15 results about "Dibutyl ether" patented technology

The invention provides a bio-based 1, 4-butanediol composition as well as a preparation method and application thereof, and the bio-based 1, 4-butanediol composition comprises bio-based 1, 4-butanediol, 4-hydroxybutyric acid-(4-hydroxyl) butyl ester and bis (4-hydroxyl) dibutyl ether. The total mass content of 4-hydroxybutyric acid-(4-hydroxyl) butyl ester and bis (4-hydroxyl) dibutyl ether in the bio-based 1, 4-butanediol composition is 51 to 220 ppm. The bio-based 1, 4-butanediol composition has low hygroscopicity, and can maintain low water content after long-term storage; meanwhile, when the bio-based 1, 4-butanediol composition is used for polyester synthesis, the esterification time can be shortened, the reaction efficiency can be improved, side reactions can be reduced, and a polyester product with better damp-heat resistance stability can be obtained.

The invention relates to the technical field of organic silicon catalysis, and discloses a hydrosilylation reaction catalyst and a preparation method thereof, the catalyst is prepared from a platinum complex catalyst solution, maleic anhydride, triphenyl borate, tetraethoxysilane, propylene carbonate and diethylene glycol dibutyl ether; the preparation method comprises the steps of solvent water removal, electronic relay adduct preassembly, active metal introduction, thermal induction aging and the like. An electron-deficient coordination center is constructed through a step-by-step process, the electron cloud density of the platinum center is reduced by utilizing the Lewis acid characteristic of triphenyl borate, and the solvent cage effect of propylene carbonate is matched, so that the high-temperature tolerance of the catalyst is improved, and the generation of platinum black is effectively inhibited; meanwhile, the solubilizing and bridging effects of diethylene glycol dibutyl ether are utilized, the compatibility problem of a high-polarity component and a non-polar silicone oil matrix is solved, and the obtained catalyst has high activity, high regioselectivity and excellent long-term storage stability.

The present application relates to the field of growth regulators, and specifically discloses a plant growth regulator containing gibberellic acid and a preparation method thereof. A plant growth regulator containing gibberellic acid and a preparation method thereof include the following raw materials in parts by weight: 4-40 parts of gibberellic acid; 1-40 parts of benzylaminopurine; 30-100 parts of ethanol; 60-180 parts of cosolvents; 30-80 parts of surfactants; 5-15 parts of regulating components; 704-750 parts of propylene glycol dibutyl ether. Its preparation method includes the following steps: S1, weighing gibberellic acid, benzylaminopurine, ethanol, cosolvents, surfactants, regulating components and propylene glycol dibutyl ether, mixing them uniformly to obtain a primary mixture; S2, vacuum drying the primary mixture, and obtaining a plant growth regulator after powdering. The present application has the effect of reducing the migration amount of gibberellic acid in the soil.

The present invention relates to the field of inks, specifically to a high-adhesion magnetic ink, its preparation method and application in chip production. The preparation method of the high-adhesion magnetic ink comprises the following steps: first, synthesize sodium carboxyl-terminated hyperbranched polyester, and then load nano-ferroferric oxide thereon to obtain hyperbranched polyester loaded with nano-ferroferric oxide; prepare a silicon-acrylic prepolymer using acrylate compounds, vinyltriethoxysilane, oleic acid, and linoleic acid as monomers, then synthesize a basic alkyd resin, and then compound the basic alkyd resin, the silicon-acrylic prepolymer, the hyperbranched polyester loaded with nano-ferroferric oxide, triethylamine, ethylene glycol dibutyl ether, ethanol, and water to prepare the high-adhesion magnetic ink. The ink can be cured by heating at 130 °C for 10 min, and has the advantages of strong adhesion fastness and good magnetic separation performance, and can be used to mark defective crystal grains, and then the defective crystal grains can be separated by magnetic separation technology.

The invention belongs to the technical field of precious metal extraction, and particularly relates to a synergistic extraction separation method for gold in a high-concentration gold-containing solution, diethylene glycol dibutyl ether, tributyl phosphate and sulfonated kerosene are mixed to obtain a synergistic extraction agent, and the synergistic extraction agent is used for extracting a gold-containing chlorination leaching solution to obtain a gold-containing extraction phase; in the synergistic extractant, the molar ratio of diethylene glycol dibutyl ether to tributyl phosphate is (5-35): 1; in the synergistic extraction agent, the concentration of diethylene glycol dibutyl ether is 0.5 to 3.5 mol / L; according to the method provided by the invention, the extraction agent is selected, and the extraction process parameters such as the ratio of the extraction agent, the ratio of an organic phase to water, the extraction temperature and the extraction stage number are adjusted, so that a good extraction and separation effect on gold can be obtained, and efficient separation of gold in the high-concentration gold-containing solution is realized. The method is good in synergistic effect, good in gold and impurity separation effect and high in efficiency.

