235 results about "Ethyl propionate" patented technology

An environmentally clean dual fuel for an internal combustion engine, comprising acetylene as a primary fuel and a combustible fuel, such as one or more fluids selected from an alcohol such as ethanol, methanol or any other alcohol or alcohols from the group comprising C1-C20 carbon chains, ethers such as from the group comprising dimethyl ether, diethyl ether, methyl t-butyl ether, ethyl t-butyl ether, t-amyl methyl ether, di-isopropyl ether and the like, low-molecular-weight esters such as from the group comprising methyl formate, methyl acetate, ethyl acetate, methyl propionate, ethyl propionate and the like, or other suitable combustible fluid such as mineral spirits and the like, as a secondary fuel for operatively preventing early ignition and knock arising from the primary fuel. The dual fuel, internal combustion system, which generally utilizes a two-stage process for start-up and operation and can be operated with air- or liquid-cooling, is environmentally clean with hydrocarbon, CO, NOx, and SOx emissions substantially eliminated.

There is provided in one embodiment of the invention an electrolyte for use in a lithium ion electrochemical cell. The electrolyte comprises a mixture of an ethylene carbonate (EC), an ethyl methyl carbonate (EMC), an ester cosolvent, and a lithium salt. The ester cosolvent comprises methyl propionate (MP), ethyl propionate (EP), methyl butyrate (MB), ethyl butyrate (EB), propyl butyrate (PB), or butyl butyrate (BB). The electrochemical cell operates in a temperature range of from about −60 degrees Celsius to about 60 degrees Celsius. In another embodiment there is provided a lithium ion electrochemical cell using the electrolyte of the invention.

A lithium secondary battery has a cathode made of carbon material capable of occluding or emitting a lithium ion, a cathode made of lithium-contained oxide, and a non-aqueous electrolyte. The non-aqueous electrolyte includes a lithium salt containing LiPF6 and LiBF4; and a non-linear carbonate-based mixed organic solvent in which (a) a cyclic carbonate having ethylene carbonate or a mixture of ethylene carbonate and propylene carbonate and (b) a propionate-based ester such as ethyl propionate are mixed at a volume ratio (a:b) in the range from about 10:90 to about 70:30. This lithium secondary battery ensures excellent high-rate charging / discharging characteristics and improved life cycle and low-temperature discharging characteristics since it includes a predetermined mixed organic solvent not including a linear carbonate. Also, since gas generation is restrained at a high temperature, a battery set may be mounted in a more improved way.

An internal combustion engine adapted to use an environmentally clean multi-fuel composition, comprising acetylene as a primary fuel and a combustible fuel, such as one or more fluids selected from an alcohol such as ethanol, methanol or any other alcohol or alcohols from the group comprising C1-C12 carbon chains, ethers such as from the group comprising dimethyl ether, diethyl ether, methyl t-butyl ether, ethyl t-butyl ether, t-amyl methyl ether, di-isopropyl ether and the like, low-molecular-weight esters such as from the group comprising methyl formate, methyl acetate, ethyl acetate, methyl propionate, ethyl propionate, ethyl malate, butyl malate, and the like, or other suitable combustible fluid such as mineral spirits and the like, as a secondary fuel for operatively preventing early ignition and knock arising from the primary fuel.

The invention belongs to the field of lithium batteries, in particular to a low-temperature lithium ion battery. The positive electrode sheet comprises a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer comprises 4.4 V lithium cobaltate material, a positive electrode conductive agent and a positive electrode binder. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer comprises a hard carbon coatedsecondary particle artificial graphite material, a negative electrode conductive agent, a dispersant and a negative electrode binder. The electrolyte comprises 10-20% of lithium hexafluorophosphate,10-20% of ethyl propionate, 10-20% of diethyl carbonate, 15-30% of vinyl carbonate, 15-30% of propyl propionate, 3-10% of fluorovinyl carbonate, 2-3% of propylene sulfite, 0.5-2.5% of ethylene glycolmonobutyl ether and 0.5-2.5% of 2, 2'-dithiopyridine. Compared with the batteries in the prior art, the lithium ion battery has good charging and discharging performance and higher energy density under low temperature condition.

