50 results about "Ethyl ester" patented technology

The invention relates to a method for preparing solid base catalyst with high specific surface by hybrid composite precursors, belonging to the technical field of preparation of composite metal oxide. The method comprises the following steps of: according to the characteristics of designability in structure and adjustability in laminate composition of laminated composite metal hydroxide, introducing a certain amount of Mg and Al, or Ca, Cu, Co, In and Ga on the laminate, preparing laminated compound, obtaining hybrid composite precursors by hybridization with carbon, then conducting high-temperature roasting on the precursors and obtaining the solid base catalyst of composite metal oxide with high specific surface and mesoporous structure. Due to introduction of the carbon into the precursors, the composite metal oxide obtained by the method has the characteristics of narrow pore size distribution and large specific surface area and the like, and the application of the catalyst in Knoevenagel condensation reaction of benzaldehyde and ethyl cyanoacetate shows good base catalytic activity.

The invention relates to a method for preparing a chloroprene rubber adhesive agent. The current products contain a large amount of methylbenzene and are poisonous. The invention comprises the following steps: firstly adding the chloroprene rubber and chlorinated polyethylene into a mixed solution (the compositions are 120# solvent oil, acetic ether, butanone, acetone and methyl carbonate) and mixing; after being entirely dissolved, filling nitrogen into the reactor; then adding methyl methacrylate and vinyl acetate and heating up to 80-100 DEG C; adding benzoyl peroxide to initiate a polymerization reaction; after 2-3 hours of the polymerization reaction, adding acroleic acid and adding additional benzoyl peroxide to continue reacting for 1-2 hours; after that, stopping the filling of the nitrogen and cooling to 30-50 DEG C; then adding 2,6-ditertiary butyl-p-cresol, mixing and discharging to obtain the chloroprene rubber adhesive agent. Therefore, the chloroprene rubber adhesive agent prepared by the method of the invention is environmental-friendly and has higher bonding strength to EVA soles. The method has the advantages of simple process and can realize large-scale production.

The invention discloses a fresh flower preservative and a preparation method thereof. The fresh flower preservative is prepared from the following components in parts by weight: 70-80 parts of ethanol, 40-50 parts of ethyl pyruvate, 10-20 parts of citric acid, 8-15 parts of sodium citrate, 3-8 parts of sodium thiosulfate, 1-5 parts of stearic acid, 1-5 parts of salicylic acid, 0.5-2 parts of potassium sulphate, 1-5 parts of monopotassium phosphate, 5-10 parts of thiourea and 30-40 parts of water. The preparation method comprises the following steps: mixing ethanol and water, heating to 30-35 DEG C, adding with ethyl pyruvate, stirring for 10-20 min, then adding the other components, stirring for mixing uniformly, cooling to room temperature, and sealing for storage. With the fresh flower preservative, the flowering phase can be prolonged by 15-20 days on average, and meanwhile, fresh flowers with damaged branches, buds and leaves can bloom into bright flowers, so that the utilization ratio of the fresh flowers is greatly improved.

The invention provides water-based matte gloss oil for gravure printing, and a making method thereof, which is characterized in that the water-based matte gloss oil comprises the following in proportion by weight: 20 to 30 percent of the polymer water-based resin fluid, 25 to 35 percent of the water-based synthetic acrylic emulsion, and 15 to 20 percent of the matte slurry, wherein matte slurry consists of mixed liquid of ethanol and ethyl ester with the weight ratio of 6 to 4, and 30 to 35 percent of extinction powder, and the water-based matte gloss oil also comprises the following in proportion by weight: 1 to 3 percent of the water-based defoamer, 5 to 10 percent of the water-based wax paste, 0.5 to 2 percent of the anti-scratch agent, and 8 to 10 percent of the ammonia, ethanolamine, alcohol or ethyl ester. The water-based matte gloss oil has the advantages of thoroughly changing the problem of residual organic matter in printed matter, achieving zero pollution emission in the process of drying the matte gloss oil and reducing harm to operators.