The present application relates to a kind of synthesis method of tetramethyl biphenyl diphenol type epoxy resin, belong to epoxy resin preparation technical field.The yield of tetramethyl biphenyl diphenol type epoxy resin synthesized in the present application is greater than 94%, and total chlorine content is less than 240ppm.This is due to the process of two-step reaction in the present application, while adding mixed ether solvent consisting of diethylene glycol dibutyl ether, isobutoxy cyclohexane and triethyl glycerol ether in etherification reaction stage, diethylene glycol dibutyl ether and isobutoxy cyclohexane are slightly soluble in water, triethyl glycerol ether is insoluble in water, but the three solvents have good solubility for epoxy chloropropane and phenolic compounds, the use of three compounds can form transition phase, promote the migration of basic catalyst in aqueous phase to two-phase interface to participate in reaction, promote etherification reaction to proceed stably, avoid the occurrence of side reaction, and then improve product yield and purity, reduce total chlorine content.

The invention belongs to the technical field of benzoate synthesis, and particularly relates to an industrialized preparation method of a benzoate plasticizer, which comprises the following steps: carrying out esterification reaction on polyol, benzoic acid, a catalyst and a water-carrying agent under the condition of reflux condensation to obtain the benzoate plasticizer; the boiling point of the polyol is greater than 180 DEG C; the ratio of the amount of substance of the polyol to the amount of substance of the benzoic acid is (1.150-1.025): 2; the dosage of the polyhydric alcohol is greater than or equal to 1.5 mol, and the dosage of the benzoic acid is greater than or equal to 3 mol; the water-carrying agent comprises ethylene glycol dibutyl ether. Ethylene glycol dibutyl ether is creatively used as a water-carrying agent of the benzoate plasticizer industrial preparation method, so that the chromaticity and hydroxyl value of benzoate plasticizers produced on a large scale can be reduced; meanwhile, the risk of pipeline blockage is further reduced.

The invention discloses a method for preparing bisphenol A dialkyl ether from waste PC using phosphate ester, belonging to the technical field of solid waste recycling. The method comprises: placing crushed waste PC, phosphate ester as an alkylating agent, an alkaline catalyst and a solvent in a reaction kettle to form a reaction system; placing the reaction system at a temperature of 60 to 160° C. under air conditions to carry out a depolymerization reaction for 5 minutes or longer; and cooling the reaction system to room temperature after the reaction is completed to obtain the product bisphenol A dialkyl ether; the phosphate ester as the alkylating agent is selected from trimethyl phosphate, triethyl phosphate, tripropyl phosphate, tributyl phosphate, triallyl phosphate, ethyl dimethylphosphonate, tetramethylmethylenebis(phosphonate) or benzyl dimethylphosphonate. The method has milder reaction conditions and faster reaction speed, and can prepare a variety of products including bisphenol A dimethyl ether, bisphenol A diethyl ether, bisphenol A dipropyl ether, bisphenol A dibutyl ether and bisphenol A diallyl ether.

The invention discloses a preparation method of a water-based UV (ultraviolet) resin composition, which is prepared from the following materials in parts: 5 to 20 parts of photoinitiator-1845, 5 to 20 parts of photoinitiator-TPO (thermoplastic polyolefin), 5 to 20 parts of photoinitiator-8195, 30 to 60 parts of propylene glycol monomethyl ether, 15 to 25 parts of ethylene glycol monobutyl ether, 20 to 40 parts of dipropylene glycol dibutyl ether, 400 to 600 parts of primary coating water-based UV resin, 1 to 5 parts of neutralizer and 3 to 8 parts of wetting agent. The water-based silver paste is prepared from the following components in parts by weight: 20-60 parts of a water-based directional arrangement agent, 2-10 parts of a wetting dispersant, 0-30 parts of matt powder, 30-180 parts of deionized water, 3-10 parts of a rheological thickener, 0-100 parts of water-based silver paste and 1-6 parts of nano copper powder. The water-based UV resin composition prepared by the invention has excellent photocuring speed and curing degree, ensures the stability and consistency of a final product, and meets the requirements of the current society on environmental protection and sustainable development.

The invention relates to the technical field of conductive paste, in particular to conductive paste and application thereof in a solar cell, and the conductive paste comprises conductive powder and an organic carrier; wherein the organic carrier is prepared from hydroxyl-terminated polydimethylsiloxane, hexahydrophthalic acid diglycidyl ester, bisphenol F epoxy resin, an isocyanate curing agent, polyester resin, polyamide wax, butyl carbitol acetate and diethylene glycol dibutyl ether; the conductive paste is characterized in that the organic carrier contains hydroxyl-terminated polydimethylsiloxane; the conductive powder comprises silver-copper powder and silver powder, the silver-copper powder is copper powder with the average particle size of 4-6 microns and the surface coated with 10-15% of silver, and the silver powder is pure silver ball powder with the average particle size of 0.1-1.5 microns; according to the invention, hydroxyl-terminated polydimethylsiloxane with different contents and viscosities is introduced according to the weight components of the basic formula, so that the contact resistance of the conductive paste is reduced.

