21 results about "Phenylacetaldehyde" patented technology

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.

A mosquito repellent composition and a preparation method therefor and a use thereof, and a product having the composition, relating to the technical field of mosquito repelling. The mosquito repellent composition comprises in percentage by weight: 0.1-40% of a mosquito repellent active ingredient, 1-10% of an emulsifier, 3-8% of an antifreeze agent, 0.1-3% of a thickener, 0.1-2% of a defoamer, and the balance being water, or 0.1-40% of a mosquito repellent active ingredient, 1-10% of an emulsifier, 1-10% of a capsule wall material, 0.1-0.5% of a pH regulator, 3-8% of an antifreeze agent, 0.1-3% of a thickener, 0.1-2% of a defoamer, and the balance being water, wherein the mosquito repellent active ingredient comprises α-ethylidene-phenylacetaldehyde, or a tautomer or cis-trans isomer thereof. Compared with an α-ethylidene-phenylacetaldehyde technical material, the mosquito repellent composition has greatly improved thermal storage stability and a longer-lasting mosquito repellent effect. Compared with emulsions in water and capsule suspensions prepared by other formulas, the emulsion stability after thermal storage is greatly improved.

The present application relates to the technical field of pest attractant, in particular to a kind of corn borer adult food attractant.The food attractant is developed based on the corn borer flower visiting behavior, and is composed of three components of phenylethanol, phenylacetaldehyde and rosinene, the main components of Asclepiad flower fragrance, which has significant corn borer attracting effect in field, and can effectively attract both male and female adults at the same time, to achieve the purpose of population monitoring or centralized control.The present application does not directly contact crops, has the advantages of high efficiency, non-toxic and non-residue, and does not kill natural enemies, etc., and is an environmentally friendly green control new technology.

This invention discloses a method for synthesizing a tenapano hydrochloride intermediate. The synthesis method includes the following steps: (1) condensing the compound 3-bromophenylacetaldehyde and the compound N-methyl-(2,4-dichlorophenyl)methylamine under dehydration conditions to obtain an enamine intermediate; (2) subjecting the enamine intermediate to an intramolecular cyclization reaction in the presence of an acid catalyst to obtain the tenapano hydrochloride intermediate 4-(3-bromophenyl)-6,8-dichloro-2-methyl-1,2,3,4-tetrahydroisoquinoline. The synthetic route provided by this invention requires only two steps to construct the key framework, and has the advantages of short reaction steps, high overall yield, and no need to use highly toxic liquid bromine. This process has high atom economy, reduces the emission of waste gas, wastewater, and solid waste, and is suitable for large-scale industrial production under mild conditions.

The invention relates to the technical field of new energy, in particular to a preparation method of C9-C13 cycloalkane. The method comprises the following steps: in the presence of a base catalyst and a solvent, carrying out aldol condensation reaction on acetophenone and furfural or phenylacetaldehyde and furfural to obtain (E)-3-(cyclopent-1, 3-diene-1-yl)-1-phenylpropyl-2-ene-1-one or (Z)-3-(furan-2-yl)-2-phenylacrolein; under the action of a nickel-loaded catalyst, (E)-3-(cyclopentyl-1, 2, 4-triazole-3-yl)- The C9-C13 cycloalkane prepared by adopting the preparation method disclosed by the invention has the advantages of high density, high volume calorific value, excellent low-temperature fluidity and good thermal stability, and can be used for preparing the C9-C13 cycloalkane. The problems of low fuel energy density and insufficient performance in the prior art are solved.

The invention belongs to the technical field of biological control, and provides an application of phenylacetaldehyde in improving rice blast resistance, the application is characterized in that phenylacetaldehyde is used as a small molecule chemotactic agent to improve the rice blast resistance, and the effect of phenylacetaldehyde on inducing bacillus and further inhibiting rice blast bacteria is evaluated; results show that bacillus colonization can be directionally recruited by spraying phenylacetaldehyde on rice leaf surfaces, up-regulation of the expression quantity of the rice OsPR2 and OsNPR1 genes can be promoted, the disease resistance of rice to rice blast is enhanced, and a new path is provided for prevention and treatment of rice blast.