The invention discloses lithium ion battery electrolyte and a lithium ion battery. The lithium ion battery electrolyte is prepared from 11 to 17 weight percent of lithium salt, 3 to 11 weight percent of a functional additive and 78 to 85 weight percent of an organic solvent, wherein the functional additive comprises an anode protection additive, a film forming additive and a low-resistance additive; furthermore, the organic solvent is selected from one or more of ethylene carbonate, propylene carbonate, ethyl propionate, propyl propionate, ethyl methyl carbonate and diethyl carbonate. The lithium ion battery electrolyte disclosed by the invention is high-voltage and high-temperature-resistant rate type lithium ion battery electrolyte, and can meet the high-current discharge cycle performance of a high-voltage lithium ion battery and also meet a storage performance requirement under a high-temperature condition.

The invention belongs to the technical field of chemical synthesis, and in particular relates to a method for preparing 3-ethoxy ethyl propionate. The method comprises a synthesizing step and a refining step, wherein the synthesizing step adopts ethanol and ethyl acrylate as raw materials to carry out addition under the action of a catalyst, and the catalyst adopts alkali metal or alkali alcoholate. The method has the following advantages: 1, the method adopts one of the raw materials as solvent to react, so as to reduce solvent recovery and consumption in the production process; 2, the reaction catalyst uses basic catalyst such as sodium metal and the like, so as to improve reaction yield greatly; 3, the dosage of the reaction catalyst is reduced to about 2 percent, so as to lower amount of salt greatly after the reaction is finished, and reduce byproducts; 4, the reaction time can be shortened to 3 hours, so as to improve production efficiency; and 5, fore zeolite obtained in distillation can be used for next reaction, so as to achieve circular application, so that the proposal reaches green chemical requirement.

The invention discloses an aspergillus oryzae lipase, an encoding gene, a vector, an engineering bacterium and application thereof. Amino acid sequences of the aspergillus oryzae lipase are shown as SEQ ID NO.1. (R, S)-2-(4-hydroxy phenoxy) ethyl propionate can be catalytically resolved by the aid of recombinant Escherichia coli or a recombinant lapse which is used as a biocatalyst, so that (R)-2-(4-hydroxy phenoxy) ethyl propionate can be generated. As shown by results, the aspergillus oryzae lipase, the encoding gene, the vector, the engineering bacterium and the application have the advantages that the (R, S)-2-(4-hydroxy phenoxy) ethyl propionate can be efficiently catalytically resolved by the aid of the recombinant Escherichia coli, and the optical purity of reacted products can reach 99% at least; the lipase gene engineering bacterium is efficiently expressed, and accordingly the application cost of biocatalysts to (R, S)-2-(4-hydroxy phenoxy) ethyl propionate resolution reaction can be reduced to a great extent.

The invention discloses an application of a rhodamine B based fluorescence sensor which can specifically detect tin ions. According to the application, benzyl 3-(3', 6'-bis(diethyl amino)-3-oxo-spiro [isoindoline-1, 9'-xanthene]-2-yl) ethyl propionate is taken as a substrate, different heavy metal ions such as MgCl2*6H2O, SnCl2*H2O, CrCl3*6H2O, AgNO3, CaCl2, NaCl, PbCl2, KCl, MnCl2*4H2O, ZnCl2, CuCl2*2H2O, LiCl*H2O, Ba(NO3)2, HgCl2, CoCl2, FeCl2*4H2O, FeCl3*6H2O, CdCl2*2.5H2O, AlCl3 and the like are added, and fluorescent response is found only when SnCl2*H2O is added, so that the fluorescence sensor which can specifically detect tin ions is developed. The sensor has the advantages of high specificity and sensitivity and the like and has important application potentials in the aspects of disease diagnosis and health evaluation.

The invention discloses a lactic acid-tolerant ester-producing pichia pastoris, and belongs to the technical field of a bioengineering technology and a brewing biotechnology. The strain is preserved at the General Microbiology Center of the China Committee for Culture Collection of Microorganisms on April 24, 2017, the classification is named pichia kudriavzevii (Pichia kudriavzevii) and the preservation number is CGMCC No.14068. The pichia pastoris is high in environmental tolerance, is capable of tolerating 0-15% lactic acid, is capable of metabolizing to generate multiple ethyl ester volatile flavor substances, such as ethyl acetate, ethyl propionate, ethyl caprylate, phenethyl acetate and ethyl phenylacetate in the environment of 0-12% lactic acid, and is a brewing functional strain with excellent performance.

