43results about How to "High value of industrial production" patented technology

The invention discloses a method for compositing iron oxide and graphene by virtue of a hydrothermal process. The method comprises the following steps: 1) dissolving hexahydrate ferric trichloride and oxidized graphene, (ammonium dihydrogen phosphate and sodium hydroxide) in a certain amount of deionized water to obtain a solution; 2) ultrasonically treating the solution for 1 hour; 3) putting magnetons in the solution and magnetically stirring the solution for 2 hours; 4) pouring the stirred solution into a high-pressure reaction kettle, putting the high-pressure reaction kettle into an electrothermal constant-temperature drying oven and reacting the solution for a period of time at preset temperature; and 5) performing centrifugal washing and vacuum drying to obtain a composite of iron oxide and graphene. The composite precipitate prepared by virtue of the hydrothermal process has controllable particle size, good dispersibility, high utilization rate of sunlight, excellent electronic transmission performance, as well as excellent properties in the application aspects of photo-catalytically degrading organic pollutants and serving as a negative material of a novel lithium battery, thereby having a high industrial production value.

The invention discloses a mutant of Beta-galactosidase as well as a preparation method and application thereof, and belongs to the fields of gene engineering and enzyme engineering. Through mutating an amino acid at a specific locus in the Beta-galactosidase, transferring into a recombinant bacterium and then carrying out enzymatic conversion in an optimized condition, a yield of galactooligosaccharide generated by the mutant reaches 59.8 percent, and is increased by approximately 70 percent compared with that of a wild enzyme; the improvement of the yield of the galactooligosaccharide is realized, and the mutant has extremely high industrialized application.

The invention relates to an electromagnetic induction heating 3D printing and forming system, and relates to the technical field of 3D printing equipment. By adopting an electromagnetic induction heating technology, the electromagnetic induction heating can realize high heating efficiency, energy conservation and environmental protection, so that the defects of low efficiency, high energy consumption and the like of resistance wire heating can be avoided. In addition, the electromagnetic induction heating is high in temperature and uniform in heating, controllable in heating speed and heatingtemperature, and relatively high in control sensitivity; next, by adopting an electromagnetic heating disk mode, an electromagnetic induction coil is wound into a disk shape, so that the overall structural size is small, and too much space of the forming system is not occupied; the invention provides circular, square, rectangular and fan-shaped electromagnetic induction coil winding modes, so thata thought is provided for the electromagnetic induction heating coil winding modes; and specific to different equipment structural characteristics, different winding modes can be selected, so that space can be utilized effectively, and heating uniformity is ensured.

The invention discloses a preparation method for sulfasalazine. The preparation method comprises the steps of: S1, carrying out a diazotization reaction on sulfapyridine in an aqueous solution dissolved with hydrochloric acid and sodium nitrite to obtain diazonium salt; S2, carrying out a coupling reaction on the diazonium salt and salicylic acid in a sodium hydroxide aqueous solution to obtain a sulfasalazine crude product; and S3, purifying the sulfasalazine crude product. According to the preparation method disclosed by the invention, by taking sulfapyridine as an initial raw material, the diazotization reaction, the coupling reaction and purification are successively carried out to obtain the sulfasalazine. The diazotization reaction and the coupling reaction have a relatively high conversation rate and relatively few side reactions, so that the purity of the product is improved, and the yield is ensured. In addition, the sulfapyridine is easily available in source, so that the production cost is lowered, and the preparation method has relatively great industrial production value.

The invention relates to a carbon-loaded metal catalyst as well as a preparation method and application thereof. The carbon-loaded metal catalyst comprises a carbon carrier and high-entropy alloy particles loaded on the surface of the carbon carrier, and the high-entropy alloy particles comprise ruthenium, iron, cobalt, nickel and platinum. Experiments prove that under the condition of the same metal loading capacity, the catalytic performance of the carbon-loaded metal catalyst provided by the technical scheme of the invention is not greatly different from that of a ruthenium-platinum-carbondouble-noble-metal catalyst, and compared with iron-platinum, nickel-platinum, cobalt-platinum and other double-metal carbon-based catalysts, the carbon-loaded metal catalyst provided by the inventionis better in catalytic performance and more stable in recycling performance. Meanwhile, the cost of metal elements such as iron, cobalt and nickel in the high-entropy alloy particles is relatively low, so that the cost of the carbon-loaded metal catalyst is greatly reduced.

The invention discloses an asymmetric synthesis method for a 3,3'-diaryl substituted chiral spiro bisphenol compound. The method comprises the steps that acetone serves as a raw material and is subjected to condensation reaction with substituted benzaldehyde so as to obtain I; under the action of a chiral rhodium catalyst, the compound I and an aryl boron reagent are subjected to enantioselectivesynthesis so as to obtain II; and under the catalysis of Bronsted acid or Lewis acid, the compound II is subjected to intramolecular Friedel-Crafts reaction so as to prepare a compound III. The synthesis method has the advantages that chiral raw materials are not needed, splitting is not needed, the yield is high, the enantioselectivity is good and the like; in an amplified synthesis process, theamount of the chiral rhodium catalyst can be as low as 0.5 mol%, and industrial production application values are achieved.

The invention belongs to the field of resin product treatment, and concretely relates to a device and a method for atomization cleaning of 3D printing photosensitive resin. The device comprises a cleaning tank, alcohol containers, a high gas system and a waste liquid collector. A filter screen baffle plate is arranged in the cleaning tank to prevent the above product from directly immersing in alcohol; the cleaning tank adopts a glass cover plate, so the cleaning tank is visible; the front side of the cleaning tank is provided with a glove operating opening, so the cleaning tank is convenient to clean; three alcohol containers are arranged above the cleaning tank, and are respectively used for containing cleaning liquids recovered at different recovery times, the rear side of the cleaning tank is provided with a high pressure gas pipeline to realize alcohol atomization, and valve switches are arranged below the alcohol containers and on pipelines to control the flow; and a valve arranged below the cleaning tank, and a waste liquid collecting container is arranged below the valve. Grading multi-time recovery, one-time recovery and new alcohol cleaning are adopted, so the cost is greatly reduced, the cleaning flow of the 3D printing photosensitive resin is standardized, the flow and the pressure are controllable, and rapid cleaning of the surface of the product is realized.

