14 results about "Ethyl phenylacetate" patented technology

The invention provides a microcapsule type self-early-warning and self-repairing epoxy coating as well as a preparation method and application thereof, and belongs to the technical field of anticorrosive coatings. The method comprises the following steps: mixing urea, resorcinol, ammonium chloride and a polyethylene grafted maleic anhydride aqueous solution, and adjusting the pH value of the mixed solution to obtain a water phase; mixing the PU prepolymer, DCF, TO and ethyl phenylacetate to obtain an oil phase; the water phase and the oil phase are mixed, a formaldehyde solution is added into the mixed solution for a reaction, and microcapsules are obtained; and adding the microcapsule into the epoxy coating to obtain the microcapsule type self-early-warning and self-repairing epoxy coating. According to the microcapsule, PU / UF serves as a shell of DCF and TO, DCF serves as an early warning agent, and TO serves as a repairing agent; the DT coated PU / UF microcapsule has good dispersibility in the coating, when the coating is damaged, the microcapsule is broken to release DCF and TO, the self-early warning and self-repairing performance of the coating is achieved, and metal corrosion is delayed.

The invention discloses Leishan fish sauce sour essence as well as a preparation method and application thereof. The leishan fish sauce acid essence is prepared from ethyl acetate, absolute ethyl alcohol, ethyl isovalerate, ethyl hexanoate, isoamyl alcohol, furfuryl alcohol, ethyl lactate, ethyl caprylate, acetic acid, diethyl succinate, methyl salicylate, ethyl benzoate, ethyl laurate, hexanoic acid, phenethyl alcohol, 4-methyl guaiacol, ethyl myristate, ethyl palmitate, ethyl oleate, capsicum oleoresin, ethyl phenylacetate and ginger oil. And lactic acid, glycerol triacetate, ocimene, ethyl isovalerate, ethyl butyrate, anethole and phenylacetaldehyde. The Leishan fish sauce sour essence disclosed by the invention is soft and harmonious in overall fragrance, natural and vivid, still has stable flavor characteristics at high temperature, can make up the problem of flavor deficiency in sour soup products, realizes accurate reproduction and controllable release of composite fragrance, improves the standardization level of products, and effectively improves the preference degree of consumers.

The application belongs to the technical field of biological medicine, and particularly relates to a lactobacillus paracasei and application thereof. The lactobacillus paracasei ZY101 is preserved in the China General Microbiological Culture Collection Center, has a preservation number of CGMCC No. 32360, a preservation date of October 25, 2024, and an address of No. 3, Beichen West Road, Chaoyang District, Beijing. Compared with a commercial bacillus acidophilus, the apricot vinegar prepared by using the lactobacillus paracasei ZY101 has new substances including linalool, alpha-farnesene, 2-phenylacetic acid ethyl ester and geranylgeraniol, and further promotes the aroma of the apricot vinegar. Compared with the commercial bacillus acidophilus, the existing substances are obviously improved, and specifically include ethyl acetate, isoamyl acetate, ethyl octanoate, ethyl hexanoate, acetoin, methyl palmitate, gamma-deca-lactone, ethyl dodecanoate, delta-deca-lactone, trans-nerolidol and dihydro-beta-ionone.

This invention provides a flavoring agent for enhancing the honey-sweet aroma of tobacco, comprising the following raw materials and their mass percentages: 0.2-0.3% 2,3-pentanedione, 0.45-0.55% phenylacetic acid, 0.45-0.55% phenethyl acetate, 0.25-0.4% phenylethanol, 0.45-0.6% methyl phenylacetate, 0.45-0.6% ethyl phenylacetate, 0.5-0.6% menthyl acetate, 0.15-0.25% geraniol, and the balance being propylene glycol. This invention belongs to the field of tobacco flavoring technology. By combining 2,3-pentanedione, phenylacetic acid, and phenethyl acetate in a specific mass ratio and conducting testing and evaluation, a flavoring agent suitable for enhancing the honey-sweet aroma of tobacco has been successfully developed. The composition is clearly defined, significantly improving the honey-sweet aroma of tobacco products, with a rich and long-lasting aroma, and good taste harmony.

The present application relates to the field of microbial technology, and particularly to a Pichia kudriavzevii (Pichia kudriavzevii) strain ZB448 and application thereof. Pichia kudriavzevi The Pichia kudriavzevii strain ZB448 provided by the present application has rich ester aroma, especially high content of phenylacetic acid ethyl ester, phenylacetic acid ethyl ester, ethyl acetate and isobutyl acetate, and significantly reduced content of ethyl octanoate; the aroma characteristics generated are strong fruit aroma and honey aroma and weak wine aroma, and the overall aroma is more pleasant and coordinated. The strain is used for fermentation of wheat protein seasoning juice, can effectively increase the content of ester aroma components in the product, weaken the adverse odor of bran koji, increase the content of umami amino acids, so that the product achieves the effect of rich ester aroma, rich aroma, and improved umami, and significantly improves the overall flavor and quality of the product.