The invention discloses a beet armyworm repellent and application thereof. The beet armyworm repellent is prepared from the following components in percentage by volume: 0.01 percent to 0.2 percent of lauric aldehyde, 0.01 percent to 0.3 percent of phenylacetaldehyde, 0.1 percent to 2 percent of trans-2-dodecenal, 0.1 percent to 2 percent of trans-2-tetradecenal and 95.5 percent to 99.78 percent of a solvent. According to the beet armyworm repellent provided by the invention, lauric aldehyde, phenylacetaldehyde, trans-2-dodecenal and trans-2-tetradecenal are used as repellent active ingredients, all the active ingredients supplement each other, a synergistic effect is achieved, the beet armyworm repellent has good oviposition and antifeedant repellent effects on beet armyworms, the repellent rate on the beet armyworms is up to 97.66% + / -0.51%, and the repellent effect on the beet armyworms is up to 97.66% + / -0.51%. The repelling rate is obviously higher than that of a single active component. And the active components are all common natural plant components, are harmless to human bodies, are biodegradable, are environment-friendly, and are convenient and safe to use.

The invention relates to application of a rare earth-based catalyst. The application comprises the step of carrying out hydrogenation reaction on hydrogenation raw materials in the presence of the supported catalyst Ir / CeO2 to obtain alcohol, wherein the hydrogenation raw material is selected from one or more of furfural, 5-hydroxymethylfurfural, 5-methylfurfural, m-tolualdehyde, benzaldehyde, phenylacetaldehyde, phenylpropionaldehyde, p-fluorobenzaldehyde, cinnamyl aldehyde, cinnamyl alcohol, cyclobutanone, cyclopentanone, cyclohexanone, cycloheptanone, tetrahydropyran-4-ketone, tetrahydrothiapyran-4-ketone, crotonaldehyde and terephthalaldehyde; the catalyst is prepared by a method comprising the following steps: mixing a CeO2 carrier with a solution containing a metal Ir precursor, and reacting under heating and alkaline conditions to obtain a catalyst precursor; and calcining and reducing the catalyst precursor to obtain the supported catalyst Ir / CeO2. The rare earth-based catalyst is simple in preparation process, mild in condition, high in hydrogenation activity and good in stability.

This invention discloses a method for identifying tamarind maturity based on aroma markers. Through systematic research, this invention, for the first time, discovers the correlation between eight characteristic aroma markers and tamarind maturity: for unripe tamarind, phenylacetaldehyde, sec-butylamine, 5-acetoxymethyl-2-furfural, and tea spiroane; for ripe tamarind, 5-hydroxymethylfurfural, octanal, p-cymene, and styrene. This method is simple to operate, has an accuracy rate of ≥98%, and is suitable for tamarind harvesting and grading, quality evaluation, and processing quality control.

The application discloses a white tea hydrolat intelligent segmentation collection method based on characteristic aroma distillation kinetics identification, comprising the following steps: establishing the distillation kinetics curve of linalool, geraniol and phenylacetal by standardized distillation and high-frequency GC-MS detection; scientifically identifying the "composite high-efficiency distillation dynamic window" based on the comprehensive aroma index of weighted calculation; realizing intelligent segmentation collection through flow path switching according to the kinetic window parameters, and obtaining high-composite-aroma-purity hydrolat and high-linalool hydrolat respectively, and the aroma profile can be recombined and customized. The total content ratio of the three characteristic components in the obtained high-composite-aroma-purity hydrolat to the total amount of volatile aroma components is significantly improved, and the sensory score is excellent; the content and relative content of linalool in the high-linalool hydrolat are at a high level. The application realizes accurate enrichment of aroma components, improves the concentration of core components, and the product has pure aroma, batch stability, and is suitable for the fields of cosmetics, functional foods and the like.

The invention belongs to the field of food additive essence. The invention discloses pot gas essence and a preparation method and application thereof, and the pot gas essence comprises the following components: caprylic / capric triglyceride, benzyl alcohol, black pepper oil, 2-acetylpyrazine, methylcyclopentenolone, ethyl maltol, 4-hydroxy-2, 5-dimethyl-3 (2H) furanone, 2-tridecanone, acetic acid, 2, 5-dimethylpyrazine, furfuryl mercaptan, 1, 3, 4-trimethyl-1, 3-pentanediol, 1, 3, 4-trimethyl-1, 3-pentanediol, 1, 3, 4-trimethyl-1, 3-pentanediol, 1, 3, 4-trimethyl-1, 3-pentanediol, 1, 3, 4-trimethyl-1, 3-pentanediol, 1, 3, 4-trimethyl-1, 3- The invention relates to an anti-rust oil which is prepared from 1, 8-cineole, 3-(methylthio) propionaldehyde, oleic acid, phenethyl alcohol, sesame oil, 2-decenal, 2, 4-undecadienal, phenylacetaldehyde, 3-(methylthio) butyraldehyde, 3-(methylthio) propanol, bis (2-methyl-3-furyl) disulfide, 2-methyl-3-mercaptofuran and 2, 3-pentanedione. The pot gas essence can simulate real pot gas flavor, and prepared food is good in temperature resistance, high in verisimilitude, lasting and stable in flavor, small in dosage and low in cost and has high application value.