The invention provides application of modified calcium carbonate in plastics. The plastics are prepared from the following raw materials in parts by weight: 3 to 5 parts of modified calcium carbonate, 1 to 3 parts of ethyl propionate, 4 to 6 parts of glass fibers, 40 to 50 parts of polycarbonate, 0.5 to 1 part of alunite, and 0.5 to 1 part of cross-linking agent. The modified calcium carbonate provided by the invention is added in the production process of the plastics, and the prepared plastics have good tensile strength, elongation at break, bending strength and brinell hardness, and high thermal deformation temperature.

The invention discloses a method for promoting aging of fruit-type white spirit under actions of infrared assisted ultrasonic and a pulse electric field, which comprises the following steps: fermenting full fruit juice, distilling to obtain fruit-type white spirit, treating under the actions of infrared rays and ultrasonic for 5-15 minutes while controlling the temperature at 40-60 DEG C, ultrafiltering with an ultrafiltration membrane with the pore size of 0.02-0.05 mu m to obtain an ultrafiltrate, treating the ultrafiltrate under the action of a pulse electric field with the electric field intensity of 30-50 kV / cm, quickly cooling the liquor subjected to electric field treatment to 0-5 DEG C, keeping for 12-20 hours, and heating to normal temperature to obtain the fruit-type white spirit with soft mouthfeel. The fruit-type white spirit treated by the method has typical fruit odor and soft and thick mouthfeel; and the content of ethyl acetate, ethyl propionate, ethyl lactate, ethyl laurate, phenethyl alcohol and other aroma substances is enhanced by 50-70% as compared with the untreated white spirit, the heady fusel oil component is reduced by 40-60%, and all the components are close to the indexes of the 5-year-aged white spirit. The method has the advantages of time saving, labor saving and low cost.

The resist according to the present invention includes any one of tetrachloromethyl tetramethoxycalix [4] arene and trichloromethyl tetramethoxycalix [4] arene. The resist including such kind of components is soluble in the solvent having less effect to worsen a working environment, namely, ethyl lactate (EL), propylene glycol monomethyl ether (PGME), propylene glycol monomethyl ether acetate (PGMEA), ethyl propionate, n-butyl acetate and 2-heptanone. It can be developed by tetra-methyl ammonium hydroxide in addition to the above mentioned solvent. By exposing this resist by electronic ray, high resolution of 8 nm is attained, and by using this resist as a mask, various materials can be formed into a hyperfine shape. According to such kind of resist, a photosensitive resist material which has high resolution and solvable to solvents having less effect to worsen the working environment and can be developed by the solvents, a exposure method using it, and a hyperfine processing method using it are provided.

The invention discloses pear essence. The pear essence mainly comprises the following components: 95-97.5% of ethyl alcohol, 0.5-1% of ethyl butyrate, 0.2-0.7% of ethyl acetate, 0.2-0.7% of ethyl propionate, 0.1-0.5% of ethyl-2-methyl butyrate, 0.1-0.5% of butyl acetate, 0.1-0.6% of isoamyl acetate, 0.1-0.5% of ethyl hexanoate, 0.1-0.5% of hexenyl acetate and 0.1-0.7% of methyl 3-methylthiopropionate. Accordingly, the invention also discloses a preparation method of the pear essence. The preparation method of the pear essence comprises the steps of sequentially adding main ingredients of the pear essence in proportion, uniformly mixing and ripening, thus the pear essence product is obtained. By adopting the preparation method of the pear essence, the pear essence has strong fruit juice taste and sufficient characteristic fragrance and can reserve natural flavour of natural pear juice; the pear essence belongs to a beverage product, and reality, smoothness and fragrance of beverage taste can be obviously enhanced.

The invention discloses a novel esterase as well as a coding gene and an application of esterase. The esterase EST04211 has an amino acid sequence shown in SEQ ID NO. 2. The amino acid sequence of the gene of the esterase EST04211 is shown in SEQ ID NO. 1. The novel esterase disclosed by the invention is obtained by cloning Bacillus SCSIO15121 derived from deep sea of the Indian Ocean. The esterase has the largest characteristic that the esterification rate is 97% in catalytic synthesis of ethyl isobutyrate, and under similar conditions, the esterase can also catalyze propionic acid, butyric acid, valeric acid, caproic acid and ethanol, propanol, butanol, pentanol and hexanol to synthesize corresponding short-chain aromatic ester flavors, such as ethyl propionate, propyl propionate and butyl propionate, the esterification rate mostly reaches 85%-95%. The esterase can be applied in the industrial bio-manufacturing of the short-chain aromatic flavors, such as ethyl isobutyrate and the ester flavors are high in quality, belongs to natural products and can be applied in production industries, such as foods, cigarettes and daily chemical products.

