32results about How to "Limit content" patented technology

The invention provides a method for preparing gamma-butyrolactone (GBL) and N-methylpyrrolidone (NMP), more specifically, a method for preparing NMP, comprising introducing 1,4-butanediol in a reactor, performing dehydrogenation in the presence of metallic oxide catalyst to provide GBL; supplying monomethyl amine (MMA) aqueous solution and GBL to the reactor; separating the NMP generated by the reaction of the MMA and the GBL from the water; mixing the separated water with the MMA to provide the MMA aqueous solution; and leading the MMA aqueous solution back into the reactor. Since the GBL is prepared from the butanediol in the presence of the catalyst, the water generated from the reaction of the MMA and the GBL is collected to provide the MMA aqueous solution, and the MMA aqueous solution is returned to the reactor, the prepared NMP has the advantages that energy is saved and simple separation of the product NMP is realized.

The invention discloses anti-sticking alginate dressing and a preparation method thereof. The alginate dressing comprises a bottom layer, a water-absorbing layer, a surface layer and an anti-sticking layer, wherein the alginate dressing is of a layered structure; the bottom layer, the water-absorbing layer, the surface layer and the anti-sticking layer are sequentially overlapped to form the layered structure; breathable holes are formed in the bottom layer; the hole diameters of the breathable holes are smaller than or equal to 0.22 micron. The breathable holes are formed in the bottom layer of the dressing, and the hole diameters of the breathable holes are smaller than or equal to 0.22 micron, so that the dressing has a breathable function, and bacteria are unlikely to enter; the alginate dressing provided by the invention is further provided with the water-absorbing layer, and the provided water-absorbing layer can maintain proper humidity of a wound, so that wound healing is facilitated.

The invention aims to provide a marine exhaust gas SOx removal device for a rotary spraying refluxing bubble tower. The marine exhaust gas SOx removal device comprises a washing tower, a NaOH solution storage cabin, a waste liquid buffer tank and waste liquid centrifugal treatment equipment; the washing tower comprises a washing tower outer layer cylinder; a washing tower inner layer cylinder and a spiral rising washing pipeline are arranged in the washing tower outer layer cylinder; an exhaust gas inlet, an exhaust gas outlet and a washing liquid outlet are respectively formed in the outer wall of the washing tower outer layer cylinder; the exhaust gas inlet is connected with a marine diesel engine exhaust pipe; the exhaust gas outlet is communicated with the atmosphere; the washing liquid outlet is communicated with the waste liquid buffer tank; the waste liquid buffer tank is connected with the waste liquid centrifugal treatment equipment; the waste liquid centrifugal treatment equipment is connected with each of an oil contamination storage cabin and a heavy residue storage cabin. According to the marine exhaust gas SOx removal device, SO2 in exhaust gas is subjected to washing treatment by adopting two technologies, namely a novel rotary spraying washing technology and a novel pneumatic stirring bubbling washing technology; the contact path between the washing liquid and the exhaust gas is increased; the acting time is prolonged; the acting area is increased, so that the exhaust gas is treated sufficiently.

The invention relates to a curcuma beverage and a making method thereof. The making method comprises the following steps of (1) extracting a curcuma extract from fermented curcuma powder with an organic solvent, so as to obtain an extracting solution containing the curcuma extract; (2) performing rectification on the obtained extracting solution, so as to obtain a curcuma extract; (3) adding the obtained curcuma extract, radix puerariae powder and syrup to boiling water, and performing stirring, so as to obtain a gelatinized mixture; and (4) cooling the gelatinized mixture, and adding honey and soybean lecithin under an aseptic condition, so as to obtain the curcuma beverage. According to the curcuma beverage disclosed by the invention, curcumin is extracted with fermented curcuma powder,so that the extraction rate is increased; the curcuma extract, the radix puerariae powder, the syrup, the honey and the soybean lecithin powder are combined, and through combination of a specific production technology, the problems that the curcumin is low in absorptivity by human bodies, insoluble in water, easy to precipitate and easy to delaminate, are solved; the efficacy of neutralizing the effect of alcoholic drinks, protecting the liver, resisting oxidation and resisting mutation of the curcuma beverage is strengthened; and a new way is developed for the utilization of the curcuma.