The application discloses a method for recycling 5-(N-ethyl-N-hydroxyethyl)-2-aminopentane, which comprises the following steps: 1) adjusting the pH value of wastewater to 12-14 to obtain a first mixed solution; 2) adding an organic solvent to the first mixed solution for extraction to obtain an organic phase containing 5-(N-ethyl-N-hydroxyethyl)-2-aminopentane; 3) performing vacuum concentration on the organic phase to obtain a concentrated solution; and 4) performing vacuum distillation on the concentrated solution, heating to 195-210 DEG C, and collecting a fraction at 190-200 DEG C to obtain 5-(N-ethyl-N-hydroxyethyl)-2-aminopentane, wherein the wastewater is generated in the post-treatment stage of an amination reaction of hydroxychloroquine synthesis, and the organic solvent is at least one selected from dichloromethane, toluene and ethyl acetate. Thus, 5-(N-ethyl-N-hydroxyethyl)-2-aminopentane in the wastewater can be recycled, the purity of the recycled substance reaches 98% or above, the recycled 5-(N-ethyl-N-hydroxyethyl)-2-aminopentane can be reused, and a large amount of production cost can be saved.

The invention relates to the technical field of microorganisms, in particular to pichia kudriavzevii ZB448 and application of the pichia kudriavzevii ZB448. The pichia kudriavzevii ZB448 strain provided by the invention is rich in produced ester fragrance, especially the content of ethyl phenylacetate, phenethyl acetate, ethyl acetate, isobutyl acetate and other substances is relatively high, the content of ethyl caprylate is remarkably reduced, the produced fragrance has the characteristics of strong fruit fragrance and honey fragrance and weak wine fragrance, and the whole fragrance is more pleasant and harmonious when smelled. The strain is used for fermentation of wheat protein sauce, can effectively improve the content of ester aroma components in a product, weaken bad smells such as mouldy bran taste and increase the content of flavor amino acids, so that the product achieves the effects of being rich in ester aroma, rich in aroma and improved in flavor, and the overall flavor and quality of the product are remarkably improved.

The invention provides a surface damage self-diagnosis insulating material as well as a preparation method and application thereof. The surface damage self-diagnosis insulating material comprises a silicon rubber base material, microcapsules and an alkali reagent, wherein the microcapsules and the alkali reagent are dispersed in the silicon rubber base material; the microcapsule comprises a shell and a core material, the shell is a urea-formaldehyde resin polymer, and the core material comprises 2 ', 7'-dichlorofluorescein and ethyl phenylacetate. The mass fraction of the microcapsule in the silicone rubber matrix is 1-10%, and the mass fraction of the alkali reagent in the silicone rubber matrix is 1-10%. According to the surface damage self-diagnosis insulating material provided by the invention, the microcapsule component is added into an existing silicone rubber material, so that the composite material has a damage self-diagnosis function on the premise that the mechanical property and the insulating property are kept good, and red can be displayed as an indication after the material is damaged; the method is of great significance in detection of insulation damage of power equipment, early warning of faults and improvement of use safety and reliability of polymer insulation materials.

The invention relates to the technical field of synthesis of medical intermediates, spices or food additives, in particular to a preparation method of ethyl 4-bromophenylacetate. The preparation method comprises the following steps: (1) adding p-bromophenylacetic acid, ethanol, a water-carrying agent and an acid catalyst into a reactor, heating to reflux for reaction, and separating and removing water in the reaction process; (2) after the reaction is finished, concentrating a reaction solution to recover the water-carrying agent, so as to obtain a crude product of ethyl 4-bromophenylacetate; and (3) carrying out reduced pressure distillation on the ethyl 4-bromophenylacetate crude product, and collecting fractions at 100-120 DEG C under the absolute pressure of 100-200Pa to obtain the ethyl 4-bromophenylacetate product. According to the method, 4-bromophenylacetic acid is used as a raw material and is subjected to acid catalysis in a solvent azeotropic with water, esterification reaction with ethanol is performed to obtain a target product, procedures such as neutralization, extraction and drying are not needed in post-treatment, the production period is effectively shortened, and the method is economical, environmentally friendly, simple to operate and more suitable for industrialization.