The invention relates to the technical field of perfumes, in particular to an efficient condensation process in perfume synthesis, which comprises the following steps: adding styrene oxide into a methylation reagent, and reacting under the catalysis of acid; after the reaction is finished, adding an alkaline solution to adjust the pH value to 7-8, standing for layering, and taking an organic phase; and evaporating the organic phase at 50-70 DEG C to remove the solvent, and rectifying to obtain the phenylacetaldehyde dimethyl acetal. The high-efficiency condensation process in the synthesis of the perfume-phenylacetaldehyde dimethyl acetal provided by the invention has the advantages of low cost, simple process procedure, low production energy consumption, high yield, total yield of 93% or more, good product quality, purity of 98.5% or more, and wide industrial application prospect.

The application provides a preparation method of acetophenone, acetophenone prepared by the method and application. The steps comprise: reacting ethylbenzene and an oxygen-containing gas under the action of a catalyst and a cocatalyst, and then performing rectification to obtain acetophenone; wherein the catalyst is a metal acid salt, and the cocatalyst is an alkyl siloxane. The method can effectively reduce the types of impurities, improve the selectivity of acetophenone, and through continuous rectification separation, the content of the obtained acetophenone is greater than or equal to 99.9%, the content of 1-phenyl ethanol is 0-100 ppm, and the content of phenyl acetaldehyde is 0-100 ppm. In the ethylbenzene oxidation reaction, through the research on the reaction mechanism, the acetophenone has the characteristics of high yield and few types of impurities, and high-purity acetophenone is obtained through rectification separation.

The invention relates to the field of pesticide preparations, and discloses a bactrocera cucurbitae and South Asia fruit fly repellent and application thereof.The repellent is a preparation with phenylacetaldehyde as an effective component, a phenylacetaldehyde solvent in the repellent is ultrapure water or dimethyl sulfoxide, and the content of phenylacetaldehyde in the repellent is 0.005-0.2% by weight. The phenylacetaldehyde repellent can significantly reduce the oviposition behaviors of the two fruit flies on host plants, so that fruits are effectively protected from being invaded by pests; in addition, the repellent disclosed by the invention can also play a role in preventing and controlling various fruit fly pests at the same time, and has important significance on comprehensive management of pests of various crops. Therefore, when the phenylacetaldehyde is used for repelling pests, the use amount of chemical pesticides can be reduced, the pollution to the ecological environment is reduced, the requirements of modern green agriculture and sustainable development are met, and the phenylacetaldehyde has a good application value in pest repelling, preventing and controlling of bactrocera cucurbitae or South Asia fruit flies.

This invention provides a coffee flavoring and its preparation method, comprising 0.1 parts of furanone, 2-acetylpyrazine, vanillin, ethanol, 3-methylthiopropional, 2-methoxy-4-vinylphenol, 2-ethyl-3-methylpyrazine, 2-ethyl-3,5-dimethylpyrazine, furfuryl mercaptan, β-damascone, p-cresol, hexanoic acid, 2-methylbutyric acid, 2,3-pentanedione, methyl furfuryl disulfide, 3-mercapto-3-methylbutyl formate, terpineol, 1-octen-3-ol, isobutyraldehyde, furfural, 5-methylfurfural, isovaleraldehyde, linalool, 2-methoxy-3-isobutylpyrazine, phenylacetaldehyde, eugenol, 2,3,5-trimethylpyridinium, guaiacol, 4-ethylguaiacol, an amino acid composition, glycerol, water, and coffee extract. The coffee flavoring of this invention has a strong three-dimensional aroma, rich layers, and high overall aroma realism and harmony.

The invention belongs to the technical field of disease control, and particularly relates to a mosquito repelling composition, a mosquito repellent and application of the mosquito repelling composition and the mosquito repellent. The mosquito repelling composition provided by the invention is prepared from pyrethroid and alpha-ethylidene-phenylacetaldehyde. Compared with a single component, the compound mosquito-repelling composition has the effects of repelling and knocking down mosquitoes, and especially has good repelling and knocking down effects on resistant mosquitoes.