Solutions of polyvinylidene resins with very high vinylidene difluoride content in lactam solvent systems and their uses to form high gloss coatings, especially high gloss clear coatings. The present invention also provides coated articles incorporating these coatings. Advantageously, polyvinylidene fluoride (PVDF) resins with sufficiently high vinylidene difluoride content, as well as a wide variety of thermoplastic and thermosetting resins useful in the practice of the present invention, can be easily dissolved in and then stay dissolved in lactam solvents. Conveniently, these solutions may be prepared at room temperature. The ability to coat such PVDF resins from solution, rather than from dispersions, is a key factor leading to the high gloss characteristics provided by many embodiments of the present invention.

The invention relates to an ultra-high wear-resistant hypereutectic high chromium cast iron material which comprises the following chemical components in percentage by mass: 4.0-5.0% of C, 25-35% of Cr, 0.5-1.0% of Si, 1.5-2.5% of Mn, less than or equal to 1% of Ni, 2-4% of Mo, and the balance Fe. The invention also relates to a preparation method of the ultra-high wear-resistant hypereutectic high chromium cast iron material, and relates to a smelting technology and an application of stable production of slurry pump flowing parts. Compared with BTMCr26 and Cr15Mo3 materials, the ultra-high wear-resistant hypereutectic high chromium cast iron material has a high carbon content and a high chromium content and a large amount of carbides, and the wear resistance of the material can be effectively improved.

The invention provides a quantitative injector, and belongs to the technical field of medical instruments. The quantitative injector comprises a shell assembly, an injection pushing assembly and a limiting adjusting assembly. A protruding block is connected to one end of the shell, a communicating pipe is connected to the other end of the shell, a connecting piece is communicated with the communicating pipe, a piston piece is arranged between a push rod and the shell, a rotating piece is arranged on one side of the outer portion of a mounting shell, and the rotating piece is connected with a speed reducing piece; an adjusting bolt is connected between the shell and a connecting rod, a supporting plate is connected with the other end of a supporting rod, and the limiting baffle is connected to one side of the supporting plate. According to the invention, the flow and the speed of liquid medicine injection can be accurately controlled, the adverse effect on the physical condition of a patient caused by too fast injection of the medicine can be reduced, and meanwhile, the content of extracted medicine can be effectively controlled.

The invention proposes a method for preparing a phosphogypsum roadbed material based on high-temperature activation and improved hydraulicity, which relates to the field of roadbed materials. In the present invention, phosphogypsum with a free moisture content of 7%-20% is firstly calcined at high temperature into a high-temperature product, and then the waterproofing agent slurry obtained by mixing silane coupling agent, polyvinyl alcohol and hot water is prepared, and finally the prepared high-temperature The product, waterproofing agent slurry and Portland cement are mixed according to the mass percentage of 85%-93%: 3.5%-5%: 3%-10%, and the phosphogypsum roadbed material is obtained by stirring evenly; , C 3 The mass fraction of mineral A in Portland cement is 2%-5%, and mineral admixtures containing aluminosilicate must not be mixed in Portland cement. The prepared phosphogypsum roadbed material has good strength, water stability and volume stability, and has simple preparation process, low production cost and wide source of raw materials.

The invention relates to a turmeric drink and a preparation method thereof. The preparation method comprises the following steps: (1) using an organic solvent to extract the turmeric extract in the fermented turmeric powder to obtain an extract containing the turmeric extract; (2) performing rectification on the extract to obtain the turmeric extract; (3) ) adding turmeric extract, kudzu root powder and syrup into boiling water, and stirring to obtain a gelatinized mixture; (4) cooling the gelatinized mixture, and adding honey and soybean lecithin under aseptic conditions to obtain a turmeric drink. The invention adopts fermented turmeric powder to extract curcumin, which improves the extraction rate. The present invention combines turmeric extract with kudzu root powder, syrup, honey and soybean lecithin powder, and combines a specific production process to solve the problems of low absorption rate of curcumin by the human body, insoluble in water and easy precipitation and stratification, and enhance The anti-alcoholic, liver-protecting, anti-oxidation and anti-mutation effects of turmeric drink have been discovered, and a new way for the utilization of turmeric has been expanded.