The invention discloses a lithium ion battery with adoption of secondary electrolyte injection, comprising a positive pole, a negative pole, a diaphragm, an electrolyte and an outer package. In the process of manufacturing the battery, the secondary electrolyte injection is adopted; the electrolyte solvent in the first electrolyte injection is one or a combination of more than one of EC (ethylene carbonate), PC (propylene carbonate), DMC (dimethyl carbonate), DEC (diethyl carbonate), EMC (ethyl methyl carbonate), Gamma-BL (butyrolactone), MF (methyl formate), MA (methyl acetate), EP (ethyl propionate) and THF (tetrahydrofuran) and does not contain acetonitrile and propionitrile; the secondary electrolyte injection is conducted after the formation; and the used electrolyte in the secondary electrolyte injection contains at least one of the acetonitrile and the propionitrile. The electrolyte containing the at least one of the acetonitrile and the propionitrile has the advantage of high normal-temperature conductivity (10-50mS / cm) and low-temperature conductivity (4-20mS / cm at the temperature of -20 DEG C), thereby exceeding the level of an existing electrolyte.

Disclosed are an electrolyte for lithium secondary batteries including 10 to 50% by weight of a cyclic carbonate compound, and 50 to 90% by weight of a linear ester compound, based on the total weight of a non-aqueous solvent, wherein a content of ethyl propionate of the linear ester compound is 20 to 60% by weight, based on the total weight of the non-aqueous solvent, and a lithium secondary battery including the electrolyte and exhibiting superior low-temperature characteristics.

The invention discloses the formula of tobacco additive essence of a hami melon fragrance, which comprises the following components in percentage by mass: 0.01 to 0.05 percent of palmitic acid, 0.01 to 0.05 percent of benzoic acid, 0.05 to 0.2 percent of ethyl maltol, 0.1 to 0.2 percent of Yunyan essence, 1 to 5 percent of Virginia tobacco extract, 0.01 to 0.05 percent of beta ionone, 0.5 to 1 percent of ethyl acetate, 0.001 to 0.01 percent of gamma-heptalactone, 0.1 to 0.8 percent of menthyl acetate, 0.1 to 0.8 percent of ethyl propionate, 0.1 to 1 percent of Yunyan absolute oil, 0.5 to 2 percent of hami melon extract, 0.01 to 0.1 percent of dihydrocoumarin, 1 to 10 percent of sorbierite, 1 to 5 percent of edible alcohol and 80 to 90 percent of propylene glycol. In the formula of tobaccoadditive essence of the hami melon fragrance, the addition of the hami melon extract offers a hami melon fragrance to the tobacco, improves the fragrance of the tobacco and corrects smoke smell, so the smoke smell of the tobacco is improved, the nature sweet fragrance of the tobacco is improved, the dry, harsh and bitter mouthfeel of users is improved, and requirements of the users are met.

The invention relates to a preparation method for synthesizing propionic acid by carbonylation. In the method, ethanol or ethanol derivatives serving as raw materials and a liquid reaction composition are carbonylated to synthesize the propionic acid, wherein the reaction temperature is between 140 and 220 DEG C; the reaction pressure is between 2.0 and 8.0 MPa; the liquid reaction composition comprises rhodium or iridium serving as a main catalyst, iodoethane serving as a cocatalyst, ethyl propionate, the propionic acid, water, and a first iodide and a second iodide serving as accelerants. Due to the addition of the two iodides, the stability of a catalyst and the catalytic activity for synthesizing the propionic acid by the carbonylation of the ethanol can be further improved.

The invention provides a fast-charging lithium-ion battery. An anode active material is graphite coated with soft carbon. The solute of an electrolyte is lithium hexafluorophosphate. An organic solvent contains ethylene carbonate, propylene carbonate, ethyl propionate, and polypropylene. The lithium-ion battery provided by the invention supports 2C rate cycle, has the advantages of long cycle lifeand stable performance, and can be cycled and used 900 times at the 2C / 1C charge and discharge rate, and the battery capacity can still be maintained above 87%.

