25 results about "Propyl acetate" patented technology

The application relates to the technical field of ink solvents, and particularly discloses an environmentally-friendly water-based ink solvent with high drying efficiency and a preparation method thereof, the environmentally-friendly water-based ink solvent with high drying efficiency comprises the following raw materials in parts by weight: 40-60 parts of water, 30-50 parts of a bio-based alcohol compound, 5-15 parts of n-propyl acetate, 0.3-1 part of tripropylene glycol n-butyl ether, 1-3 parts of nano-cellulose, 0.5-1 part of calcium chloride, 1-2 parts of a pH regulator and 0.2-0.4 parts of a chelating agent. The environmentally-friendly water-based ink solvent with high drying efficiency and the preparation method thereof can be used for ink printing, and have the advantages of high drying efficiency and good stability.

The application provides a flavor composition for electronic cigarettes, electronic cigarette liquid and a preparation method thereof. The flavor composition for electronic cigarettes comprises 0.1-0.4 parts of ethyl isovalerate, 2.0-5.0 parts of isoamyl acetate, 0.1-0.6 parts of ethyl butyrate, 0.4-1.6 parts of ethyl acetate, 0.1-0.6 parts of propyl acetate, 0.1-0.6 parts of myric aldehyde, 0.05-0.3 parts of malic acid liquid and 0.02-0.1 parts of acetic acid liquid. By adjusting the ratio of the flavor composition, the application makes the flavor composition have strawberry flavor, can restore the pure fruit pulp aroma of strawberries, has high restoration degree of strawberry flavor, long aftertaste and good stability after high-temperature and high-humidity baking, and can be applied to electronic cigarette liquid, thereby improving the experience of users using electronic cigarettes.

This application discloses a method for producing acetonitrile by amination of acetate, comprising the following steps: in a reactor, acetate, ammonia, and a catalyst are contacted and reacted to obtain acetonitrile; wherein the acetate is selected from at least one of methyl acetate, ethyl acetate, propyl acetate, butyl acetate, and cyclohexyl acetate; the catalyst is composed of a support and alkaline earth metal oxides and alkali metal oxides supported on the surface of the support; wherein the support is selected from at least one of silicon oxide, aluminum oxide, titanium oxide, and zirconium oxide; wherein the alkaline earth metal oxide is selected from at least one of magnesium oxide, calcium oxide, strontium oxide, and barium oxide; wherein the alkali metal oxide is selected from at least one of lithium oxide, sodium oxide, and potassium oxide; wherein the loading of alkaline earth metal oxide in the catalyst is 0.01–10 wt%, the loading of alkali metal oxide is 0.05–5 wt%, and the remainder is the support.

Provided is a slide fastener tape capable of imparting water repellency to a slide fastener using an organic solvent containing no toluene or MEK as a binder, and a slide fastener using such a slide fastener tape. The present invention relates to a slide fastener tape (10) comprising: a base fabric (11) having a first surface (10a) and a second surface (11b); and a water repellent film (12) attached to at least one of the first surface (10a) and the second surface (11b) of the base fabric (11). The water repellent film (12) has a layered structure comprising a skin layer (14) composed of a polyurethane film and a bonding layer (13) disposed between the skin layer (14) and the base fabric (11) and composed of a cured product of a polyurethane-based adhesive. The polyurethane-based adhesive is obtained by dissolving a polyurethane resin in a solvent containing dimethyl carbonate and propyl acetate. A slide fastener (1) of the present invention comprises the slide fastener tape (10).