The invention relates to a solid powder multi-element composite infiltration agent and a composite infiltration process, and belongs to the technical field of metal surface treatment. The composite infiltration agent is composed of a chromium source, a vanadium source, a boron source, nickel powder, an activating agent, a filling agent, an oxygen scavenger and a rare-earth infiltration enhancer. The composite infiltration agent has the effects of rapid infiltration speed, no pollution, improving the structural density of an infiltration layer, and avoiding the embrittlement of the infiltrationlayer. The composite infiltration process comprises the following steps of carrying out acid pickling activation pretreatment on a base body material, then burying the base body material into the composite infiltration agent, heating and preserving heat in a carbon-containing or nitrogen-containing atmosphere, and then carrying out quenching treatment after furnace cooling. According to the process, the method is simple, no pollution occurs, the infiltration speed is rapid, the infiltration agent is free of hardening, and the surface of an infiltrated workpiece is clean. The prepared composite infiltration layer is fine in the crystalline grains and compact in the structure, has a good gradient structure, has the toughness, the wear resistance, the corrosion resistance, the high-temperature oxidation resistance and the like, and can be applied to parts such as a tool, a mold, a bearing, and a gear.

The invention discloses a method for efficiently controlling dioxins in garbage incineration, which comprises the following steps: a. After blending the garbage with a chelating agent, the garbage is put into an incinerator for incineration; b. The flue gas generated in step a enters the flue gas for washing Tower, spray alkali solution for treatment; c. The flue gas treated in step b leaves the tower and sprays adsorbent, then collects fly ash through dust collector, and discharges gas. This method adopts corresponding measures to control dioxins in the front, middle and back stages of waste incineration treatment. The premixing before incineration reduces the source of chlorine in incineration, and the flue gas produced by incineration limits the formation of dioxins through washing. The required reactant content and catalyst activity, and the residual dioxins are stabilized by adsorption in the later stage, which realizes the overall efficient control of dioxins, avoids complicated equipment modification, and the cost is controllable.

The invention relates to an in vivo degradable dispersion-strengthened biomedical multi-element magnesium alloy and a preparation method thereof. The weight percentage of its components is: Zn 1.9-2.1%, Ce 0.5-1.4%, Ca 0.9-1.0%, Mn 0.4-0.5%, and the rest is Mg; a finely dispersed second phase is distributed in the magnesium matrix. First, the alloy ingot is melted according to the designed composition, in which Ce promotes the discontinuous distribution of the second phase along the crystal, and then the second phase can be fully dissolved into the matrix phase after solid solution treatment, and then the aging will make the fine second phase in the magnesium matrix phase. Dispersed precipitation in the interior. The obtained magnesium alloy has the advantages of high strength and toughness, corrosion resistance, good biocompatibility, and complete degradation in vivo, and can be used for biological implants such as bone plates, bone nails, and intravascular stents. The invention can significantly improve the microstructural defects of magnesium alloys produced by traditional melting and casting methods. Through the aging precipitation strengthening effect of the fine second phase, while greatly improving its processing performance and mechanical properties, it can solve the excessively fast biological corrosion rate in its clinical application. question. Its process operation and equipment requirements are simple, and it has a good industrial application prospect.

The invention aims to provide a marine exhaust gas SOx removal device for a rotary spraying refluxing bubble tower. The marine exhaust gas SOx removal device comprises a washing tower, a NaOH solution storage cabin, a waste liquid buffer tank and waste liquid centrifugal treatment equipment; the washing tower comprises a washing tower outer layer cylinder; a washing tower inner layer cylinder and a spiral rising washing pipeline are arranged in the washing tower outer layer cylinder; an exhaust gas inlet, an exhaust gas outlet and a washing liquid outlet are respectively formed in the outer wall of the washing tower outer layer cylinder; the exhaust gas inlet is connected with a marine diesel engine exhaust pipe; the exhaust gas outlet is communicated with the atmosphere; the washing liquid outlet is communicated with the waste liquid buffer tank; the waste liquid buffer tank is connected with the waste liquid centrifugal treatment equipment; the waste liquid centrifugal treatment equipment is connected with each of an oil contamination storage cabin and a heavy residue storage cabin. According to the marine exhaust gas SOx removal device, SO2 in exhaust gas is subjected to washing treatment by adopting two technologies, namely a novel rotary spraying washing technology and a novel pneumatic stirring bubbling washing technology; the contact path between the washing liquid and the exhaust gas is increased; the acting time is prolonged; the acting area is increased, so that the exhaust gas is treated sufficiently.

