25 results about "Ethyl propionate" patented technology

The invention relates to the technical field of batteries, in particular to an electrolyte without ethylene carbonate and a battery. The electrolyte comprises fluoroethylene carbonate, diethyl carbonate, propylene carbonate and a compound A, and the compound A is at least one of ethyl propionate and propyl propionate; based on the total mass of the electrolyte, the mass content w1 of the fluoroethylene carbonate is 10-30%; the mass content w5 of the diethyl carbonate is 5%-25%; the content w6 of the propylene carbonate is 5%-28%; the mass content of the compound A is w2, and w2 is 25%-60%; under the condition that the compound A is a combination of ethyl propionate and propyl propionate, the mass content of ethyl propionate is greater than that of propyl propionate; and 1.04 < = w1 / w5 < = 3.5. Comprising the electrolyte provided by the invention is improved in high-temperature stability, dynamic performance and cycle performance.

The utility model relates to the technical field of reaction kettle discloses a reaction kettle of production ethyl propionate, including kettle body, the kettle body top is provided with the kettle cover, the kettle cover inside fixedly connected with the feed pipe, the kettle cover top is provided with the motor, the motor output fixedly connected with the pivot, the pivot side wall is provided with the adjusting mechanism, the pivot outside is provided with the stirring vane, the kettle cover inside fixedly connected with the exhaust pipe, the exhaust pipe top is provided with quick -release mechanism, the adjusting mechanism includes the fixed peg and the recessed hole of opening in the pivot inside, the fixed peg side wall sliding connection is in the recessed hole inside. In the utility model, by pulling the fixed peg, makes the slip ring to drive the stirring vane and moves up and down along the pivot's axial direction, can according to the height of liquid level or the increase of material viscosity in the reaction process, the immersion depth and the action area of stirring vane are adjusted flexibly, not only has optimized the mass transfer heat transfer efficiency, also avoided the problem of local overheating and reaction uneven.

The invention discloses application of a compound to prevention and control of plant pathogenic fungus fusarium oxysporum, and belongs to the technical field of agricultural disease prevention and control. The compound is 3-[1-(1H-benzimidazole-2-yl)-5-hydroxy-3-methyl-1H-pyrazole-4-yl] ethyl propionate. According to the invention, it is found for the first time that the 3-[1-(1H-benzimidazole-2-yl)-5-hydroxy-3-methyl-1H-pyrazole-4-yl] ethyl propionate has a relatively strong inhibition effect on plant pathogenic fungus fusarium oxysporum; experiments show that the compound has a median inhibitory concentration IC50 of 25.2 [mu] g / mL on fusarium oxysporum, and compared with other bactericides, the compound has the advantages of high efficiency, low toxicity and low residue, has better environmental compatibility, and meets the requirements of green plant protection and sustainable agricultural production and the needs of development.

The application discloses a local high-concentration lithium metal battery electrolyte and a preparation method and application thereof. The electrolyte comprises a lithium salt, an organic solvent, an additive and a diluent; the organic solvent comprises at least one of methyl formate, methyl acetate, methyl propionate, methyl butyrate, ethyl propionate, ethyl acetate, ethyl butyrate, methyl trifluoroacetate and ethyl trifluoroacetate; the additive comprises at least one of fluoroethylene carbonate, lithium difluorobisoxalate phosphate and lithium difluorophosphate; and the diluent is a fluorine-containing ether compound. The local high-concentration electrolyte has the advantages of high-voltage resistance of high-concentration electrolyte and inhibition of corrosion of sulfonimide-based electrolyte on aluminum foil, meanwhile, the problems of high viscosity, low conductivity and poor impregnation with a separator of high-concentration electrolyte are overcome, the cycle performance and low-temperature performance of the lithium metal battery are significantly improved, and the local high-concentration electrolyte is particularly suitable for application in a low-temperature high-voltage lithium battery. The preparation method is simple, the cost is low, and the method is suitable for industrial production.

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.

A secondary battery, including a negative electrode plate and an electrolyte, where the negative electrode plate includes a negative electrode active material layer. The negative electrode active material layer includes graphite and a silicon-carbon material, and an average sphericity of the silicon-carbon material is 0.81 to 0.95. The electrolyte includes ethylene carbonate, propylene carbonate, ethyl propionate and propyl propionate, where based on a mass of the electrolyte, a mass percentage of the ethylene carbonate is a %, a mass percentage of the propylene carbonate is b %, a mass percentage of the ethyl propionate is c %, a mass percentage of the propyl propionate is d %, and (a+b) / (c+d) is in a range of 0.23 to 1.51.