The invention discloses a polyurethane ink binder suitable for solvent-free compounding as well as a preparation method and application thereof, and belongs to the technical field of polyurethane ink. The problems that in the prior art, intaglio printing polyurethane ink is uneven in solvent-free composite coating, low in composite strength, fuzzy in pattern and the like when applied to solvent-free composite coating are solved. The preparation raw materials of the polyurethane ink binder comprise preparation raw materials of alcohol ester soluble polyurethane resin, ethyl acetate, n-propyl acetate and isopropanol. The alcohol ester soluble polyurethane resin is prepared from the following raw materials: polyol with branching degree of 40-60%, diisocyanate, a branching chain extender, a catalyst, an amine chain extender, an end-capping reagent and a silane coupling agent. The polyurethane ink binder can be applied to solvent-free compounding polyurethane ink, especially flexible package intaglio printing solvent-free compounding polyurethane ink, the stability of the polyurethane ink is guaranteed, the environmental protection property is excellent, the compounding strength is high, the solvent-free colloid solubility resistance is good, the leveling property is good, and the comprehensive performance of the product is excellent.

A secondary battery includes: a positive electrode containing a lithium-nickel composite oxide; a negative electrode containing a lithium-titanium composite oxide; and an electrolyte containing a carboxylic acid ester containing at least one of ethyl acetate, propyl acetate, ethyl propionate, and propyl propionate. In surface analysis of the positive electrode using X-ray photoelectron spectroscopy, a first oxygen spectrum having a peak in a range of a binding energy of 528 eV or more and 531 eV or less, and a second oxygen spectrum having a peak in a range of a binding energy of more than 531 eV and 535 eV or less are detected, and a ratio of an intensity of the first oxygen spectrum to an intensity of the second oxygen spectrum is 0.30 or more and 0.80 or less. In surface analysis of the negative electrode using X-ray photoelectron spectroscopy, a third oxygen spectrum having a peak in a range of a binding energy of 528 eV or more and 531 eV or less, and a fourth oxygen spectrum having a peak in a range of a binding energy of more than 531 eV and 535 eV or less are detected, and a ratio of an intensity of the third oxygen spectrum to an intensity of the fourth oxygen spectrum is 0.82 or more and 1.35 or less.

The invention belongs to the technical field of fermentation engineering, and particularly relates to Wickerhamomyces anomalus JG-WA1 and application thereof in aroma-enhancing fruit wine. A strain of aroma-enhanced Wickerhamomyces anomalus JG-WA1 is screened from distiller's yeast, apple juice is inoculated with the strain for primary fermentation, then saccharomyces cerevisiae is inoculated for secondary fermentation, and the aroma-enhanced fruit wine is prepared. The content of unpleasant odor substances such as acetone, 4-methyl-1-pentanol, 2-butanol, dimethyl disulfide, 3-hexanone and the like with pungent smell of alcohol or mildew odor and the like in the fruit wine is obviously reduced, while the content of 2-pentanol, ethyl propionate, propyl acetate, 3-methyl-2-pentanone, 3-pentene-2-ketone, hexyl hexanoate, ethyl hexanoate, methyl acetate, heptanal, 2-octanone, 2, 3-pentanone, ethyl hexanoate, ethyl hexanoate, methyl acetate, heptanal, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate and ethyl hexanoate is obviously reduced. The content of fruit flavor components such as 2, 3-dimethylpyrazine is greatly increased, the brewed apple wine is obvious in ester flavor and transparent and bright in color, and the flavor quality is obviously improved.

This application discloses a method for producing acetonitrile, comprising the following steps: in a reactor, contacting an acetate, ammonia, and a catalyst to react and obtain acetonitrile; wherein the acetate is selected from at least one of methyl acetate, ethyl acetate, propyl acetate, butyl acetate, and cyclohexyl acetate; wherein the catalyst is composed of a support and a divalent transition metal oxide, an alkaline earth metal oxide, and an alkali metal oxide supported on the surface of the support; wherein the divalent transition metal oxide is selected from at least one of manganese oxide, ferrous oxide, cobalt oxide, nickel oxide, copper oxide, and zinc oxide; wherein the alkaline earth metal oxide is selected from at least one of magnesium oxide, calcium oxide, strontium oxide, and barium oxide; and wherein the alkali metal oxide is selected from at least one of lithium oxide, sodium oxide, and potassium oxide.

