7745 results about "Ethylic acid" patented technology

The invention discloses a catalyst for preparing alcohol by acetic ester hydrogenation as well as a preparation method and an application thereof, which is characterized in that the main catalyst of the catalyst is copper or copper oxide or a mixture of the copper and the copper oxide, and the cocatalyst can be also added, wherein the cocatalyst is one or more of oxides of zinc, manganese, chromium, calcium, barium, iron, nickel and magnesium; and the carrier is alumina or silica sol. The catalyst has high activity and high selectivity under the condition of low temperature and low pressure, thus greatly reducing the investment cost of permanent plants, lowering production energy consumption, being extremely beneficial for the industrial production, and having good stability and long service life. The catalyst of the invention is used to cause percent conversion of a reaction of converting the acetic ester into the alcohol is more than or equal to 80% and the selectivity of the alcohol is more than or equal to 95%.

A catalyst for synthesizing vinyl acetate from acetylene and acetic acid is prepared from activated carbon, zinc acetate and alkaline bismuth carbonate in mass ratio of 100: (27-40): 0.026 by excessive solution dipping method.

The invention discloses a specific nanometer paint of energy-saving environment-protective typed aluminium alloy section bar (door and window), which comprises the following parts: 90-100% filming agent, 0.1-10% hardener, 0.5-8% levelling agent, 0.5-10% nanometer material, 20-50% fill and 10% hollow microball, wherein the filming agent is one or more of epoxy resin, polyester resin, acrylic acid resin, amino resin, phenol resin or alkide resin; the hardener is one or more of dicyandiamide, imidazole, dihydrazide, polybasic carboxylic acid, beta-hydroxyalkyl amide or triglycidol isocyanuric ester hardener; the levelling agent is one or more of polyacrylic resin, siliceous acryl resin, polyvinyl butyral, benzoin, hydrocastor oil, cellulose acetate butyrate or epoxy soy oil; the nanometer material is nanometer zinc oxide; the hollow micro-ball is hollow ceramic microball.

The invention discloses a multifunctional textile finishing agent. The multifunctional textile finishing agent comprises the following components in percentage by weight: 1.00 to 5.00 percent of fibroin, 0.01 to 0.10 percent of chitosan, 0.01 to 0.50 percent of titanium dioxide, 0.01 to 1.50 percent of cross-linking agent, 0.50 to 5.00 percent of acetic acid, 0.10 to 0.80 percent of metal salt catalyst and the balance of water. The ecological multifunctional textile finishing agent involved by the invention is made of environment-friendly raw materials, is convenient to process, is not toxic or harmful to a human body and have no pollution; a finishing method is simple and is suitable for industrial production by a padding method; and the appearance of a finished textile is not influenced, namely the color does not turn yellow and the finished textile has a good anti-wrinkle effect and comfortable handfeel.

The invention relates to a transparent super-amphiphobic surface layer and a layer-by-layer in-situ spraying reaction preparation method. The method comprises the steps of sequentially spraying priming paint solutions and finishing paint solutions on a base body in a layer-by-layer in-situ mode through a spraying gun and by adopting the same spraying technology, sequentially spraying acetic acid water solutions of 1 wt.% and fluorine-silicane solutions of 0.1-2 wt.%, carrying out curing at normal temperature and then obtaining a transparent super-amphiphobic surface. The priming paint solutions are obtained by adding hydrophobic transparent resin and corresponding curing agents into soluble solvents and then dispersing the mixtures ultrasonically until the resin is completely dissolved; the finishing paint solutions are obtained by adding hydrophilic fumed silica into ethyl alcohol and forming solutions ultrasonically. According to the invention, the preparation technology for needed coatings is simple, the spraying technology is easy and convenient to operate, coatings are super-hydrophobic, super-oleophobic and highly transparent, and the application prospect is wide in the fields of solar panels, glasses and automobile windshield glass.

The invention provides a completely new process route for synthesizing dexamethasone and series products thereof. The invention adopts 1, 4, 9, 16-tetraene-pregna-3, 20-diketone as the original material which is modified by 9, 11bits, 16, 17 bits and 21 bits so as to obtain the dexamethasone and the series products thereof such as dexamethasone acetate and dexamethasone sodium phosphate and the like. The process has the advantage that the invention adopts the existing intermediates of manufacturers as the original material; the route is simple; the materials are available; the use of expensive accessories is avoided; the yield and the cost are dramatically better than that of the prior methods used for synthesizing the dexamethasone and derivatives thereof; moreover, the adoption of the existing intermediates realizes the combined-line prodction of the betamethasone series products and the dexamethasone series products, thus greatly reducing the manufacturing cost and the industrial manufacturing condition.