This invention provides a method for preparing small-particle-size sulfide solid electrolytes and their applications. Under an inert atmosphere, a sulfide solid electrolyte precursor is mixed with a first solvent and reacted. The first solvent is selected from at least one of ethylenediamine, N,N-dimethylacetamide, and 1,2-ethylenedithiol. The mixture is then further mixed with a second solvent, and stirred to precipitate the sulfide solid electrolyte. The second solvent is selected from at least one of n-hexane, n-heptane, ethyl acetate, ethyl propionate, and N,N-dimethylacetamide. Solvent separation, drying, and heat treatment are then performed. This method synthesizes the sulfide solid electrolyte in the first solvent, which is then directly transferred to the second solvent, allowing the sulfide solid electrolyte to precipitate. Direct solvent separation eliminates the crystallization process, significantly reducing time and costs. The method is simple and efficient, resulting in high purity and high ionic conductivity. The resulting battery exhibits high discharge capacity, excellent cycle performance, rate capability, and limiting current density.

The application discloses a continuous closed-loop cyclic production process for preparing propionic acid ester by taking methanol or dimethyl ether as raw material, and belongs to the technical field of organic synthesis chemical industry. The process comprises the following steps: S1, methyl acetate is hydrogenated to generate mixed alcohol of methanol and ethanol; S2, mixed alcohol is etherified with methanol to generate mixed ether comprising dimethyl ether, diethyl ether and methyl ethyl ether; S3, mixed ether is carbonylated with dimethyl ether and carbon monoxide to generate mixed ester comprising methyl acetate, ethyl acetate, methyl propionate and ethyl propionate; S4, ethyl acetate, methyl propionate and ethyl propionate products are obtained through rectification separation in a plurality of towers in series connection, and methyl acetate is recovered; and S5, the recovered methyl acetate is recycled back to the step S1. By constructing a methyl acetate directional closed-loop cyclic system, the application realizes efficient co-production of propionic acid ester and ethyl acetate, uses solid catalysts in the whole process, avoids strong acid corrosion, has high raw material utilization rate, has mild reaction conditions, can be continuously produced in industry, and effectively solves the problems of high cost, single product and non-recyclable utilization in the prior art.

An electrochemical device includes an electrode assembly and an electrolyte. The electrode assembly includes a negative electrode plate including a negative electrode active material layer. The negative electrode active material layer includes a negative electrode active material; and a negative electrode binder including an ester substance and a non-ester substance. Based on a mass of the negative electrode binder, a mass percentage of the ester substance is x; the electrolyte includes fluoroethylene carbonate and a high-kinetic solvent, the high-kinetic solvent includes at least one of ethyl propionate, propyl propionate, or diethyl carbonate. A ratio of a mass percentage of fluoroethylene carbonate to a mass percentage of the high-kinetic solvent in the electrolyte is y; and 17%≤x+y≤53%, y is from 0.4% to 14%. Based on a mass of the electrolyte, a mass percentage of fluoroethylene carbonate is from 0.1% to 10%.

The application relates to the technical field of edible essence. The application discloses a yogurt essence and a preparation method thereof. The raw material composition of the yogurt essence comprises ethyl maltol, vanillin, butanedione, acetic acid, ethyl acetate, propionic acid, 2,3-pentanedione, 3-hydroxy-2-butanone, butyric acid, ethyl butyrate, isoamyl acetate, methyl thio butyrate, hexanoic acid, ethyl hexanoate, 10% furanone, isoamyl butyrate, ethyl levulinate, linalool, p-cymene, 4-terpinenol, nerol, citral, geraniol, neryl acetate, geranyl acetate, D-limonene, lemon oil, distilled white lemon oil, sweet orange oil, glycerol triacetate, rosemary extract and bitter gourd extract. The yogurt essence prepared by the application has a flavor closer to real yogurt, good thermal stability and good flavor persistence.

This invention provides a lithium-ion secondary battery containing allyl succinic anhydride as an electrolyte additive, which exhibits excellent initial charge efficiency and output characteristics. [Solution] The lithium-ion secondary battery comprises a positive electrode containing a positive electrode active material capable of intercepting and releasing lithium ions, a negative electrode containing a negative electrode active material capable of intercepting and releasing lithium ions, a separator disposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte containing a lithium salt, a non-aqueous solvent, and an electrolyte additive. The negative electrode active material contains natural graphite and artificial graphite, the non-aqueous solvent contains ethylene carbonate, diethyl carbonate, ethyl propionate, and propyl propionate, and the electrolyte additive contains allyl succinic anhydride and dinitrile, with the electrolyte additive containing dinitrile in a proportion of 1.5% by mass or more and 3.2% by mass or less.