The invention discloses a marking substance for wheat mildewing in wine brewing unprocessed grains and a rapid detection method, which are used for rapidly detecting wheat mildewing on the basis of six scientifically screened marking substances including cyclopentanone monomer, ethyl 3-hydroxybutyrate, propyl acetate, tert-butyl alcohol, 2-butanone and nonanal, and providing an accurate basis for judging a wheat mildewing stage. Wine brewing raw grain wheat mildew stage division is realized, and wheat mildew detection accuracy is improved. Based on the early-stage mildew marker substance, early-stage detection of wheat mildew is realized, and the detection sensitivity is enhanced; based on the signal intensity and combination characteristics of the marker substance, determining the main mould types of wheat mildew; besides, the rapid detection of the mildew of the wine-making raw grain wheat is verified by multiple methods, and the similarity calculation, dynamic principal component analysis, clustering heat map analysis and voting method or weighted scoring model of mildew samples at different mildew stages are combined, so that the cross validation of the multiple methods is realized; and the accuracy and reliability of determining the mildew stage and the mold type are improved.

This application discloses a method for producing acetonitrile by reacting acetate with ammonia, comprising the following steps: in a reactor, acetate, ammonia, and a catalyst are contacted and reacted to obtain acetonitrile; the acetate is selected from at least one of methyl acetate, ethyl acetate, propyl acetate, butyl acetate, and cyclohexyl acetate; the catalyst is composed of a support and vanadate and alkali metal oxide of active components supported on the surface of the support; the vanadate is selected from at least one of bismuth vanadate, silver metavanadate, ammonium metavanadate, lithium vanadate, lithium metavanadate, sodium vanadate, sodium metavanadate, potassium vanadate, and potassium metavanadate; the alkali metal oxide is selected from at least one of lithium oxide, sodium oxide, and potassium oxide; the support is selected from at least one of silicon oxide, alumina, and molecular sieve; the mass content of vanadate is 0.1–10 wt%, and the mass content of alkali metal oxide is 0.01–5 wt%.

The application provides a wide-temperature lithium ion battery electrolyte and a lithium ion battery thereof, wherein the lithium ion battery electrolyte comprises a lithium salt, a nonaqueous organic solvent and an additive; the nonaqueous organic solvent comprises a first carbonate, a second carbonate, a third carbonate, a fourth carbonate and a carboxylic acid ester; the first carbonate is dimethyl carbonate and the volume percentage is 39-51%; the second carbonate is propylene carbonate and the volume percentage is 10-15%; the third carbonate is ethylene carbonate and the volume percentage is 8-15%; the fourth carbonate is methyl ethyl carbonate and / or diethyl carbonate and the volume percentage is 8-10%; and the carboxylic acid ester is one or more of propyl acetate, propyl propionate and ethyl propionate and the volume percentage is 19-26%. On the basis of the synergistic effect of dimethyl carbonate and propylene carbonate, the addition of ethylene carbonate, the fourth carbonate and the linear carboxylic acid ester can make the lithium ion battery have better high and low temperature performance.

The invention provides a method for improving the reaction conversion rate of propyl acetate. The method for improving the reaction conversion rate of propyl acetate comprises the following steps: L1, adding propyl alcohol and acetic acid into an esterification tower, and carrying out esterification reaction under the catalysis of a blend of a solid acid catalyst and a filler to obtain crude propyl acetate at the top of the esterification tower; wherein the middle part of the esterification tower is provided with a filler area, and the filler area is filled with a blend of a solid acid catalyst and an inorganic filler; the filler area of the esterification tower is filled with a blend compounded by a solid acid catalyst and an inorganic filler. The preparation method comprises the following steps: firstly, carrying out surface modification on silicon dioxide through KH-560, and introducing an epoxy group; then reacting with polyethyleneimine to form amino-functionalized silicon dioxide; then reacting with amino POSS (Polyhedral Oligomeric Silsesquioxane) and epoxy polystyrene to obtain an intermediate product with a three-dimensional network structure; and finally, sulfonating through chlorosulfonic acid, and introducing a strongly acidic sulfonic acid site.