The invention discloses a lithium ion battery and an electrolyte solution thereof. The electrolyte solution comprises an electrolyte solution solvent, an electrolyte and an additive, wherein the electrolyte solution solvent comprises EC (ethylene carbonate), DEC (Diethyl Carbonate), DMC (Dimethyl Carbonate), EMC (ethyl methyl carbonate) and EP (ethyl propionate); the electrolyte is LiPF6; the additive comprises a LiBF4, PS (propane sultone) and FB (fluorobenzene) which are added for improving the high-temperature performance, and FEC (fluoroethylene carbonate) which is added for improving the low-temperature performance and the long-cycling performance. The lithium ion battery comprising the electrolyte solution can meet requirements that the electric discharge capacity of the lithium ion battery under 0.2C (Capacity) at a lower temperature of -40 DEG C is greater than the electric discharge capacity at a normal temperature by more than 75%; the electric discharge capacity of the lithium ion battery under 0.1C is greater than the electric discharge capacity at the normal temperature by more than 85%. Meanwhile, the capacity retention ratio of the lithium ion battery can be retained by more than 80% after the lithium ion battery is cycled for 500 circles. After the lithium ion battery with full charge is stored for 7 days at 60 DEG C, the thickness swelling rate of the lithium ion battery is less than or equal to 5.0%; the capacity recovery rate of the lithium ion battery is greater than 90%. After the lithium ion battery is stored for 90 days, the capacity recovery rate of the lithium ion battery is greater than 95%.

The present invention relates to a lithium ion battery low temperature electrolyte and a lithium ion battery, and belongs to the technical field of lithium ion batteries. The lithium ion battery low temperature electrolyte comprises, by weight, 5-20% of lithium hexafluorophosphate, 0.1-3% of lithium fluoride, 0.2-5% of lithium tetrafluoroborate, 48-94.7% of an electrolyte solvent, 2-5% of vinylene carbonate, 2-10% of ethyl propionate, and 1-5% of ethyl acetate. With the lithium ion battery low temperature electrolyte of the present invention, the charge-discharge performance and the cycle performance of the electrolyte at the low temperature can be improved.

The invention relates to the field of cigarette flavoring, in particular to a mango flavor tobacco essence, which consists of the following raw materials by weight: 30-40 parts of mango extract, 10-20 parts of citrus oil, 5-10 parts of dihydrocoumarin, 20-30 parts of aromatic tobacco extract, 15-20 parts of ethyl propionate and 20-25 parts of propylene glycol. The mango flavor tobacco essence provided by the invention has the advantages of simple and easily available raw materials, simple preparation and low cost. And the rolled cigarettes are rich in aroma and unique in style during smoking, and have the unique flavor of mangoes and oranges.

The invention relates to the technical field of medicine synthesis and purification, in particular to a synthesis method for preparing dabigatran etexilate. The method comprises the following steps: with N-(4-cyanophenyl) glycine and 3-[(3-amino-4-methylamino benzoyl) (pyridine-2-yl) amino] ethyl propionate as raw materials, carrying out dehydration-condensation reaction, sequentially introducing hydrogen chloride and an ammonia gas to the reactants in an ethanol solution; adding hexyl chloroformate, and carrying out condensation reaction; and carrying out recrystallization to obtain the dabigatran etexilate of which the purity is 99%. The method is simple, safe, easy to operate, short in reaction cycle, and relatively high in yield and purity; impurities are easy to remove; column chromatography isolation is not needed in purification; and the method is suitable for industrialized production.

