121 results about "Dibutyl ether" patented technology

The invention provides a method for continuously producing n-chlorobutane, which belongs to an organic synthesis process. The process consists of reactive distillation stage, an isobutanol recovery stage and a washing distillation stage. The process substitutes hydrogen chloride gas for 30 percent of hydrochloric acid, integrates a reaction stage with a separation stage, adopts an azeotropic water-shift technique, controls the unit consumption needed for producing one ton of 99.5 percent n-chlorobutane to be less than 0.86 ton of isobutanol, 1.8 tons of hydrogen chloride gas, 1.8 tons of steam, 60 kwh or electrical power and less than 0.001 ton of formed COD, reduces 80 percent of sewage discharged during the whole process, and reduces 80 percent of energy consumption. A product obtained by the method contains more than 99.5 percent (weight) of n-chlorobutane, less than 0.02 percent (weight) of isobutanol and less than 0.01 percent (weight) of dibutyl ether.

The invention discloses a nano light absorption composite material and a preparation method thereof, and a coated film preparation method. The nano light absorption composite material comprises an organic main agent, an auxiliary agent and an inorganic functional nano material, wherein the organic main agent is selected from at least one of ethylene glycol, diethylene glycol monobutyl ether, diethylene glycol dibutyl ether, ethylene glycol monoethyl ether acetate, n-butyl acetate, terpilenol, n-butanol and methyl isobutyl ketone; the auxiliary agent includes at least one of dispersant, thickener, flatting agent and defoaming agent; and the inorganic functional nano material is selected from at least one of zinc oxide, zinc sulfide, indium oxide, titanium dioxide, MxO, gallium compounds, cadmium telluride, calcium titanate, perovskite, graphene and nano precious metal. According to the nano light absorption composite material disclosed by the invention, a multilayer efficient antireflection branched structure is constructed on a surface of a textured antireflection layer of a crystalline silicon solar cell piece, so that a solar cell has excellent overall properties such as high incident light absorption, improved short circuit current, good electrical property and the like.

The invention discloses a compound solvent for extracting asphalt from oil sand and an extracting process.The compound solvent comprises a basic solvent and auxiliaries, the basic solvent is 200# solvent oil, and the auxiliaries are butyl acetate, dimethylbenzene, petroleum ether and dibutyl ether.Solvent extraction technology and ultrasonic extraction technology are combined creatively, so that extraction rate is high; the compound solvent can be recycled, normal-temperature technology is adopted for separation process treatment, so that influence on colloid and asphaltene in asphaltic heavy oil is small, and the compound solvent is high in practicability.

The invention relates to a preparation method of low temperature baking disc capacitance electrode silver paste, which comprises the steps that: firstly, 200 model ethyl cellulose, 40 model ethyl cellulose, polyvinyl butyral, diethylene glycol dibutyl ether acetate are mixed to prepare an adhesive; secondly, super fine silver powder, frit and bismuth oxide are mixed to prepare a powder material; thirdly, terpilenol and diethylene butyl alcohol ethylether are mixed to prepare a thinning agent; fourthly, the adhesive and the power material are mixed, the fineness is adjusted through a trio mill, the thinning agent is added, and then the silver paste is prepared. The preparation process is simple, the prepared silver paste can prevent the defects that the silver layer is scratched and deciduous under the low temperature and baking conditions, ensure that the volatilization of the solvent during the low temperature and baking process is uniform, the air bubble is not existent, and the invention is suitable for the electrode solver paste under the high temperature (higher than 300 DEG C) and baking conditions.

The invention relates to the field of preparation of chemical raw materials, and discloses a high-efficiency simple method for preparing dihydroxy dibutyl ether which satisfies the medicinal standard. The method comprises the following steps: condensing 1,3-butanediol at 70-190 DEG C by using 1.0-80 wt% cation exchange resin catalyst as a cation exchange resin catalyst to prepare dihydroxy dibutyl ether; and after the reaction finishes, cooling the reaction solution, filtering, and distilling under reduced pressure to obtain the dihydroxy dibutyl ether of which the content is at least 97%. The product is suitable for producing an active pharmaceutical ingredient of cholagogue Baodanjiansu. The method has the advantages of environmental protection, high efficiency and low cost, and is simple to operate and suitable for industrial large-scale production.

The invention relates to an electrochemical polishing solution for zinc alloy devices and a polishing method thereof, particularly an electrochemical polishing solution for zinc alloy products and a polishing method thereof, belonging to the field of zinc alloy material surface treatment. The electrochemical polishing solution for zinc alloy devices is composed of the following substances in percentage by volume: 10-40% of phosphoric acid, 20-85% of ethylene glycol butyl ether and 5-50% of acetic acid. The polishing solution has the characteristics of low toxicity, high component stability and the like, and can be used for electrochemical polishing of zinc alloy products. The polished zinc alloy product has the advantages of high brightness and smooth surface. The electrochemical polishing solution is free of environmentally harmful components and biologically toxic components, can not introduce toxic substances onto the zinc alloy surface, and is especially suitable for electrochemical polishing of medical zinc alloy instruments. The electrochemical polishing solution has low component volatilization rate, and thus, is beneficial to shortening the polishing solution replacement period.