The utility model relates to the technical field of chemical production and preparation, and discloses an energy-saving and environment-friendly esterification bed for synthesizing n-propyl acetate, which comprises an esterification reaction bed, a spiral steam heating pipe and a reflux spiral pipe are arranged in the esterification reaction bed, and a steam leading-in pipe and a steam leading-out pipe are respectively arranged on two sides of the esterification reaction bed. According to the utility model, the spiral steam heating pipe and the reflux spiral pipe are arranged in the esterification reaction bed, the steam leading-in pipe can lead external high-heat steam into the spiral steam heating pipe, the spiral steam heating pipe is used for high-temperature heating, the steam flows back from the steam leading-out pipe and is led into the reflux spiral pipe, the waste heat is heated, and the waste heat is refluxed and utilized; the driving motor is operated to drive the driving stirring piece to mix and stir, so that the mixing reaction effect of the reaction bed is improved, and the device has waste heat backflow utilization capability, high heat energy utilization efficiency, reduced use cost and good energy-saving and environment-friendly effects.

The present invention relates to a process for the preparation of a compound of formula (II), a stereoisomer, salt, hydrate or solvate thereof, comprising the step of sulfinylating a compound of formula (IV) to produce a compound of formula (II); wherein: R1 and R2 are as defined in the claims; wherein the sulfinylation step is carried out in the presence of a solvent selected from the group consisting of benzene, toluene, ethylbenzene, xylene, chlorobenzene, bromobenzene, fluorobenzene, anisole, nitrobenzene, tetrahydronaphthalene, dichlorobenzene, trimethylbenzene, ethyl acetate, propyl acetate, butyl acetate, propanol, butanol, 2-methyltetrahydrofuran, diethyl ether, methyl tert-butyl ether, cyclopentylmethyl ether, dichloromethane, and tetrachloromethane, pentane, hexane, heptane, cyclohexane, decahydronaphthalene and mixtures thereof.

The invention provides a method for utilizing heat of a propyl acetate recovery tower. The method for utilizing the heat of the propyl acetate recovery tower comprises the following steps: L1, feeding propyl acetate crude ester produced by an esterification tower into a rectifying tower, and purifying to obtain a recovery product and propyl acetate; and L2, the recovery product enters a recovery tower from the top of the recovery tower for recovery treatment, and a gas-phase product at the top of the recovery tower is connected with an esterification tower reboiler through a pipeline and is used for heating the esterification tower reboiler. A high-temperature gas-phase product generated at the top of a recovery tower is used as a heat source of a reboiler of an esterification tower, a heat-conducting coating is arranged on the inner wall of the reboiler of the esterification tower, and graphene and graphene modified by 3-(perfluoro-n-hexyl) epoxypropane, amino POSS and KH560 are introduced as components of the heat-conducting coating. The coating not only has good corrosion resistance, but also greatly improves the heat conduction efficiency of the esterification tower reboiler.

The invention relates to the technical field of esterification reaction catalysis, in particular to a synthesis method of n-propyl acetate, which comprises the following steps: S1, feeding raw materials in an esterification stage into a reactor; s2, stirring and heating, adding an ionic liquid catalyst, and continuously heating; s3, continuously collecting the liquid when the reaction begins to reflow; s4, when the reaction liquid is close to a theoretical value, starting sampling, judging according to the reaction liquid and the kettle liquid gas phase, and when the content of n-propyl ester in the reaction liquid gas phase is greater than 80%, regarding as a reaction endpoint; s5, rectifying and purifying the obtained crude ester phase until the product content is 99.8%; and S6, continuously replenishing the raw materials into the kettle liquid phase to realize continuous reaction production of the n-propyl acetate. By integrating an ionic liquid catalytic esterification technology and an esterification condition control technology, the purposes of environmental friendliness, high catalytic efficiency, high repeated utilization rate, simple separation and high yield are achieved, and continuous production of n-propyl acetate is realized.

