and then ball-milling the mixture, wherein the ball material ratio during the ball milling is (1-4):1, the rotating speed is between 400 and 800 revolutions per minute, and the ball milling time is between 4 and 20 hours; drying the mixed mixture after the ball milling, adding an organic binder into the mixture after drying, mixing the mixture evenly, and screening the mixture through a 100-mesh screen; performing cold compression and forming with the pressure of between 0.8 and 2 GPa; and sintering the formed green body at a sintering temperature of between 1,000 and 1,300 DEG C, and keeping the temperature for 4 to 20 hours so that the finished product is obtained after the sintering. The polycrystalline cubic boron nitride PcBN prepared by the method is gray and is a compact block which has the superior performances of high hardness, high grinding efficiency, good impact resistance toughness, easy conditioning, good grinding quality and the like. The method has the advantages of simple equipment, easily-controlled operation, low cost and easy large-scale production, has favorable social value and economic value, and is easy to popularize and apply.

The present invention is the process of producing ethylene with ethanol obtained through fermenting biomass as the material, and provides one biomass path of preparing ethylene. The present invention features the coupling of ethanol distilling process and chemically catalytic ethylene preparing process. The ethylene producing process includes: distilling 5-45 % concentration ethanol solution to obtain mixed ethanol-water vapor, heating the mixed ethanol-water vapor to 150-350 deg.c, catalytic reaction in a gas-solid reactor to obtain coarse ethanol product, cooling, gas-liquid separating to eliminate components with boiling point higher than 70 deg.c and obtain ethylene gas, and washing, drying and refining to obtain ethylene product. The ethylene producing process has low comprehensive power consumption, low cost and high marketability.

A process for extracting natural capsicine from hot pepper powder or the hot pepper extract as the by-product obtained after extracting rutilant pigment from hot pepper features that the alcohol, ethylether, acetone, petroleum ether, or ethyl acetate is used as extractant, a separation accelerator is used to prevent the generation of the third phase, a saponifying activator is used for speeding up saponifying reaction at low temp (28-35 deg.C) and a cleaner is used for stable crystallizing. Its advantages are high purity (more than 99%), and low cost.

The invention discloses a bismuth tungstate composite photocatalyst modified by a nitrogen-doped carbon quantum dot and a preparation method and application thereof. The composite photocatalyst is characterized in that bismuth tungstate is taken as a carrier, and is modified with the nitrogen-doped carbon quantum dot. The preparation method comprises the following steps: mixing bismuth nitrate, sodium tungstate and water, and stirring the mixture to obtain a bismuth tungstate precursor solution; mixing the bismuth tungstate precursor solution with a nitrogen-doped carbon quantum dot solution, and stirring the mixture to obtain a mixed solution; performing a hydrothermal reaction to obtain the bismuth tungstate composite photocatalyst. The composite photocatalyst has the advantages of environmental friendliness, high photo-induced electron-hole separating efficiency, high light absorbing efficiency, high photocatalysis activity, high photocatalysis stability and high corrosion resistance; the preparation method has the advantages of simple preparation process, low raw material cost, and easiness in controlling operation conditions. The composite photocatalyst is used for catalyzing degradation of antibiotic wastewater, and has the advantages of simple application method, high degrading efficiency and high repeatability, and has a very good practical application prospect.

The invention relates to a preparation method of a microporous-mesoporous composite zeolite. The method comprises a step that a Y zeolite precursor commonly used in present heavy oil catalytic cracking is introduced to the pore walls of the composite sieve. The composite sieve has the advantages of high hydrothermal stability, narrow pore size distribution, large mesopore size, short production period, and easily controlled operation conditions, and can be widely applied to the fields of petroleum catalytic cracking, hydrocracking and the like.

The invention relates to the field of mineral materials, in particular to a method for preparing ultrafine high-whiteness active barite powder. The method comprises the following steps of: (1) preparing pulp from 325-mesh barite powder, and performing wet ultrafine grinding until the particle size is less than 10mu m; (2) filtering the barite pulp subjected to wet ultrafine grinding, and drying; (3) adding mixed acid into the dried ultrafine barite powder, and performing oxidation leaching reaction with stirring, wherein the mixed acid is a mixed solution of sulfuric acid, hydrofluoric acid and oxalic acid; (4) filtering the barite powder subjected to oxidation leaching reaction by the mixed acid, and washing until the pH is 6 to 7; and (5) performing pressure filtration, and drying to obtain the ultrafine high-whiteness active barite powder. The preparation method is simple and controllable and easy to popularize, equipment can be localized completely, over 99 percent of prepared barite product has the particle size of -10mu m, and the whiteness is over 90 percent.