The invention discloses a sodium metal battery electrolyte used under high voltage and a preparation method and application thereof, and belongs to the technical field of sodium metal batteries. The sodium metal battery electrolyte comprises sodium salt, cyclic carbonate, chain carbonate and fluorocarboxylate, wherein the concentration of the sodium salt is 0.5-1.5 mol / L, and the mass ratio of the cyclic carbonate to the chain carbonate to the fluoro carboxylic ester is (0.3-0.35): (0.4-0.55): (0.1-0.3); the sodium salt is one of sodium hexafluorophosphate and sodium bis (fluorosulfonyl) imide, the cyclic carbonate is fluoroethylene carbonate, the chain carbonate is ethyl methyl carbonate (EMC), and the fluorocarboxylic ester is one of ethyl 2, 2-trifluoroacetate, methyl 3, 3, 3-trifluoropropionate, ethyl 3, 3, 3-trifluoropropionate, methyl 4, 4, 4-trifluorobutyrate, ethyl 4, 4, 4-trifluorobutyrate and methyl perfluorobutyrate. Through the combined design of fluoroethylene carbonate (FEC), chain carbonate and fluorocarboxylate, an advanced electrolyte system is constructed together, and the electrolyte has excellent performance of high rate performance and long-term cycle stability at the same time under high voltage.

To provide a secondary battery with improved collision characteristics and a battery pack containing the same. To provide a secondary battery with improved adhesion between the separator membrane and the electrode plate and a battery pack containing the same. [Solution] The secondary battery includes a case having an opening; an electrode assembly and electrolyte housed in the case; and a cap-up positioned in the opening. The electrode assembly includes a first electrode plate, a second electrode plate, and a separation membrane located between the first and second electrode plates. The separation membrane includes a substrate and a coating layer located on at least one surface of the substrate. The substrate has a sum of elongation in the mechanical and transverse directions of 200% or less and a sum of tensile strength in the mechanical and transverse directions of 4000 kgf / cm². 2 The following applies: the coating layer includes a binder, the binder includes one or more of aramid resins and acrylic resins, and the electrolyte contains 20% by volume or more of ethyl propionate or ethylene carbonate.

The utility model relates to the technical field of reaction kettle, disclose a reaction kettle with good reaction effect for producing ethyl propionate, including kettle body, the kettle body top is fixedly connected with the feeding cylinder, the kettle body bottom is fixedly connected with the discharge cylinder, the kettle body side wall is fixedly connected with the support frame, the kettle body inside is provided with stirring subassembly, the kettle body top is provided with the crushing subassembly, the stirring subassembly includes propeller and anchor type paddle, the kettle body inside is fixedly connected with the inner bag, the kettle body top is fixedly connected with motor no.

The invention relates to the technical field of batteries, in particular to a battery. The battery comprises a positive plate, a negative plate and electrolyte, the positive plate comprises solid electrolyte particles, and the solid electrolyte particles comprise titanium aluminum lithium phosphate and / or lithium lanthanum titanium oxide; the electrolyte comprises non-fluorinated carboxylic ester, the non-fluorinated carboxylic ester comprises propyl propionate and / or ethyl propionate, and the mass content w1 of the non-fluorinated carboxylic ester in the electrolyte is 20%-55%; the electrolyte further comprises diethyl carbonate, the mass content of the diethyl carbonate in the electrolyte is w2, and w2 / w1 is 0.1-1.2; the electrolyte further comprises a first nitrile additive containing a carbon-carbon unsaturated bond, and the mass content w3 of the first nitrile additive in the electrolyte is 0.01%-3%; the negative plate comprises a silicon carbon material, and the silicon carbon material comprises first silicon carbon with the sphericity degree of 0.85-0.99. According to the battery, the dynamics and high-temperature performance are improved, and the lithium precipitation problem of the battery is solved.