The invention discloses a manufacturing process of a load-bearing arm of a robot hand. The load-bearing arm is divided into four parts and cast independently, and then assembled in a double-connected and fixed manner, and finally ion-nitrided. The invention can solve the shortcomings of the prior art, enhance the tolerance of the load-bearing arm and improve its service life.

The invention discloses a process for dehydrating hydrocarbon-based gas. The present invention proposes to use a dry stream which is rich in C4 to C10 hydrocarbons as stripping agent for improving theregeneration of the liquid desiccant according to the invention. This dry stream rich in C4 to C10 hydrocarbons is extracted from the gas derived from the dehydration, for example during a step of extraction of NGL located downstream of the gas dehydration unit. The stream of stripping agent recovered at the outlet of the liquid desiccant regeneration unit may be recycled into the process of theinvention or sent to a unit external to the process according to the invention. For example, this stream of stripping agent recovered at the outlet of the regeneration unit is sent to a unit which canreceive wet condensates, such as a three-phase separation unit at the inlet of a crude gas processing plant, a condensate stabilization unit, etc.

The present invention provides reliable and easy identification / quantification of additives and foreign matter contained in the negative electrode, while reducing the amount of impurities mixed in the negative electrode, while suppressing the mixing of large-sized impurities, high reliability, charge and discharge efficiency and cycle life Electrochemical cells with excellent properties. The electrochemical cell is formed with positive pole (30), negative pole (40), electrolyte solution containing supporting electrolyte and non-aqueous solvent and separator (5), and the negative active material used in the negative pole (40) is SiOx (0< At least any one of x<2), Si, and C, in addition, the thickness of the negative electrode (40) is 200 μm or less, and in the transmission X-ray observation of the negative electrode (40) per 100 cm2 electrode area in planar observation, the negative electrode (40) The number of foreign substances with an average particle diameter of φ20 μm or more contained in the container is 40 or less.

The invention belongs to the technical field of pin shaft machining, and relates to a wear-resisting pin shaft and a machining method thereof. The wear-resisting pin shaft and the machining method thereof solve the problems that an existing pin shaft is low in strength and hardness. The wear-resisting pin shaft is formed by machining wear-resisting pin shaft steel which is composed of, by mass, 0.38%-0.45% of C, 1.0%-1.2% of Mn, 0.8%-1.1% of Cr, 0.20%-0.35% of Si, not larger than 0.25% of Ni, not larger than 0.025% of S, smaller than 0.025% of P, 0.3%-0.5% of Mo, 0.2%-0.5% of V, and the balance Fe. The wear-resisting pin shaft has the advantages of being high in strength and hardness.

The invention discloses anti-sticking alginate dressing and a preparation method thereof. The alginate dressing comprises a bottom layer, a water-absorbing layer, a surface layer and an anti-sticking layer, wherein the alginate dressing is of a layered structure; the bottom layer, the water-absorbing layer, the surface layer and the anti-sticking layer are sequentially overlapped to form the layered structure; breathable holes are formed in the bottom layer; the hole diameters of the breathable holes are smaller than or equal to 0.22 micron. The breathable holes are formed in the bottom layer of the dressing, and the hole diameters of the breathable holes are smaller than or equal to 0.22 micron, so that the dressing has a breathable function, and bacteria are unlikely to enter; the alginate dressing provided by the invention is further provided with the water-absorbing layer, and the provided water-absorbing layer can maintain proper humidity of a wound, so that wound healing is facilitated.