The invention relates to a synthesis method of tetramethyl biphenol type epoxy resin, and belongs to the technical field of epoxy resin preparation. The yield of the synthesized tetramethyl biphenol type epoxy resin is greater than 94%, and the total chlorine content is less than 240ppm. A two-step reaction process is adopted, a mixed ether solvent consisting of diethylene glycol dibutyl ether, isobutoxycyclohexane and triethyl glyceryl ether is added in an etherification reaction stage, the diethylene glycol dibutyl ether and the isobutoxycyclohexane are slightly soluble in water, the triethyl glyceryl ether is insoluble in water, and the diethylene glycol dibutyl ether, the isobutoxycyclohexane and the triethyl glyceryl ether are not soluble in water. However, the three solvents have good solubility for epoxy chloropropane and phenolic compounds, and the three solvents are compounded for use, so that a transition phase can be formed, a basic catalyst in a water phase can be promoted to more uniformly migrate to a two-phase interface to participate in a reaction, an etherification reaction is promoted to be stably carried out, side reactions are avoided, the yield and purity of a product are further improved, and the total chlorine content is reduced.

This invention belongs to the field of chemical production technology, specifically disclosing a purification method for trimethoxy(pentamethylcyclopentadienyl)titanium, comprising the following steps: vacuum distillation of crude trimethoxy(pentamethylcyclopentadienyl)titanium raw material to obtain a crude distillate; adding 5-20 parts by mass of a modifier to 100 parts by mass of the crude distillate, wherein the modifier is at least one selected from triethylene glycol dibutyl ether, tetraethylene glycol dibutyl ether, n-heptadecane, n-octadecane, and mineral oil, and then distilling to obtain the product. This invention achieves large-scale purification of Star-Ti, achieving a distillation yield of over 75%, with a maximum of over 95%, and obtaining a high-purity product with an organic purity of over 99.5%, solving the problems of difficult large-scale purification, difficulty in purity improvement, and low recovery rate of Star-Ti in existing technologies.

The application relates to the technical field of silicone catalysis, and discloses a hydrosilylation reaction catalyst and a preparation method thereof. The catalyst is made of a platinum complex catalyst solution, maleic anhydride, triphenyl borate, tetraethyl orthosilicate, propylene carbonate and diethylene glycol dibutyl ether; the preparation method involves the steps of solvent dewatering, pre-assembly of an electronic relay adduct, active metal introduction and heat-induced aging. The application constructs an electron-deficient coordination center through a step-by-step process, lowers the electron cloud density of a platinum center by using the Lewis acid property of triphenyl borate, improves the high-temperature resistance of the catalyst by matching the solvent cage effect of propylene carbonate, and effectively inhibits the generation of platinum black; meanwhile, the solubilization bridging effect of diethylene glycol dibutyl ether is used to solve the compatibility problem of high-polarity components and non-polar silicone oil matrix, and the obtained catalyst has high activity, high regioselectivity and excellent long-term storage stability.

The invention discloses a preparation method and application of rare earth metal, and the preparation method comprises the following steps: 1) providing an electrolyte which is a mixture of a polar aprotic solvent and a lithium salt; wherein the polar aprotic solvent is selected from at least one of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, triethylene glycol dimethyl ether and N-methyl pyrrolidone; 2) mixing a rare earth compound with the electrolyte in the step 1) to obtain an electrolyte containing the rare earth compound; (3) electrolyzing the electrolyte containing the rare earth compound under constant potential; and (4) after electrolysis is finished, the cathode piece is taken out, residual electrolyte on the surface of the cathode piece is removed, and rare earth metal on the surface of the cathode piece is collected. According to the preparation method, rare earth metal can be obtained, and no other additives are added in the electrolysis process.

The invention provides an ultralow-thermal-resistance low-temperature welding material, a preparation method and a welding method, and belongs to the technical field of electronic packaging and thermal management materials.The ultralow-thermal-resistance low-temperature welding material comprises, by weight, 70%-85% of tin-bismuth alloy powder, 5%-10% of gallium-based liquid metal and 5%-25% of scaling powder, the tin-bismuth alloy powder comprises tin and bismuth, the gallium-based liquid metal comprises gallium and indium, and the scaling powder comprises the tin-bismuth alloy powder, the gallium-based liquid metal and the scaling powder. The soldering flux comprises modified rosin, dipropylene glycol and diethylene glycol dibutyl ether. The preparation method comprises the following steps: preparing the tin-bismuth alloy powder, the gallium-based liquid metal and the soldering flux, mixing the gallium-based liquid metal with the soldering flux, mechanically stirring, and ultrasonically dispersing until the materials are uniformly mixed; and adding tin-bismuth alloy powder into the mixture, mechanically stirring, and cooling to room temperature. In the welding process, tin and bismuth react with the base material to generate an IMC layer, gallium and indium are filled in a welding cavity in a high-temperature molten state, and a compact IMC interface is generated. The interface thermal resistance is reduced, and the compatibility, the safety and the connection reliability are improved.