The invention discloses essence of pickled Chinese cabbage and a preparation method and an application thereof. The method comprises the following steps: first, adding 60wt% of edible vegetable oil or glycerol triacetate as a solvent, heating to 60 DEG C, adding 4-hydroxyl-2, 5-dimethyl-3(2H) furanone, acetyl pyrazine, stirring till the components are completely dissolved, and cooling to below 30 DEG C; then, sequentially adding ethyl acetate, ethyl hexanoate, ethyl lactate, butyl caproate, 2-methyl butyric acid hexylester, phenethyl acetate, trans-2-heptenal, phenethyl alcohol, p-ethyl phenol, dimethyl disulfide, acetic acid, propionic acid, butyric acid, 2-methyl butyric acid, garlic oil or galic essential oil, fennel oil or fennel oil resin, ginger oil or ginger essential oil or distilled ginger oil and a pepper extract or pepper essential oil or pepper oil resin; and adding 40wt% of residual edible vegetable oil or glycerol triacetate, uniformly stirring and filling to obtain the essence. The essence of of pickled Chinese cabbage produced by the invention is vivid in frangrance compared with that of common fermented flavor essence, stable in quality, good in temperature resistance and unique in flavor.

The invention relates to a novel method for removing the methyl impurity in the preparation of asenapine. According to the method, asenapine maleate is taken as the raw material, then asenapine maleate is decomposed, the free alkalis and ethyl chloroformate are refluxed in toluene, and the product reacts with hydrobromic acid under reflux to obtain the methyl-free asenapine product. The method has the advantages of high yield and simple and convenient operation.

The invention relates to a method and a device for preparing ethyl methyl carbonate by utilizing a dividing wall reactive distillation tower. The device comprises a dividing wall reactive distillationtower, a condenser positioned on a tower top return pipeline of the dividing wall reactive distillation tower, and a reboiler positioned on a tower bottom return pipeline of the dividing wall reactive distillation tower; a vertical partition plate is arranged in the middle of the dividing wall reactive distillation tower and divides the dividing wall reactive distillation tower into a bottom common stripping section, a middle left pre-separation section, a middle right main tower section and a top common rectification section. An ethyl methyl carbonate product with a high purity can be prepared by the method and device, meanwhile, the energy consumption and the equipment cost are low, high economic benefits can be created, and the market competitiveness of the industry and enterprises isfurther improved.

The invention discloses an antibacterial whitening mouthwash and a preparation method thereof. The antibacterial whitening mouthwash comprises an antibacterial component and a mouthwash matrix component, wherein the antibacterial component comprises 0.05 to 0.5 part of lysozyme, 0.01 to 0.5 part of lauryl arginine ethyl ester hydrochloride, 0.01 to 1 part of dextran anhydrase and 1 to 10 parts ofabelmoschus manihot extract. A substrate component of the mouthwash comprises one or more of an emulsifier, a moisturize, a flavoring, an acid-base conditioner and an essence, and the balance is deionized water. Lysozyme and lauryl arginine ethyl ester hydrochloride are dissolved in a citric acid solution and uniformly stirred; the prepared ingredients are mixed with the emulsifier, moisturizer, flavoring and essence evenly, pH is adjusted, and abelmoschus manihot extract and dextran enzyme are added. The invention makes the synergistic effect between the natural antibacterial agent and the chemical antibacterial agent exist, and the mouthwash produced by the invention has high safety and good antibacterial activity, and can effectively prevent and control the occurrence of dental plaque and oral inflammation.

The invention relates to a photocatalytic self-cleaning coating as well as a preparation method and application thereof, the photocatalytic self-cleaning coating is prepared from a photocatalytic material, a nano SiO2 film forming material, a coating regulator and a solvent, and is characterized by being prepared from the photocatalytic material, the nano SiO2 film forming material, the coating regulator and the solvent, a film layer formed by coating has photocatalytic self-cleaning, anti-reflection and anti-reflection and surface hardening functions; the coating comprises the following components in percentage by mass: 0.2%-2% of a photocatalytic material, 3%-8% of a nano SiO2 film forming material, 0.01%-0.2% of a coating regulator and 90%-95% of a solvent, the photocatalytic material is a composite material of carbon, nitrogen and phosphorus doped nano TiO2 and phosphorus doped active g-C3N4, and is formed by polymerizing and activating a mixture of carbon, nitrogen and phosphorus doped nano TiO2 gel, urea, melamine and phosphoric acid and performing ultrasonic stripping in an ethanol solvent; the nano SiO2 film forming material is acidic hydrosol of methyl silicone resin and tetraethoxysilane. The photocatalytic self-cleaning coating disclosed by the invention can prevent the surface of solar cell glass from being polluted, and the light transmittance and the surface hardness are improved.