The invention discloses a lemon-flavored powder essence and a preparation method thereof, and the lemon-flavored powder essence comprises a core material and a wall material, the core material is prepared from the following raw materials in parts by weight: 20 to 30 parts of lemon oil, 40 to 50 parts of D-limonene, 2.0 to 4.0 parts of alpha-terpinene, 5.0 to 8.0 parts of gamma-terpinene, 0.4 to 1.2 parts of alpha-pinene, 2.0 to 3.6 parts of beta-pinene, 0.5 to 1.5 parts of linalool, 10 to 12 parts of alpha-terpinol, 0.1 to 0.5 part of nerol, 0.2 to 0.6 part of tetrahydrogeraniol, 1.0 to 3.0 parts of citral, 0.1 to 0.5 part of nonanal, 0.1 to 2 parts of ethyl propionate and 0.1 to 2 parts of terpinyl acetate; the wall material is prepared from the following raw materials in parts by weight: 60 to 79.9 parts of Arabic gum and 20 to 39.9 parts of hydroxypropyl methyl cellulose. A core material of the lemon-flavored powder essence takes lemon oil, terpene compounds such as D-limonene, alcohol compounds such as alpha-terpilenol and aldehyde compounds such as citral as main components, a certain amount of ethyl propionate and terpinyl acetate are introduced, and a wall material takes Arabic gum and hydroxypropyl methyl cellulose as main film forming components. On the basis of highly restoring the pure and full lemon fragrance profile of the lemon-flavored powder essence, the high-temperature storage stability of the lemon-flavored powder essence can also be improved.

The application relates to the field of plant extraction, and particularly discloses a green tea tea polyphenol extraction method, which comprises the following steps: S1, macroporous resin separation is adopted after green tea raw materials are washed with acid water and then eluted with ethanol to prepare tea polyphenol extract; S2, the prepared tea polyphenol extract is first passed through a cellulose column filled with cellulose filler prepared by taking epicatechin as a template agent molecule, then eluted with ethyl propionate to prepare an EC extract; and S3, the tea polyphenol extract after passing through the cellulose column is passed through a modified PCL-PHEMA copolymer resin column containing an ether bond, then eluted with an ethanol solution to prepare an EGCG extract. The application has the characteristics of realizing green tea tea polyphenol extraction and further realizing the separation and extraction of EGCG and EC.

The invention provides a spice composition with fermented fruit juice fragrance, flower fragrance and radix aucklandiae as well as a preparation method and application of the spice composition. The perfume composition is prepared from the following components: 0.15 to 0.35 wt% of ethyl isovalerate, 0.15 to 0.35 wt% of phenethyl acetate, 0.15 to 0.35 wt% of ethyl butyrate, 0.3 to 0.5 wt% of propionic acid, 0.5 to 0.7 wt% of ethyl propionate, 1.5 to 3.0 wt% of nodular pomelo methane, 3.0 to 5.0 wt% of methyl anthranilate, 5.0 to 10.0 wt% of citrus essential oil, 0.2 to 0.4 wt% of ethyl levulinate, 1.0 to 2.0 wt% of ethyl maltol, 0.15 to 0.35 wt% of linfanglilian base, 10.0 to 15.0 wt% of methyl dihydrojasmonate, 10.0 to 15.0 wt% of musk T and 0.15 to 0.35 wt% of ombrox. And the balance of auxiliary spices and / or dispersants and / or stabilizers. The perfume composition realizes delicate construction of aroma levels and precise expression of olfactory images, can be used for daily chemical products and presents a complete aroma framework of front-adjusted fermented fruit juice aroma, middle-adjusted dried petal aroma and tail-adjusted quiet wood aroma.

The application discloses a synthesis method of 2-furanpropionic acid ethyl ester, and belongs to the technical field of synthesis of spices and pharmaceutical intermediates. Furfuryl alcohol and methylsulfonyl chloride are reacted to obtain a methyl sulfonate intermediate, then the methyl sulfonate intermediate is subjected to a bromination reaction to obtain 2-bromomethyl furan; under the action of a strong base, the 2-bromomethyl furan is reacted with ethyl acetate to obtain a product 2-furanpropionic acid ethyl ester. The synthesis method of 2-furanpropionic acid ethyl ester provided by the application is economical in reagents, mild in reaction conditions, safe in reaction process, high in reaction yield (up to 94%) and high in product purity (up to 99%), and is suitable for industrial production.

The application discloses an interface pretreatment liquid for prelithiation of a positive electrode, a lithium supplementing battery and a preparation method thereof, and relates to the technical field of lithium ion batteries.The interface pretreatment liquid comprises one or more of lithium polysulfide, hydrobromic acid and hydriodic acid as solutes, and comprises 0.1-10% of the solutes and 90-99.9% of solvents in percentage by mass.The solvents are one or more of N-methylpyrrolidone, ethylene carbonate, fluoroethylene carbonate, propylene carbonate, butylene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, gamma-butyrolactone, methyl formate, ethyl formate, methyl acetate, ethyl acetate, ethyl propionate, propyl propionate, ethyl butyrate, propyl butyrate, dimethyl sulfoxide and dimethyl sulfide.The interface pretreatment liquid has the advantages of simple preparation method, simple use method, short soaking time of lithium supplementing positive electrode sheets in the interface pretreatment liquid, good effect, high production efficiency and suitability for industrial production.