The invention discloses a preparation method of essence microcapsules. The preparation method comprises the following steps: (1) dissolving chitosan in acetum; (2) adding emulsifier and essence into the chitosan acetum for high-speed emulsification and dispersion to obtain the chitosan essence emulsion; (3) adding the mixed solution of sodium alginate and sodium tripolyphosphate dropwise into the chitosan essence emulsion; (4) adjusting the pH value of the system to 5-7 with NaOH solution to obtain the condensed essence microcapsules; and (5) adding cross-linking agent into the condensed essence microcapsule system to perform chemical cross-linking process on the condensed essence microcapsules to obtain the essence microcapsules. For the essence microcapsules prepared according to the method disclosed by the invention, as chemical cross-linking process is implemented on the walls of the capsules, the density of the capsule walls and the resistance to the solution alkalinity/acidity are improved, and the application stability of the essence microcapsules is increased; moreover, with small size, the capsules can easily permeate into textile fiber, and the water-washing resistance of the textile fiber is greatly improved.

The invention provides a boiler coal combustion-improving desulfurizing and denitrifying agent composition. The composition comprises the following raw materials in parts by weight: 2-7 parts of sodium carbonate, 1-3 parts of alumina, 2-8 parts of aluminium hydroxide, 2-5 parts of ferric trichloride, 2-6 parts of ferric oxide, 3-10 parts of potassium permanganate, 3-10 parts of potassium chlorate, 10-35 parts of activated attapulgite clay, 15-30 parts of urea, 2-4 parts of ammonium formate, 2-4 parts of ammonium chloride, 6-23 parts of ammonium acetate, 3-9 parts of manganese oxide, 9-12 parts of copper chloride, 1-3 parts of copper oxide, 2-4 parts of zinc sulfate, 1-3 parts of zinc nitrate, 7-18 parts of potassium dichromate, 1.0-1.5 parts of titanium dioxide, 0.5-1.0 part of barium molybdate, 0.5-1.5 parts of cobalt sulfate, 0.5-1.5 parts of vanadium pentoxide, 0.3-0.7 part of cerium oxide, 0.1-0.2 part of sodium dodecyl benzene sulfonate and 0.1-0.2 part of alkyl glyceryl ether. The composition is convenient to use, has stable properties, plays roles of combustion improving, desulfurization and denitrification, has coal saving rate of 8-25% and can remove fixed sulfur by 50-70%.

The invention relates to a polysiloxane coating composition belonging to a coating chemical manufacturing technology. The polysiloxane coating composition is obtained by reacting hydrogenated epoxide resin and amino-functionalized siloxane and combining acrylic resin with good coating performance and weatherability and polyetheramine resin with excellent flexibility and adhesion. The invention particularly relates to a polysiloxane coating composition applied to offshore oil platforms. The polysiloxane coating composition has weather-proof, water-proof and corrosion-resistant performances, good flexibility and excellent ply adhesion. The polysiloxane coating composition comprises the following ingredients of 12-50 of epoxide resin, 10-40 of acrylic resin, 0.5-1.5 of dispersant, 20-30 of titanium pigment, 5-25 of French chalk, 5-15 of mica powder, 0.5-1.5 of rheological agent, 0.5-2 of anti-settling agent, 2-10 of dimethyl benzene, 5-10 of butyl acetate, 15-40 of curing agent 1 and 5-25 of curing agent 2 according to the weight percent.

The invention relates to a method for preparing an NCC/CS/PVA composite nanofiber membrane. NCC is rod-shaped particles, wherein the diameter of each particle ranges from 20 nm to 60 nm, and the particles are highly crystallized. The method comprises the steps that (1) an NCC/CS solution is prepared, wherein the concentration of the NCC, by weight, ranges from 0.09% to 0.21%; (2) an NCC/PVA solution is prepared, wherein the concentration of the NCC, by weight, ranges from 0.4% to 0.8%; (3) an acetic acid solution, tetraethyl orthosilicate, the NCC/CS solution obtained in the step (1) and processed through ultrasound, and the NCC/PVA solution obtained in the step (2) and processed through ultrasound are mixed to obtain a spinning solution, and the nanofiber membrane is obtained through the electrospinning technology, wherein the mass ratio of the acetic acid solution to the tetraethyl orthosilicate to the NCC/CS solution to the NCC/PVA solution is (2.5-3.5):(1.5-2.5):5:5; (4) the obtained nanofiber membrane is immersed in an alkaline solution for 2-6 hours at the normal temperature, and the membrane structure can be stable. The method for preparing the NCC/CS/PVA composite nanofiber membrane has the advantages that the nanofiber material preparation process is simple, the preparation process is environmentally friendly and free of pollution, nanofibers are excellent in mechanical performance, the surface of the nanofiber membrane is rich in modifiable functional groups, and the nanofiber membrane has a remarkable affinity effect on biomacromolecule.

The invention relates to a guided tissue regeneration membrane, which comprises a compact coating and a loose coating, wherein the compact coating is composed of collagen-I or collagen-I composite hyaluronic acid; and the loose coating is composed of collagen-I or collagen-I composite calcium salt. A preparation method of the guided tissue regeneration membrane comprises the following steps of: preparing a collagen solution or a collagen and hyaluronic acid mixed solution by the use of acetic acid; injecting the solution into a self-made die, and drying it in the air to prepare the compact coating; injecting the collagen solution or a mixed liquor of the collagen solution and calcium salt onto the compact coating, and uniformly spreading; precooling the die at ultralow temperature, followed by freeze-drying to prepare the guided membrane with the compact coating and loose coating structure; carrying out vacuum high-temperature crosslinking and chemical crosslinking; and finally cleaning. The regeneration membrane has good histocompatibility and mechanical strength, low antigenicity and strong guided tissue regeneration capability. Its degradation rate in vivo is 3-8 months. The method is easy to operate, is suitable for automatic and continuous large-scale production, and solves the problems of large size of collagen membrane and material uniformity during industrial production.