The invention relates to a synthetic method for bifenazate. The method comprises the following specific synthetic sections: step 1, performing nitration: mixing a 4-hydroxybiphenyl solution and a toluene solution under stirring for a reaction, and adding a HNO3 solution dropwise for a reaction to obtain a nitration reaction solution; step 2, performing methylation: mixing the nitration reaction solution and anhydrous sodium carbonate powder for a reaction, and adding a dimethyl carbonate solution dropwise for a reaction to obtain a methylation reaction solution; step 3, performing hydrogenation: throwing the methylation reaction solution, hydrogen gas, and Raney nickel into a reaction kettle for a reaction to obtain a hydrogenation reaction liquid; step 4, performing hydrazination: performing a primary hydrazination reaction, performing a secondary hydrazination reaction, performing filter pressing, performing a tertiary hydrazination reaction, and performing secondary filter pressingto obtain a condensation reaction liquid; step 5, performing condensation: mixing a third hydrazine compound, an ethyl acetate solution and an isopropyl chloroformate solution for a reaction to obtaina bifenazate mixed liquid; and step 6, performing purification: performing desolvation, performing crystallization, performing centrifugation, performing washing, performing secondary centrifugation,and performing drying to obtain the finished bifenazate. The method provided by the invention has the effect of improving purity of the bifenazate product.

The invention discloses an additive-free odorless acrylate emulsion with super stain resistance. The emulsion is prepared from the following raw materials in parts by weight: 100-160 parts of water, 10 to 15 parts of methyl methacrylate; 20-30 parts of styrene, 40 to 55 parts of butyl methacrylate, 30 to 45 parts of tert-butyl acrylate, 1 to 6 parts of methacrylic acid, 0.5 to 2 parts of trifluoro-ethyl acrylate, 2 to 10 parts of a functional monomer, 2 to 10 parts of an emulsifier, 0.1 to 0.5 part of persulfate, 0.1 to 0.5 part of an oxidant, 0.1 to 0.5 part of a reducing agent and 2 to 10 parts of a pH regulator. When the acrylate emulsion is used for a coating, an anti-freezing agent does not need to be added, and the acrylate emulsion has the advantages of super stain resistance, low odor, environmental friendliness and the like.

The invention discloses a fuel oil additive mixture, which is composed of the following formula components by mass percentage: 20-50 parts of triethylamine, 30-50 parts of ethylene glycol, 30-50 parts of ethylenediamine, 15-50 parts of acetone, 20-40 parts of ethyl acetate, 30-40 parts of isooctyl nitrate, 20-40 parts of nano-iron oxide, 30-50 parts of glyceryl monooleate, 10-30 parts of palmitic acid, 5-10 parts of carbon tetrachloride, and 10-30 parts of propylene dichloride. The fuel oil additive mixture provided by the invention can clear carbon deposit, clean the fuel oil system, enhance the power performance, improve atomization, save fuel oil, prevent corrosion, prevent rust and lubricate, protect the engine, reduce noise, reduce wear, prolong the engine life, eliminate black smoke, and lower emission.