The invention belongs to the field of biomass energy and waste recycling, and particularly relates to a solid acid catalyst and a preparation method thereof, and a biomass liquid fuel and a preparation method and application thereof. According to the method, waste polycarbonate (PC) is used as a raw material, and the carbon-based solid acid catalyst is prepared through alcoholysis, polymerization and sulfonation processes. The catalyst is used for efficiently catalyzing alkylation reaction of 2-methyl furan and aromatic carbonyl compounds such as phenylacetaldehyde and vanillin to generate a C9-C18 oxygen-containing intermediate containing a cyclic structure; then the intermediate is subjected to a hydrodeoxygenation reaction under the action of a supported metal catalyst with SiO2 as a carrier, and the biomass liquid fuel rich in cycloalkane is obtained. Compared with the prior art taking pure bisphenol A as a raw material, the method has the advantages that high-valued utilization of the waste plastic is realized, the obtained catalyst shows better catalytic activity on an aromatic substrate, the cetane number and low-temperature fluidity of a final product are remarkably improved, and the catalyst can be used as high-quality diesel oil or an additive thereof.

The application provides a Leuconostoc mesenteroides, which is Leuconostoc mesenteroides zqw123 preserved in the China General Microbiological Culture Collection Center, and has a preservation number of CGMCC No.25154. The Leuconostoc mesenteroides has the capability of simultaneously producing organic acids such as acetic acid, isovaleric acid, hexanoic acid, iso-octanoic acid, octanoic acid, nonanoic acid and n-decanoic acid, organic alcohols such as n-heptanol and 1-nonanol, and aldehyde ketone compounds such as phenylacetaldehyde, 2,3-dihydro-2,2,6-trimethylbenzaldehyde, sec-octanone and geranylacetone, and can provide rich flavoring substances for liquor brewing, and has a good application prospect.

The invention provides a perfume composition based on aldehyde perfume and costustoot synergism and application of the perfume composition. The perfume composition is prepared from the following components: 3.0 to 5.0 weight percent of nonanal, 0.1 to 0.3 weight percent of capraldehyde, 0.3 to 0.5 weight percent of phenylacetaldehyde, 0.5 to 1.0 weight percent of benzaldehyde, 0.1 to 0.3 weight percent of melonal, 1.0 to 2.0 weight percent of peppermint oil, 20 to 30 weight percent of methyl dihydrojasmonate, 30 to 40 weight percent of Opmisinone and the balance of water. And the balance of auxiliary spices and / or dispersants and / or stabilizers. The perfume composition provided by the invention is used in daily chemical products, not only can present the unique olfactory image of'the moment of collision between a sword and a historical reel ', but also breaks through the fragrance framework of the traditional perfume through the ingenious proportion of the aldehyde compound and the wood essential oil, and creates the breath with deep cultural image and characteristic neutral temperament.

The invention discloses a temperature-controlled fermentation process for improving enrichment of aroma substances of flue-cured tobacco, and belongs to the technical field of tobacco processing. The process comprises four core steps of flue-cured tobacco pretreatment, compound fermentation system preparation, staged temperature control fermentation and post-treatment alcoholization. A synergistic fermentation system is constructed through agilawood dominant edgeworthia chrysantha and composite biological enzyme, a three-stage gradient temperature control strategy is adopted, the optimal conditions of microbial metabolism and enzymolysis reaction are accurately matched, and oriented degradation of macromolecular substances and efficient enrichment of aroma substances in flue-cured tobacco are achieved. According to the process, the total amount of aroma substances such as megastigmatrienone, neophytadiene and phenylacetaldehyde in the flue-cured tobacco can be increased, the fermentation period is shortened compared with that of a traditional process, the lasting time of aroma is prolonged, and the sensory quality of the flue-cured tobacco is remarkably optimized.

This invention relates to a method for identifying the age of aged Tieguanyin tea. The method involves obtaining Tieguanyin tea from different years and detecting the content of key indicators. The content of these key indicators is then input into a storage year prediction model to predict the storage year. The storage year prediction model is: y = 6.702 - 17.142x1 - 0.021x2 - 1.242x3 + 51.878x4 - 8.012x5. The key indicators are dihydroactinolone, β-carotene, phenylacetaldehyde, tea aroma ketone, and 2,2,6-trimethylcyclohexanone. x1-x5 represent the content of the five key indicators in the Tieguanyin tea being tested, and a1-a5 represent the regression coefficients of these five key indicators. The prediction model established by this invention has high prediction accuracy and good stability, enabling effective prediction of the storage year of aged Tieguanyin tea, and providing a scientific basis for evaluating the aging quality of Tieguanyin and identifying its market age.