The invention discloses a lithium iron phosphate battery electrolyte and a preparation method and application thereof. The lithium iron phosphate battery electrolyte comprises a lithium salt, an organic solvent and an additive, the lithium salt is a compound system of lithium bis (fluorosulfonyl) imide (LiFSI) and lithium difluoro (oxalato) borate (LiODFB), the organic solvent is a mixed solvent of ethylene carbonate (EC), methyl ethyl carbonate (EMC) and ethyl propionate (EP), and the additive is fluoroethylene carbonate (FEC) and propylene sulfite (PS). The lithium iron phosphate battery electrolyte integrates low-temperature ionic conductivity, interface stability and wide temperature range performance, and is applied to a lithium iron phosphate battery to remarkably improve the capacity retention ratio and the cycle life of the battery at extremely low temperature.

The present application belongs to the technical field of essence, and particularly relates to a red sour soup essence and application thereof, wherein the red sour soup essence comprises fermented jar spices, cooked tomato spices and chili spices, and further comprises propionic acid, hexanoic acid, octanoic acid, ethyl propionate, litsea cubeba essential oil, garlic essential oil, isovaleric acid, ethyl decanoate, decanal and octyl decanoate glyceride; the fermented jar spices comprise butyric acid, ethyl lactate, guaiacol and benzaldehyde. The red sour soup essence of the present application can be widely applied to red sour soup hot pot, Yunnan-Guizhou-Sichuan-Hunan cuisine and pre-prepared dishes as a food additive, and can be used for enhancing the aroma of products, introducing the unique aroma of red sour soup into other products as an innovation point, producing products with unique flavor and excellent quality, obviously reducing production cost, shortening production process, not being limited by the fermentation time of red sour soup, and ensuring product quality.

The invention discloses a Maotai-flavor liquor flower fragrance reference sample and a preparation method and application thereof, and belongs to the technical field of liquor flavor analysis and quality control. Ten key flower fragrance active compounds such as linalool, trans-nerolidol and phenethyl alcohol are screened out through aroma recombination and deletion experiments, and a narrow flower fragrance reference sample with an ethanol water solution as a solvent is constructed; six non-flower fragrance modification components such as ethyl propionate and n-hexanal derived from natural flowers are further introduced to form a generalized flower fragrance reference sample. The method effectively solves the problem that the evaluation of the fragrance of the Maotai-flavor liquor depends on subjective description for a long time and is lack of a quantitative reference, provides a scientific basis and a practical tool for flavor evaluation, quality control and sensory training of the liquor, and can be used as a core fragrance base to be extensively applied to the field of daily chemical products.

The invention provides a battery and an electrochemical device. The battery comprises a positive plate and an electrolyte, a positive active material in the positive plate comprises lithium cobalt oxide, the lithium cobalt oxide comprises an aluminum element, and in the lithium cobalt oxide, the content of the aluminum element is 500-15000ppm; the electrolyte comprises ethyl propionate and fluorinated nitrile; in the electrolyte, the mass percentage content of ethyl propionate is B%, and the mass percentage content of the fluorinated nitrile compound is C%; wherein B% is 5%-50%, and C% is 0.25%-20%. The battery has excellent high and low temperature cycle performance and high temperature storage performance under high voltage.

The invention discloses a preparation method of 5-methoxy-4, 6-dihydroxypyrimidine, and relates to the technical field of production of 5-methoxy-4, 6-dihydroxypyrimidine. N, N-diethyl-2, 3, 3, 3-tetrafluoropropionamide is subjected to defluorination and methoxylation to obtain 2-methoxy-3-(diethylaminoformyl) ethyl propionate, and the 2-methoxy-3-(diethylaminoformyl) ethyl propionate is subjected to defluorination and methoxylation to obtain 2-methoxy-4, 6-dihydroxypyrimidine. According to the method, 2-methoxy-3-(diethylaminoformyl) ethyl propionate is cyclized to obtain the 5-methoxy-4, 6-dihydroxypyrimidine, the steps are simple, the production cost is low, and the method is suitable for industrial production.