The invention discloses a rectification device and a process for purifying ethyl difluoroacetate efficiently. The device comprises a light component removal tower, a finished product tower, an intermediate product recovery tower, a first charging pump, a second charging pump, a third charging pump, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a fifth heat exchanger, a sixth heat exchanger, a seventh heat exchanger, an eighth heat exchanger, a first storage tank, a second storage tank, a third storage tank, a fourth storage tank, a fifth storage tank and a sixth storage tank. Bubble point charging is conducted in the light component removal tower, the a fourth heat exchanger starts low-pressure steam, total reflux is conducted at the top of the tower, intermediate bodies are collected when the temperature of the top of the tower reaches 45-50 DEG C, then the second charging pump is started, and charging is conducted in the finished product tower. The sixth heat exchanger starts the low-pressure steam, total reflux is conducted at the top of the tower when condensate is distilled out of the top of the finished product tower, finished products of the ethyl difluoroacetate are collected when the temperature of the top of the tower reaches 98-99 DEG C, and the content is in a range of 99.95-99.98%. By the aid of the device and the process, high-purity ethyl difluoroacetate products can be obtained, the process is simple, and industrial production requirements can be met.

The invention provides a method for extracting ethyl vanillate from peony. According to the method, peony petals are used as a raw material. Through heating reflux, an active component containing ethyl vanillate are extracted from peony petals; and through extraction, macroporous resin column chromatography, silica gel column chromatography and recrystallization, ethyl vanillate is obtained. By the method for extracting ethyl vanillate from peony, ethyl vanillate with high purity can be obtained, and the purity can reach 95% and above. During the extraction process of ethyl vanillate, medicines used in the process are all common medicines, and production cost is low. Meanwhile, organic solvents such as ethanol and macroporous resin in the chromatographic column can be repeatedly used. Thus, the environment is not polluted, and production cost is further reduced. The method of the invention is suitable for large-scale promotion and application. The ethyl vanillate obtained by the method has stronger activity than orlistat and can be applied in preparation of diet pills or a medicine with inhibitory effect on lipase activity.

The invention belongs to the natural drug chemical field, and is characterized in that: grinding Xizang rhizoma picrorhizae medicinal materials, adding 75%-95% of ethanol with an amount of 16-20 times for refluxing and extracting for 2-3 times, recycling ethanol from an extracting liquid with lowered pressure, extracting a concentrated liquid with ethyl acetate, taking an organic layer, and recycling ethyl acetate for concentration. The volume is concentrated until sticky dipped using a glass rod, then it is placed at the condition of -10 DEG C to -5 DEG C for 24 hours, crystal is precipitated, and filtered, the crystal solid is refluxed and dissolved by adding 95% of ethanol, then standing for crystal precipitation, and then filtering to obtain the cucurbitacine B. According to the method provided by the invention, the process prepareing the cucurbitacine B is simple in process, low in cost, high in yield and productive rate, and suitable for industrial large-scale preparation.

The invention relates to a synthesis method of a low-sensitivity polycarboxylic acid mother liquor, which comprises the following steps: (1) solution preparation: preparing a kettle bottom solution byadding water into a reaction kettle, starting the reaction kettle, stirring, and adding a polycarboxylic acid macromonomer EPEG3000 and acrylic acid I, preparing a solution I by dissolving acrylic acid II, hydroxyethyl acrylate and methyl acrylate into water, and preparing a solution II by dissolving a reducing agent and a chain transfer agent into water; and (2) adding an oxidizing agent into the kettle bottom solution, uniformly stirring, starting to dropwise add the solution II at a constant speed, dropwise adding the solution I after 0-5 minutes, and controlling the time when the solutionII is completely dropwise added to be 10-30 minutes later than the time when the solution I is completely dropwise added, performing curing for 30-90min, releasing cooling water for cooling in the reaction process to control the temperature to be lower than 30 DEG C, adding alkali for adjusting, and uniformly mixing to obtain the low-sensitivity polycarboxylic acid mother liquor. According to theinvention, the polycarboxylic acid macromonomer EPEG3000 is adopted to synthesize a polymer with a low acid-ether ratio under a low-temperature condition, and the acrylate is introduced in the process, so that the prepared polycarboxylic acid mother liquor has the characteristics of moderate water reducing rate and slump retaining property, and the problem of high sensitivity of the common carboxylic acid mother liquor is solved.