The invention provides a method for improving the quality of a propyl acetate rectification finished product. The method for improving the quality of the rectified finished product of propyl acetate comprises the following steps: L1, adding propyl alcohol and acetic acid into an esterification tower, and carrying out esterification reaction under the catalysis of a blend of a solid acid catalyst and an inorganic filler to obtain crude propyl acetate at the top of the esterification tower; l2, crude propyl acetate is output from a discharging port of the esterification tower and then enters a rectifying tower to be purified; wherein the middle part of the esterification tower is provided with an inorganic filler area, and the inorganic filler area is filled with a blend of a solid acid catalyst and an inorganic filler; the catalyst containing a large number of sulfonic acid groups is prepared by adding KH-560 modified silicon dioxide, sequentially reacting with polyethyleneimine and oxidized bamboo fibers and then treating with chlorosulfonic acid.

The invention relates to the technical field of batteries, and discloses a secondary battery and electric equipment.The secondary battery comprises a positive plate, a negative plate, a diaphragm and electrolyte; a positive active material in the positive plate comprises a ternary material; a negative active material in the negative plate comprises a silicon material; the electrolyte comprises a solvent, the solvent comprises a cyclic carbonate solvent and a linear solvent, the linear solvent comprises linear carbonate and linear carboxylic ester, the linear carbonate is selected from diethyl carbonate and / or methyl propyl carbonate, and the linear carboxylic ester is selected from propyl propionate and / or propyl acetate; the mass ratio of the linear solvent in the electrolyte is S3; 5% < = S3 < = 70%; and the mass ratio of the cyclic carbonate solvent in the electrolyte is 10%-40%. Through mutual cooperation of the cyclic carbonate solvent and the specific linear solvent, the problems of high-temperature gas production and lithium ion precipitation at low temperature can be reduced, and the low-temperature safety is improved.

The present invention relates to a process for preparing a compound of formula (I), a stereoisomer, a salt, a hydrate or a solvate thereof, (II) comprising the sulfinulation step of a compound of formula (IV) to produce a compound of Formula (II); (IV) wherein: R1 and R2 are as defined in the claims, wherein said sulfinilation step is carried out in the presence of a solvent selected from the group comprising benzene, toluene, ethylbenzene, xylene, chlorobenzene, bromobenzene, fluorobenzene, anisole, nitrobenzene, tetralin, dichlorobenzene, trimethylbenzene, ethyl acetate, propyl acetate, butyl acetate, propanol, butanol, 2-methyltetrahydrofuran, diethyl ether, methyl tert-butyl ether, cyclopentyl methyl ether, dichloromethane, tetrachloromethane, pentane, hexane, heptane, cyclohexane, decalin and mixtures thereof.

The invention discloses a gel electrolyte precursor solution, the gel electrolyte precursor solution is subjected to photocuring treatment to form a gel electrolyte, the gel electrolyte precursor solution comprises an additive, the additive comprises a photoinitiator, a solvent and a monomer, the photoinitiator comprises TMO ((2, 4, 6-trimethylbenzoyl) bis (p-methylphenyl) phosphine oxide), and the solvent comprises a solvent and a monomer. The solvent is selected from one or more of ethyl acetate, methyl acetate and propyl acetate, and the monomer is selected from one or more of HDA (1, 6-hexanediol diacrylate), DEGDA (diethylene glycol diacrylate) and TPGDA (tripropylene glycol diacrylate). The invention also discloses a gel electrolyte, a gel battery and a preparation method of the gel battery.

The application relates to the field of high polymer materials and discloses a modified glass fiber reinforced nylon resin composition and a preparation method thereof, which comprises the following components: a nylon resin, modified glass fibers and modified multi-walled carbon nanotubes; the modified glass fibers are prepared by grafting a modified silane coupling agent on the surface of the glass fibers; the modified silane coupling agent is prepared by grafting a modifier prepared by reacting a modified intermediate and a DOPO derivative with 3-chloropropyl triethoxysilane; the modified intermediate is prepared by reacting 2-(2,4-dihydroxyphenyl)-2H-benzotriazole and diphenyldichlorosilane; the DOPO derivative is prepared by reacting p-aminobenzoic acid, hydroxybenzaldehyde and DOPO; and the modified multi-walled carbon nanotube is prepared by grafting an antioxidant component prepared by reacting 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propyl acetate and ethylenediamine on the surface of acylchlorinated multi-walled carbon nanotubes; the prepared composition has excellent mechanical properties, flame-retardant properties, heat-oxygen aging resistance and ultraviolet resistance.