The invention discloses a method for synthesizing methyl propionate by ethylene. The methyl propionate is prepared from the materials: ethylene, methanol, carbon monoxide and water under existence of a catalyst in a carbonyl combination manner; and the adopted catalyst is a composite catalyst system taking palladium acetate as a main catalyst, and metal ions such as cobalt, nickel or ruthenium and the like as a promoter. The method disclosed by the invention has good catalytic activity and selectivity at a low temperature and low pressure; the composite catalyst system has the advantages of low consumption, good selectivity, long service life and the like; carbonyl synthesis of the methyl propionate from the ethylene can be efficiently catalyzed; the reaction result is based on the ethylene; the yield of the methyl propionate is greater than 95%; and the entire method has good commercial value.

The invention provides salt coating liquid. The salt coating liquid is made with, by weight, 0.5-10% of calcium acetate and 90-99.5% of tobacco sheet coating liquid. After treated by a high-temperature process, the calcium acetate in the salt coating liquid is partially decomposed into calcium carbonate which can convert on the surface of the reconstituted tobacco into a great amount of calcium carbonate particles, so that retention rate and distribution uniformity of the calcium carbonate in the reconstituted tobacco can be significantly improved, specific area is greatly increased, a novel microporous structure is generated, water absorbing and moisture preserving performances of the structure are effectively improved, whiteness and flame retention rate of ash from combustion of the reconstituted tobacco can be improved, bulkiness of the reconstituted tobacco is improved, and thickens of the reconstituted tobacco is increased; in terms of smell absorption, tobacco miscellaneous odors can be decreased, irritation is lowered and comfort is improved. In addition, the undecomposed calcium carbonate is hydratable calcium salt with very high hygroscopic property; good moisture preserving effect and certain mould resistance are provided.

The invention discloses a method for preparing a nanofibre membrane, belonging to a technique for preparing a nanofibre compound membrane. The method comprises the following steps: preparing curcuminethanol solution and chitosan acetum, mixing the curcumin ethanol solution and the chitosan acetum by the volume ratio thereof to prepare spinning solution which is injected into an injector of an electrostatic spinning device for electrostatic spinning to form a compound nanofibre membrane and to obtain a curcumin/chitosan nanofibre membrane of antibacterial property, wherein the diameter of thecurcumin/chitosan nanofibre membrane is 200-400 nm. The invention has the advantages that the preparation process is simple, the prepared membrane material heals wound, has broad spectrum bactericidalproperty and has higher bacterial inhibition rate to colibacillus and staphylococcus aureus for 24h.

The invention discloses a method for dissolving chitosan through combined use of acid and alkali. The method comprises the steps of mixing lithium hydroxide, potassium hydroxide, urea and water according to mass percentage, so as to obtain an alkaline aqueous solution; adding a chitosan raw material into an acetic solution or hydrochloric solution, and carrying out stirring dispersion for 20-60 seconds, so as to obtain a chitosan-containing solution; uniformly stirring and mixing the alkaline aqueous solution and the chitosan-containing solution according to the volume ratio of 1: 1, freezing and unfreezing, thereby obtaining a chitosan solution. According to the method, acidic-alkaline solvent systems are used in a combined manner, so that an alkaline system solution of chitosan is obtained, and the degradation of chitosan in an acidic solution is avoided; moreover, the processes of swelling and solvent system pre-cooling are not required, so that the dissolving time is shortened, and the dissolving efficiency is increased.

The invention provides a catalyst for synthesizing ethylene glycol by oxalate hydrogenation, and a preparation method and an application method of the catalyst. The preparation method comprises the steps of taking copper nitrate and copper acetate as copper sources, taking alkaline silica gel as a silicon source, and taking urea and ammonia water as a precipitant; adding a multi-hydroxyl organic matter; and preparing a Cu/SiO2 catalyst with a deposition-precipitation method. According to the method, the dimension and dispersity of copper species are adjusted and controlled by adding the multi-hydroxyl organic matter in the preparation process, and the aggregation of the copper species is inhibited by utilizing carbon deposition, so that the problem of easy sintering of the copper species at a high temperature is better solved. The application method for applying the catalyst to the synthesis of ethylene glycol by oxalate hydrogenation comprises the steps of firstly enabling the organic matter on the catalyst to form the carbon deposition at a relatively high temperature in an inert atmosphere; secondly switching inert gas to hydrogen in a cooling process after carbon deposition formation; and finally when the temperature is reduced to a reaction temperature, performing subsequent hydrogenation synthesis. The method has the characteristics that the catalyst does not need to be pre-roasted before use, and hydrogen pre-reduction does not need to be carried out for a long time, so that the preparation and use costs of the catalyst can be reduced.