The invention relates to a preparation containing: (i) a composition containing (a) one, two or a plurality of compounds selected from the group consisting of (a1) alcohol monoterpenes of formula (I) in which R1 is H or methyl, R2 is H or C2-alkenyl, and R3 is a linear or branched, saturated or unsaturated hydrocarbon radical with 4 to 10 carbon atoms, and the enantiomers, diastereomers, racemates, solvates and physiologically compatible salts thereof, and / or (a2) bicyclic epoxy-monoterpenes, (b) at least two lactones of formula (II) in which R4 is H or methyl, R5 is a linear or branched, saturated or unsaturated hydrocarbon radical with 2 to 10 hydrocarbon atoms and n is the number 1 or 2, and the enantiomers, diastereomers and racemates thereof, (c) one, two or a plurality of solvents selected from the group consisting of ethanol, water, dipropylene glycol (DPG), diethyl phtalate (DEP), propylene glycol (PG), isopropyl myristate (IPM), isopropyl palmitate (IPP), triethyl citrate (TEC), triacetin (TRI), 1,2-Propanediol, 1,3-Propanediol, Propanethiol, Pentanediol, Hexanediol, Octanediol, Decanediol (SymClariol®), Dodecanol, 4-hydroxy-acetophenone (SymSave® H), glycerine, butylene glycol, pentylene glycol, hexylene glycol, decylene glycol, propylene carbonate, butylene carbonate, glycerine carbonate, 2-5 benzyl heptanol, lauryl alcohol, trimethyl-hydroxypentyl-isobutyrate, glyceryl-caprylate, ethylhexyl glycerine, benzyl benzoate (BB), and optionally (d) other flavouring agents or aromatic substances selected from the group consisting of 3-phenylbutanal (Trifernal), acetyl methyl carbinol, anethole, anisyl acetate, dihydroeugenol, linalyl formate, 2-methyldecanal, 2-benzyl-2-methylbut-3-ene nitrile (Ci-trowanil® B), 3-hexenyl acetate, styrallyl acetate, belanis, citronellal, cinnamyl acetate, rhubafuran, beta-ions, anther, prenyl acetate, 2-phenyl propanal, 4-(4-hydroxyphenyl)butan-2-one (Frambinon®), ethyl phenoxyacetate, isoralderine, gamma-terpinene, limonene, neocyclocitral, methyl lavender ketone, styrallyl propionate, phenyl ethyl propionate, limonenal, 4-isopentylcyclohexanol (Symrose®), 4-methyl-2-phenyl-3,6-dihydro-2H-pyran / 4-methylene-2-phenyl-tetrahydropyrane (Rosyrane super), hydrocitronitril, phenoxanol, isoamyl phenylacetate, damascone, silvial, nectaryl, ambroxide, acetyl pyrazine, trimethyl pyrazine, isoamyl acetate, para-cresyl methyl ether, filbertone, cyclohexyl acetate, heliotropin, acetophenone, anisaldehyde, para-methyl acetophenone, veratraldehyde, methyl anisate and vertoprenal; (ii) aldehydes of formula (III) in which R6 is a saturated or non-saturated, linear hydrocarbon radical; and / or (iii) free fatty acids of formula (IV), in which R7 is a linear or branched, saturated hydrocarbon radical.

The invention relates to an anti-aging geogrid prepared by processing the following raw materials in parts by weight: 70-80 parts of HDPE, 20-30 parts of LLDPE, 8-12 parts of EVA, 1-2 parts of 2,2'-thiobis[3-(3,5-ditert-butyl-4-hydroxyphenyl)ethyl propionate], 1-2 parts of antioxidant BHT, 0.1-0.3 part of light stabilizer 744, 4-6 parts of calcium carbonate and 3-5 parts of modified carbon black master batches. The preparation method of the anti-aging geogrid comprises the steps of mixing all the materials in the formula, and extruding to obtain a melt; forming a plate from the melt by using a three-roll calendar; punching the plate by using a punching machine; and stretching after heating the pore plate to obtain the geogrid. The modified geogrid prepared by processing the raw materials is good in anti-aging performance, high in various mechanical properties and low in production and processing costs.

The invention discloses a novel microbial strain Saccharomyces cerevisiae CGMCC No.2230 and application of the Saccharomyces cerevisiae CGMCC No.2230 in biotransformation preparation of beta-hydroxybenzoic ethyl propionate, wherein, the Saccharomyces cerevisiae CGMCC No.2230 is collected in China General Microbiological Culture Collection Center of China Committee for Culture Collection of Microorganisms with a collection number of CGMCC No.2230. The application of the invention is that: beta-carbonyl benzoic ethyl propionates are taken as substrates, and immobilized cell particles which are prepared by fermentation broth obtained after fermentation of the Saccharomyces cerevisiae strain CGMCC No.2230 are taken as biocatalysts; transformation reaction time of transformation liquid is 8 to 72 hours at the temperature of 25 to 30 DEG C in a water / dibutyl phthalate two-phase system, and the product beta-hydroxybenzoic ethyl propionates are obtained after separation and purification of the transformation liquid. The microbial transformation method has the advantages of friendly surroundings, mild reaction conditions, simple product separation, high substrate transformation ratio, good product purity and biocatalysts capable of being reused, and is suitable for commercial process.