The invention discloses a resource treatment method for a sodium chloride waste salt in the process of dye production. The method comprises the steps: in an oxygen-free environment and under differenttemperature conditions, removing water in the waste salt, gasifying small-molecule organic matter, splitting aromatic ring substances, carbonizing naphthalene, anthracene and fused ring substances, then dissolving the obtained salt, removing carbonized particles so as to a purified sodium chloride solution, and performing bipolar membrane electrolysis on the obtained sodium chloride solution so as to prepare a sodium hydroxide solution and dilute hydrochloric acid. The whole treatment process is simple, efficient, economical and feasible, and meanwhile resource recovery and utilization of thesodium chloride waste salt, the split small-molecule organic matter and carbonized product are realized.

The invention discloses a silver phosphate / nitrogen-doped carbon quantum dot / bismuth vanadate Z type photocatalyst, a preparation method and application thereof. The Z type photocatalyst adopts bismuth vanadate as the carrier, and the bismuth vanadate is modified with nitrogen-doped carbon quantum dots and silver phosphate. The preparation method includes: preparation of a nitrogen-doped carbon quantum dot modified bismuth vanadium material; and mixing of the nitrogen-doped carbon quantum dot modified bismuth vanadium material with silver nitrate and disodium hydrogen phosphate dodecahydrate in water so as to obtain the Z type photocatalyst. The Z type photocatalyst provided by the invention has the advantages of high light absorption efficiency, high photoinduced electron-cavity separation efficiency, high photocatalytic activity, strong redox ability and the like, can efficiently degrade antibiotic wastewater, also has the advantages of simple application method, high degradation efficiency and good reutilization, and has good practical application prospect. The preparation method provided by the invention has the advantages of simple preparation process, easily controllable operating conditions, simple and easily available raw materials, low preparation cost and the like, and is suitable for continuous and large-scale mass production.

The invention discloses a preparation method of a graphene / stannic oxide quantum dot composite electrode material for a lithium ion battery. In the sample preparation process, that graphene-supported stannic oxide quantum dots are synthesized under relatively mild experiment conditions by utilizing a wet chemical method, and urea is adopted as a reducing agent to reduce graphite oxide, so that the preparation method has the advantages of simple and controllable reaction conditions and low production cost; by introducing graphene, not only can the conductivity of the composite material be improved but also volume change in the stannic oxide charge-discharge process can be effectively buffered; therefore the composite material shows good cycling stability.

The invention relates to a preparation method for a nano silicon dioxide modified organic silicon sealant for packaging of a light emitting diode (LED). As silane coupling agent modified nano silicon dioxide is added into chlorosilane hydrolysis and polycondensation system, the compatibility of the nano silicon dioxide and organic silicon resin is sharply improved; a small quantity of curing agent, catalyst and defoaming agent are added, the mixture is mixed uniformly and then is cured at room temperature so as to prepare the nano silicon dioxide modified organic silicon sealant. The preparation method is simple, has low cost, and can prepare a series of high refractive index and high transmittance packaging sealants for multiple LED electron components, and the operation conditions are easy to control.

The invention relates to a method for producing alumina from bauxite. The method adopts sodium hydroxide solution in high molecular ratio, can efficiently extract alumina from indissolvable-diasporite type bauxite at low temperature under the normal / low pressure, is mild in operation conditions, and has actual dissolution rate up to over 90 percent. After stripped slag-containing suspension is subjected to flash evaporation cooling to crystallize and precipitate sodium aluminate hydrate crystals, the sodium aluminate hydrate crystals are dissolved in water or dilute alkali solution and then subjected to desilication, seed precipitation and calcination so as to obtain alumina meeting the requirements of metallurgical grade. Slag is dealuminized through sodium aluminate hydrate crystallization mother liquor and then is subjected to sodium removal so as to effectively reduce the content of sodium oxide and alumina in red mud, enable the composition, alkali content and other main indexes of obtained red mud physical phase to meet the requirements of raw materials for producing cement, reduce the loss amount of alkali solution and raise the resource utilization rate of bauxite. Dealuminized stripping solution can be recycled for stripping bauxite, so that industrial operability is greatly improved.