A catalyst composition, including a titanate of the formula Ti(OR)4 wherein each R is the same or different, and is a hydrocarbon residue; a catalyst additive, wherein the catalyst additive is a dibutyl ether a silicate, a silazane, an aromatic ether, a fluorocarbon, or a combination comprising at least one of the foregoing; and an organic aluminium compound.

Furfural is a known component of both gasoline or diesel fuels as well as a chemical raw material.

We disclose a new production process from cellulose, using as a solvent and catalyst an alkyl imidazole sulphate or chloride or a mixture of both in a reaction with simultaneous extraction, using as a solvent dibuthyl ether.

Furfural and dibuthyl ether are later separated by distillation.

The invention discloses a process method for producing ethylene glycol mono-tert-butyl ether and belongs to the field of process production of chemical products. The production process comprises the following steps: taking common ethylene glycol mono-tert-butyl ether as a raw material, adding a certain proportion of a special entrainer, carrying out azeotropic distillation under certain conditions, and rectifying out impurities, namely ethylene glycol tert-dibutyl ether and water in the ethylene glycol mono-tert-butyl ether, so that the content of the product ethylene glycol mono-tert-butyl ether is greater than or equal to 99.9 percent, the content of the ethylene glycol tert-dibutyl ether is smaller than 500 ppm and the water content is smaller than 100 ppm; the process method can be used for the fields of pharmaceutical intermediates, high-end coatings, high-end electronic cleaning agents and the like. The process has the advantages of simplicity, low energy consumption, high purityof products, environment friendliness and the like; the entrainer is simple in separation and can be recycled; in addition, the process is an advanced production process of the ethylene glycol mono-tert-butyl ether with high quality.

The invention discloses polymethoxy dialkyl ether-type oxygen-containing diesel for a plateau section. The polymethoxy dialkyl ether-type oxygen-containing diesel is characterized by consisting of the following components in percentage by volume: 30%-100% of polymethoxydialkyl ether and 0-70% of diesel, wherein the polymethoxydialkyl ether consists of one or more of polymethoxy dimethyl ether, polymethoxy diethyl ether, polymethoxy dipropyl ether, polymethoxy dibutyl ether, polymethoxy diamyl ether, polymethoxy dihexyl ether, polymethoxy diheptyl ether, polymethoxy dioctyl ether, polymethoxy dinonyl ether, and polymethoxy didecyl ether. According to the polymethoxy dialkyl ether-type oxygen-containing diesel for a plateau section disclosed by the invention, incomplete combustion of the diesel caused by anoxia on the plateau can be effectively relieved, the dynamic performance of a diesel engine can be improved, the emission of exhaust fumes can be greatly reduced, heat load can be reduced, the service life of the engine can be prolonged, the failure rate can be reduced, equipment maintenance costs can be reduced, social and economic benefits are high and practicality is high.

The invention relates to a preparation method of low temperature baking disc capacitance electrode silver paste, which comprises the steps that: firstly, 200 model ethyl cellulose, 40 model ethyl cellulose, polyvinyl butyral, diethylene glycol dibutyl ether acetate are mixed to prepare an adhesive; secondly, super fine silver powder, frit and bismuth oxide are mixed to prepare a powder material; thirdly, terpilenol, butyl glycol ether and cellosolve are mixed to prepare a thinning agent; fourthly, the adhesive and the power material are mixed, the fineness is adjusted through a trio mill, the thinning agent is added, and then the silver paste is prepared. The preparation process is simple, the prepared silver paste can prevent the defects that the silver layer is scratched and deciduous under the low temperature and baking conditions, ensure that the volatilization of the solvent during the low temperature and baking process is uniform, the air bubble is not existent, and the invention is suitable for the electrode solver paste under the low temperature (lower than 250 DEG C) and baking conditions.

The invention relates to a botanical attractant of three kinds of fleahoppers as adelphocoris lineolatus, which is respectively paraxylene, dibutyl ether, butyl acrylate, butyl propionate and butyl butyrate, wherein the butyl acrylate, the butyl propionate or the butyl butyrate has obvious sucking actions on adult insects of the three kinds of fleahoppers, and can be used as a common botanical attractant of the three kinds of the fleahoppers as the potential adelphocoris lineolatus.