The invention relates to a synthesis method of an allyl ether compound. According to the method, 2-methylquinoline or acetophenone derivatives are used as raw materials, a selective fluorine reagent Selectfluor is used as an accelerant, dimethyl sulfoxide and ethyl acetate or propyl acetate are used as a mixed solvent, and the allyl ether or propyl ether series derivatives are synthesized with high yield. The preparation method has the advantages of being low in cost, easy to operate, green, free of pollution and the like, and has potential industrial application prospects. The method provides a green, cheap and convenient way for preparing the allyl ether derivative by using 2-methylquinoline or acetophenone compounds as initiators.

This invention discloses a high-brightness, high-coverage composite optical film, relating to the field of composite optical film technology. The high-brightness, high-coverage composite optical film comprises the following raw materials in parts by weight: 65-80 parts modified polycarbonate, 6-12 parts modified nano-titanium dioxide, 5-10 parts polymethyl methacrylate, 2-6 parts zirconium oxide, 1-3 parts calcium stearate, 0.2-0.8 parts antioxidant 1010, 0.3-0.5 parts antioxidant 168, 0.2-0.4 parts ultraviolet absorber UV-531, and 0.1-0.2 parts... The composite optical film contains the following components: 1 part UV absorber UV-400, 2-4 parts dioctyl terephthalate, 0.5-1.2 parts silane coupling agent KH-550, 0.3-1.0 parts modified nano-barium sulfate, 1-3 parts polyvinyl butyral, 1.5-3.0 parts propylene glycol monomethyl ether, 5-8 parts acrylic resin, 0.2-0.3 parts silane coupling agent KH-570, and 10-15 parts propyl acetate / propylene glycol methyl ether mixed solvent. The raw materials are scientifically formulated, including modified polycarbonate, resulting in both high brightness and high opacity. The key raw materials are modified, exhibiting excellent dispersibility and compatibility. The preparation process is standardized, with precise temperature control, stable performance, and suitability for the needs of the optical field.

The invention discloses a diluted resin glue solution with long-term storage stability as well as a preparation method and a packaging process thereof, and relates to the technical field of resin glue solution preparation. Which comprises the following raw materials: acrylate resin, a chemical stabilizer, a physical stabilizer, a diluting solvent, 1-methoxy-2-propyl acetate, dipropylene glycol dimethyl ether, modified dipropylene glycol methyl ether and triethanolamine. The low-temperature fluidity of the dipropylene glycol monomethyl ether is obviously superior to that of unmodified dipropylene glycol monomethyl ether, so that the viscosity change rate is low after the glue solution is stored for 1 month at 3 DEG C; the anchoring auxiliary function is achieved, hydroxyl in molecules can form weak interaction with hydroxyl on the surface of fumed silica, and stabilization of a three-dimensional network is assisted; the adhesive is completely compatible with bio-based components, resin and other solvents, has no low-temperature precipitation risk, can improve the anti-freezing performance of a composite system, and avoids glue solution failure caused by solvent freezing at extremely low temperature.

The present application relates to the technical field of analytical detection, and particularly relates to a method for determining water content in a propynol system sample by adding an organic solvent, comprising the following steps: (1) taking a to-be-detected layered sample containing water, n-propyl acetate and propynol in a propynol production process; (2) adding an alcohol organic solvent to the to-be-detected layered sample, stirring uniformly, and changing the sample from a water-oil layered state to a uniform clear solution; (3) determining water content in the uniform clear solution obtained in step (2) by using a Karl Fischer method. The present application has the advantages that the method eliminates the interference of water-oil layering on water content determination, improves the accuracy and repeatability of determination, and is suitable for propynol production process control.