The invention discloses a ceramic fiber filtering tube, a preparation method and a pressurization and suction forming device. The pressurization and suction forming device comprises a forming mold, apressurization pump, a dosage bunker, a vacuum pump and a vacuum filtrate tank, wherein the forming mold comprises an inner template, an upper template, a lower template, filter cloth and a blank tubecavity; the filter cloth and the blank tube cavity are arranged between the inner template and the upper template respectively; the filter cloth is arranged on the inner template; the lower templateis connected with the upper template; the upper and lower flange faces of the inner template are provided with sealing gaskets respectively; the top of the upper template is provided with a quick coupler for charging water or slurry; the quick coupler is connected with the pressurization pump; the pressurization pump is connected with the dosage bunker; the middle part of the lower template is provided with a water outlet for discharging water or slurry; the water outlet is connected with the vacuum filtrate tank; the vacuum filtrate tank is connected with the vacuum pump; a vacuum pressure gauge and a blow-off valve are arranged between the vacuum filtrate tank and the vacuum pump. The pressurization and suction forming device adopts a pressurization forming and suction sizing demolding form, is simple in structure, is convenient for forming, and is convenient to operate.

The invention provides a method for simultaneously producing dimethyl carbonate and dimethyl ether through a urea alcoholysis process, a catalyst used thereby, and a preparation method of the catalyst. The method for simultaneously producing dimethyl carbonate and dimethyl ether through a urea alcoholysis process adopts a two-stage slurry bed reactor or fixed bed reactor technology, and in the preparation process, when dimethyl carbonate and dimethyl ether are prepared from methyl carbamate and methanol in a second-stage fixed bed reactor, a multi-component composite oxide catalyst using one or more of transition metal oxides, rare earth oxides, alkali metal oxides, alkaline earth oxides, IVA group metal oxides, VA group non-metal oxides or IIIA group non-metal oxides and Al2O3 as active components is filled into the fixed bed reactor, so the methyl carbamate conversion rate is improved, and the dimethyl carbonate and dimethyl ether selectivity is substantially improved.

The invention relates to a method for synthesizing chloroaniline and particularly relates to a method and a catalyst for synthesizing chloroaniline from chloronitrobenzene by virtue of selective catalytic hydrogenation. According to the method, a supported noble metal catalyst is utilized, hydrogen serves as a hydrogen source, chloronitrobenzene is subjected to selective hydrogenation in a liquid phase system to generate chloroaniline, and the selective hydrogenation process is presented by the following formula in the specification by virtue of liquid chromatography-mass spectrometric detection. The method is high in efficiency and reaction selectivity, mild in reaction condition and low in cost, and the operation is easily controlled.

The invention discloses a new process for producing fluoride and a white carbon black coproduct by adopting fluosilicic acid or fluosilicate. A method for adding SiO2 particles in a process of hydrolyzing fluosilicate for promoting generation of SiO2 crystal nucleus reaction product is adopted, reaction temperature is reduced, reaction efficiency is improved, and a hydrolysis process is more complete. The new method for producing fluoride and white carbon black by adopting fluosilicic acid or fluosilicate provides an effective way for recycling of fluoride-containing waste water.

This invention relates to a method for preparing white carbon black with high reinforcing ability by ammoniation of fluorosilicic acid. The method comprises: (1) adding ammoniation agent (30-70% of the total amount) into fluorosilicic acid, and ammoniating at 20-65 deg.C; (2) aging the ammoniation solution, and filtering to obtain filtrate and filter cake; (3) adding the rest ammoniation agent into the filtrate, ammoniating at 20-55 deg.C, aging the ammoniation solution, filtering to obtain mother liquor and filter cake, and sending the mother liquor to the following process; (4) washing the filter cakes, and drying to obtain white carbon black. The method has a high profit, and is environmentally friendly.

The invention relates to a wrinkled graphene lamella and a making method thereof, and belongs to the graphene preparation field. The method is characterized in that laser irradiates a graphene lamella covering a polystyrene layer to obtain wrinkles. The method generating wrinkles on the graphene lamella can control the generation positions of the wrinkles, can generate wrinkles at the edges of the graphene lamella, and can also generate wrinkles in the middle position of the graphene lamella; and the method has the advantages of simple operation, and easy control of operation conditions.