The invention relates to a hogwash oil micro-emulsion type cutting fluid, which is prepared from the following raw materials by weight: 2-3 parts of diethanolamine, 6-8 parts of polyvinyl alcohol, 1-2 parts of sodium hydrogen carbonate, 1-2 parts of lauryl alcohol polyoxyethylene ether sodium sulfate, 1-2 parts of sodium hydroxide, 20-23 parts of hogwash oil, 4-5 parts of diethylene glycol dibutyl ether, 12-14 parts of tetrabutyl titanate, 6-8 parts of an auxiliary agent, and 200 parts of water. According to the hogwash oil micro-emulsion type cutting fluid, the tetrabutyl titanate is adopted, such that the viscosity is stable, and no precipitation is generated; the hogwash oil is adopted, such that characteristics of good lubricity and environmental protection are provided; and the hogwash oil micro-emulsion type cutting fluid is the water base cutting fluid, and further has characteristics of rapid cooling, good cleaning performance and good economic benefits.

The invention discloses a method for preparing mycophenolate mofetil, which comprises the following steps of: using dibutyl ether as a solvent, performing complete reaction between MPA and 2-hydroxyethyl morpholine under inert gas protection and constant boiling water conditions so as to obtain a crude product of the mycophenolate mofetil; and using an ionic liquid as a chelating agent to decolor and purify, seeding the mycophenolate mofetil, and crystallizing a mixed solvent to obtain high-purity mycophenolate mofetil. The method has the advantages of short reaction time, high MPM purity, high reaction yield, low generation cost and the like, and has a wide industrial application prospect, and the problem of the color of a final product is solved.

The invention provides a lithium battery electrolyte, which is characterized by comprising a lithium salt, ethylene glycol dibutyl ether, a fluorine-containing organic solvent, a high and low temperature resistant additive and imidazolyl ionic liquid. The lithium battery electrolyte prepared by the invention can form a relatively stable passivation film, and the layer of passivation film is inhibited along with the prolonging of the storage time, so that the storage performance of the lithium battery is remarkably improved, and the storage life of the lithium battery is remarkably prolonged. Meanwhile, the electrolyte has a relatively low freezing point and high-temperature incombustibility, the electrolyte is endowed with very strong flame resistance at the same time, the quick charging performance of the battery can also be enhanced, and the electrolyte can be widely applied to quick-charging lithium batteries.

The invention discloses a novel preparation method for synthesizing dihydroxy dibutyl ether through catalysis of 1,3 butanediol with dry hydrogen resin. The dry hydrogen resin is selected from H type cation exchange resin with the water content lower than or equal to 5%, the resin can be used without regeneration, is simple to treat, has higher catalytic efficiency as compared with wet gel resin in the prior art, has high reuse rate, avoids corrosion caused by sulfuric acid to equipment and is an efficient and environment-friendly catalyst. The process synthesis route is simple, has the mild condition and is an environment-friendly synthesis route prone to industrialization.

The invention discloses a rust inhibiting coating for steel and a preparation method of the rust inhibiting coating. An acrylate emulsion, tannic acid, a phosphorizing liquid, iron oxide red, water, sodium nitrite, aluminum stearate, barium chromate, aluminum triphosphate, butanol, cyclohexanone-oxime, ethylene glycol dibutyl ether, diethanolamine and chlorinated paraffin are weighed, stirred and ground. The coating is flat, bright and light red in appearance, the surface dry time is 30-50 min, and the hard dry time is 1-5 h; the flexibility is 120-140 mm, and the adhesion reaches level 1-2; for the water resistance, the coating does not blister or fall off after soaked in water at 25-35 DEG C for 6-10 d, the impact strength is 550-750 N/cm, and the pencil hardness reaches H.

The invention discloses a preparation method of modified polymethylsilane. The invention relates to the technical field of modification of polymethylsilane. According to the preparation method, dibutyl ether is used as a solvent, various chlorosilanes and metal sodium are subjected to sodium condensation reaction firstly, then allyl magnesium chloride alkylation is used for end capping, and thereby a product with uniform molecular weight distribution and stable properties is obtained. The modified polymethylsilane has the advantages of being liquid at normal temperature, low in viscosity and high in ceramic yield.

The invention discloses an antistatic ceramic material which comprises the following substances in parts by weight: 40-60 parts of zirconium oxide, 2-5 parts of alumina, 3-6 parts of copper oxide, 2-6 parts of quartz sand, 10-25 parts of polypropylene, 4-8 parts of polyethyleneimine, 1-4 parts of 5-carboxyl pyrrolidone, 12-15 parts of dibutyl ether, 4-7 parts of probenazole and 10-20 parts of diethyl phthalate. By adding the multiple chemical components in the ceramic technical process, the prepared ceramic material has the advantages of high wear resistance, high bending strength and favorable antistatic property. The preparation technique has the advantages of simple steps and energy saving.