The invention discloses a method for producing ultrahigh molecular weight polyethylene with M miu of 1.5-8 million. The method comprises that an external electron donor is added into a reaction systemin the presence of a main catalyst and a cocatalyst and then the system undergoes homopolymerization of ethylene. Through the use amount of the silane external electron donor, the molecular weight ofthe ultrahigh molecular weight polyethylene is adjusted without change of catalyst conditions and through use of the ester external electron donor, the particle size and distribution of the ultrahighmolecular weight polyethylene powder are improved. The method has the advantages of control of technical conditions and temperature, simple operation and remarkable industrial value.

The invention discloses composite ceramics prepared from the following components by weight: 97%+/-0.1% of alumina, 3%+/-0.2% of talc, 3.5%+/-0.1% of zirconium dioxide and 1%+/-0.1% of vanadium zirconium yellow. The hardness, wear resistance and toughness of alumina are changed by using high-weight-ratio alumina proportioning and supplement of zirconia, talc and vanadium zirconium yellow, the hardness higher than that of other alumina ceramics is achieved, the toughness better than that of other alumina ceramics is achieved, the hardness reaches 1100-1150 Vickers hardness, and the wear resistance also reaches 30 million times. Therefore, the composite ceramics have wide application prospects in new energy vehicle industry, and especially are applied in automotive seal parts and valves.

The invention provides a treatment method of phenol-based residues of a rectifying still. The treatment method comprises the following steps: carrying out reduced-pressure deep drawing on the phenol-based residues of the rectifying still to obtain a reduced-pressure pull-out substance and reduced-pressure deep drawing still residues; and subjecting the reduced-pressure deep drawing still residuesto carbonization to obtain a gas-phase product and activated carbon, or to extraction and cross-linking polymerization to obtain condensed polyaromatic hydrocarbon resin. Thus, phenol-based residual solid waste of the rectifying still can be effectively converted into an industrial product with excellent performance, environmental pressure is relieved, good economic benefit is obtained, wide application prospects are realized.

The invention discloses a comprehensive water-saving process for producing stevioside. Down-column water generated in a resin adsorption step is subjected to purification treatment and a waste acid, a waste alkali and waste water, which are generated in an adsorption resin and desalting and decolorizing resin regeneration step are subjected to treatment, in the production procedure of the stevioside. According to the comprehensive water-saving process, a water extracting solution of a stevia leaf is subjected to resin adsorption; down-column waste water is subjected to rough filtration, primary filtration, ceramic film filtration, resin adsorption treatment, ozone treatment, adsorption filtration and reverse osmosis treatment in sequence to obtain purifier water which is directly used for the water extraction of the stevia leaf; abundant waste acid, waste alkali and waste water, which are produced in a resin regeneration procedure, are recycled; a water consumption is decreased by 70 percent or above; an acid consumption and an alkali consumption are decreased by 60 percent or above; meanwhile, by-products flavone and chlorogenic acid are obtained. According to the comprehensive water-saving process, a new pollutant does not be generated; no new chemical reagents are put; the quality of treated water is high; part of indexes are superior to those of underground water and municipal water; the ash content of a stevioside product can be decreased; the improvement of the purity and the yield of the product is facilitated; the industrial production value of the stevioside is improved.

The invention belongs to the technical field of preparation of photocatalyst materials, and relates to a CdZnS superfine nanoparticle loaded In2O3 fusiform nanorod composite material, and a preparation method and application thereof. The heterogeneous optical composite material for catalyzing hydrogen production, which is prepared by loading CdZnS superfine nanoparticles on fusiform mesoporous In2O3 nanorods, can be stably applied to hydrogen production by photocatalytic decomposition of water, solves the instability caused by photocorrosion of CdZnS in a photocatalytic process, not only widens the light absorption range of a photocatalytic material, but also greatly enhances the catalytic hydrogen production efficiency. And the whole preparation process is simple, the reaction is easy to control, the repeatability is very good, and the industrial production value is very high.

The invention relates to a preparation method of an amino-substituted quinoline nitrogen heterocyclic ring. The amino-substituted quinoline nitrogen heterocyclic ring is prepared through a specifically-made reaction kettle, the reaction kettle is provided with a kettle body (1) made of glass, and the kettle body is provided with a kettle cover (11), a lower flange (12) and a cylinder (13); the reaction kettle further comprises an air inlet combination (2), an air outlet combination (3), a fixing device (4) and a stirring part (5). The method comprises the steps that 8-bromoquinoline is dissolved in N,N-dimethylformamide for preparing 8-quinolinecarbonitrile, then the 8-quinolinecarbonitrile reacts with a sulfuric acid aqueous solution to obtain 2quinoline-8-formic acid, the 2quinoline-8-formic acid is dissolved in methyl alcohol, and thionyl chloride is dropwise added to obtain quinoline-8-methyl formate; the quinoline-8-methyl formate is dissolved in carbon tetrachloride, pyridine is added, and bromine is dropwise added to obtain 3-bromoquinoline-8-methyl formate; the 3-bromoquinoline-8-methyl formate reacts with lithium hydroxide to prepare 3-bromoquinoline-8-formic acid; through transition of 3-bromine-8-Boc-aminoquinoline, a product 3-bromine-8-aminoquinoline is obtained.