The invention discloses flame-retardant wallpaper as an indoor wall decoration material and a preparation method thereof. The preparation method for the flame-retardant wallpaper includes the following steps: after being immersed in a flame retardant solvent, a decorative veneer and a wallpaper substrate (backing paper) are ultrasonically immersed, so that a flame-retardant decorative veneer and a flame-retardant substrate are obtained; the flame-retardant decorative veneer is attached onto the surface of the flame-retardant substrate. The flame-retardant property of the wallpaper is good, the potential fire risk is low when the material burns, and the flame-retarding effect is remarkable; the smoke suppression effect is obvious, the amount of CO released from smoke is obviously reduced, toxic CO gas can be partially turned into non-toxic gas, and the wallpaper has a good effect of suppressing CO released at fire scenes. Moreover, since the adopted materials are natural materials, the wallpaper is safe to use.

The invention discloses a preparation method of a super-hydrophilic anti-fogging oxidized graphene coating. The preparation method comprises the following steps: taking graphene micro powder as a raw material, adopting a wet chemical oxidation method to prepare oxidized graphene dispersion liquid, and carrying out filtration, rinsing, ultrasonic dispersion and centrifugal separation to obtain the super-hydrophilic anti-fogging oxidized graphene coating. In addition, the invention further discloses a method of adopting the coating to prepare a super-hydrophilic anti-fogging oxidized graphene coating layer. The preparation method disclosed by the invention is simple in technology, low in cost, green and environment-friendly, and easy in operating condition control. The obtained oxidized graphene coating is excellent in performance, wide in application range, and capable of being applied to relatively transparent common glass or organic transparent carrier. The prepared super-hydrophilic anti-fogging oxidized graphene coating layer has the excellent characteristics of super-hydrophilicity, anti-fogging property, high strength, long durability, high transmission of light and the like. The preparation method of the super-hydrophilic anti-fogging oxidized graphene coating effectively solves the problem that the existing coating layer is poor in anti-fogging effect and durability, and is favorable to promote application and development of the super-hydrophilic technology.

The invention provides a hyperbranched silicone oil side chain modified waterborne polyurethane polymer and a preparation method thereof. The preparation method of the polymer comprises the following steps: making 100 parts of polyether polyol and 10 parts of hyperbranched amino silicone oil react with 20 to 80 parts of diisocyanate to obtain a polyurethane prepolymer which contains a hyperbranched silicone oil side chain and is blocked by an isocyanate group; adding 2 to 19 parts of small molecular polyol chain extender into the prepolymer and 0.1 to 10 parts of amino-containing small molecular dihydric alcohol for chain extension, and performing quaternization and further emulsification to obtain hyperbranched silicone oil side chain modified polyurethane polymer emulsion. In the hyperbranched silicone oil side chain modified waterborne polyurethane emulsion, a hyperbranched siloxane chain segment is adopted, so that the water contact angle is increased, and the water absorption of polyurethane is lowered; the emulsion can be used as a fluorine-free waterproof agent to be applied to chemical fiber cloth or cotton; the preparation method is simple in process, the reaction speed is moderate and the operating conditions are easy to control; the product belongs to a water-based emulsion, and conforms to the development direction of environmental friendliness.

The invention discloses a making method of rhodiola root glycoside,which comprises the following steps: a. adding water to dissolve crude extract of rhodiola root; adjusting pH value as alkaline; filtering to obtain the filtrate; b. adjusting the filtrate to acid; adsorbing through adsorbing resin; eluting; condensing the eluent; sedimenting the eluent in the alcohol; filtering to obtain the filtrate; c. drying the filtrate through adsorbing resin; adding the dried material into column chromatograph; collecting the chromatographic liquor; d. condensing the chromatographic liquor; doing alcohol sediment; crystallizing. The invention also provides freeze dried and injection of the rhodiola root glycoside with simply and controllably operating condition and high safety, which is easy to accomplish for large scale of industrial manufacturing.

The invention discloses a 2-(2'-hydroxyl styryl) naphthyridine probe reagent and preparation and application thereof. The probe reagent is mainly prepared by concentrated sulfuric acid, sodium 3-nitrobenzene sulfonate, boric acid, FeSO4.7H2O, 2-amino-6-picoline, salicylide, glycerol and acetic anhydride. The 2-(2'-hydroxyl styryl) naphthyridine probe reagent has the advantages that the probe reagent can selectively detect various target ions, single-probe, multi-target and multi-mode identification and detection are achieved, and the probe reagent can be used for detecting Hg<2+>, Ag<+> and F<-> ions; a probe is simple in structure, low in preparation cost, diversified in detection and identification manners, high in detection sensitivity, good in selectivity, excellent in performance, easy in operation condition control and promising in application prospect.