The invention discloses a derivative based on rhodamine B and a preparation method and application thereof. The preparation method of the derivative comprises the following steps: under nitrogen protection, adding a dichloromethane solution of D-sphingol into an acetonitrile solution of N-ethyl p-toluenesulfonate of rhodamine B; in the presence of dried potassium carbonate, heating the solution tocarry out a reflux reaction to prepare a coarse product; and concentrating the coarse product and carrying out silicagel column separation to obtain a pure product. A pH titrating experiment verifiesthat in a DMSO/BR(1/99, v/v) system, the derivative does not give out fluorescence in a neutral condition, and the fluorescence intensity at 600 nm is enhanced gradually as the pH is reduced from 7.4to 2.0. The pKa value is 4.32, the pH response range is 2.0-7.4, and a golgiosome weak acidic environment is detected favorably. In addition, a probe has good selectivity, water solubility and low toxicity. An intracellular co-positioning experiment and a golgiosome pH adjusting experiment verify that the derivative can mark the golgiosome specifically in a targeted manner and can detect the pH change of the golgiosome with high sensitivity.

The invention discloses a flame-retardant finish paint for furniture. The flame-retardant finish paint comprises a main agent, a curing agent and a diluent, wherein the main agent comprises the following raw material components in parts by weight: 30-38 parts of amino resin, 24-32 parts of acrylic resin, 12-18 parts of vinyl acetate, 0.2-0.6 part of a defoaming agent, 2-5 parts of a flame retardant, 0.4-0.9 part of a dispersant and 0.2-0.4 part of a thixotropic agent; the curing agent comprises the following raw material components in parts by weight: 25-32 parts of a toluene diisocyanate trimer, 14-20 parts of imidodicarbonic acid diamide, and 8-15 parts of butyl acetate; the diluent comprises the following raw material components in parts by weight: 20-27 parts of ethanol, 5-9 parts of paraffin oil, and 32-40 parts of ethyl acetate; and a mass ratio of the main agent, the curing agent and the diluent is 1:(0.25-0.4):(0.55-0.65). The invention provides the flame-retardant finish paintfor furniture which has the following beneficial effects: the finish paint is applied to timber furniture, has very excellent flame-retardant performance, does not contain toxic organic volatiles, belongs to an environment-friendly coating, and is high in impact resistance and excellent in overall performance.

The invention relates to the new applications of an annonaceous acetogenins compound V, in particular to the applications of the compound V for preparing an anti-cancer drug. Annonaceous acetogenins is extracted from the scratch stock of a custard apple seed with organic solvent, including ethanol, petroleum ether, ethyl acetate and chloroform, etc.; the annonaceous acetogenins is processed by silicagel column chromatography and eluted with chloroform-methanol, petroleum ether-ethyl acetate and ethyl-acetate-methanol; and the annonaceous acetogenins compound V is made. The content of the annonaceous acetogenins compound V is 50 to 90 percent of mass fraction. An endozoic anti-cancer pharmacological test shows that the annonaceous acetogenins compound V has a significant effect on inhibiting the growth of the cancer cells of a lung, a breast and a liver and the anti-cancer activity of the annonaceous acetogenins compound V is higher than chemo-treatment 5-S-Fu, so the annonaceous acetogenins compound V can be used for preparing the anti-cancer drug.

The invention relates to a phase-change material, and especially relates to an inorganic phase-change constant-temperature material and a preparation method thereof. The inorganic phase-change constant-temperature material comprises calcium chloride hexahydrate, strontium chloride hexahydrate, sodium chloride, acrylic acid, glycerol, hydroxyethyl methacrylate, maleic anhydride, sodium carboxymethyl cellulose, boric acid and expanded graphite, wherein the total amount of the boric acid and the expanded graphite is 2-12% of the total amount of the inorganic phase-change constant-temperature material; and a mass ratio of the boric acid to the expanded graphite is (1-6):(1-6). The phase-change temperature of the inorganic phase-change constant-temperature material is 26 DEG C, the supercoolingdegree is 0.3 DEG C, the phase-change latent heat is not lower than 236 KJ/Kg, the phase-change process is reversible, and the material can be recycled for not lower than 10000 times; and in addition, the situation of thermal physical property degradation does not exist in the circulation process, and leakage from a base body is not prone to happening.