The application discloses a kind of composite sweet compound has sweetening effect additive and its application method, belong to food additive technical field.The additive includes mass ratio 5:0.01:0.00625~24 of sucrose, propylene glycol and composite sweet compound;Wherein, composite sweet compound is selected from at least three kinds in ethyl benzoate, furanone, butyl position decanolactone, propyl position decanolactone, carvacrol, carvone, propyl position nonanolactone, benzyl alcohol, citronellol.The application is by compounding three kinds and more than aroma substance, utilizes multiple aroma synergistic effect taste perception, can realize effective sweetening effect under the premise of significantly reducing sucrose amount, improve the comfort of taste simultaneously.This method not only provides important reference for the sweetening effect of different aroma, has scientific research guiding value, also provides a kind of new strategy for food industry by aroma control, realizes sugar reduction gain, can respond to health needs while maintaining flavor and taste, with wide application prospect.

The application discloses a detection method for simultaneously determining the content of seven main volatile flavor components in maca, wherein the main volatile flavor compounds include acetic acid, benzaldehyde, butyric acid, ethyl phenylacetate, phenylacetonitrile, benzyl isothiocyanate and 3-methoxyphenylacetonitrile; the flavor substances in the maca are extracted by using a 95% ethanol ultrasonic extraction method, the quantitative determination is carried out by using an internal standard curve method, and the analysis is carried out by using a gas chromatograph mass spectrometer. The application has the advantages of less interference, low detection limit, high response value, wide detection range and high accuracy.

The application discloses a strain of Rhodotorula mucilaginosa and application of the strain in cider fermentation, and belongs to the technical field of microbial fermentation. The Rhodotorula mucilaginosa CXY1113 is obtained by separation from natural fermentation cider, the strain can tolerate low-pH acidic environment, can utilize malic acid as a carbon source, and reduce the content of malic acid. Compared with single fermentation of Saccharomyces cerevisiae, the application of the Rhodotorula mucilaginosa CXY1113 in cider production can improve the brightness of fruit wine, enhance the antioxidant activity, reduce the content of malic acid, acetic acid and succinic acid in the cider, improve the content of flavor compounds such as ethyl phenylacetate and isoamyl alcohol, the obtained cider has rich and mellow aroma, high quality, coordinated taste, and gives the cider more mellow floral and fruity aroma. The application has important significance for improving the taste and flavor of fruit wine and improving the quality of fruit wine.

The application discloses a novel scheelite collector and a heating cleaning beneficiation process, and relates to the technical field of beneficiation. The application forms an oxime acid benzene alkene compound by using 4-vinyl ethyl acetate and hydroxylamine hydrochloride, and then polymerizes the oxime acid benzene alkene compound with 4-hydroxy styrene and di-vinyl benzene to form a hydrophobic microsphere. The hydrophobic microsphere is used to form a relatively stable surface adsorption with scheelite through hydrophobic association and chemical bonding, and to drive the scheelite to float, so that the scheelite and fluorite are effectively separated. Then, the collector is prepared by mixing the hydrophobic microsphere, 1-formamido-1-cyclopropane carboxylic acid and other raw materials. The 1-formamido-1-cyclopropane carboxylic acid is used to change the hydrophilicity of the fluorite, to inhibit the floatability of the fluorite, and to realize the rapid separation effect. Then, the combination process of one-time normal-temperature rough separation, twice cleaning and one-time heating cleaning is used, so that the recovery rate of WO3 in the scheelite concentrate is greatly improved.

The invention belongs to the technical field of microbial fermentation, and particularly relates to Wickers hansenula anomala, a microbial agent of the Wickers hansenula anomala and application of the Wickers hansenula anomala and the microbial agent of the Wickers hansenula anomala. In order to screen and separate more abnormal Wickersenula polymorpha new strains and enrich the flavor of Baijiu, especially Maotai-flavor Baijiu, the abnormal Wickersenula polymorpha new strain w.a is separated, screened and identified from Maotai-flavor Baijiu fermented grains, and the preservation number of the abnormal Wickersenula polymorpha new strain w.a is CGMCC (China General Microbiological Culture Collection Center) No.39014. The strain not only can grow under high acidity, but also can generate various volatile aroma compounds, such as phenethyl acetate, isoamyl acetate, ethyl phenylacetate, isoamyl alcohol, isobutanol, linalool, phenethyl alcohol, 3, 4-dimethylbenzyl alcohol and guaiacol. Therefore, the strain is of great significance in improving the flavor of white spirit and providing the fragrance of flowers and fruits in the wine production process, especially in the fermentation process of Maotai-flavor white spirit.