85 results about "P-methoxybenzaldehyde" patented technology

The invention relates to a mixture of compounds having the sensory properties of winter-green, to fragrance and flavoring compositions containing said mixture and to flavored and perfumed products containing said mixture, to a method of adding a wintergreen flavor, odor or note to (non-wintergreen) flavored or perfumed products. Further the present invention relates to the use of said mixture as an enhancement, or as complete or partial replacement for methyl salicylate, in particular in chewing gum, foods, dentrifices, mouthwashes and other orally consumable products. The mixture comprises or consists of dihydroanethole, o-anisaldehyde, 1,3-dimethoxybenzene, 2′-hydroxyacetophenone, and optionally 2-methoxyacetophenone.

The invention relates to a co-production method for preparing corresponding alcohol, ester, aldehyde and acid by oxidizing p-methoxyl methylbenzene by oxygen. The method comprises the following steps: adding p-methoxyl methylbenzene, a catalyst I and a solvent into an oxidizing reaction kettle, and introducing oxygen to react; after oxidizing reaction, recovering the solvent and optionally selecting to apply mechanically, and then adding water to wash the catalyst I to obtain an organic phase I and an aqueous phase I; adding alkali into the organic phase I, decompressing and evaporating an organic phase II, after adding water to the bottom, adjusting the pH value by an acid, and filtering to obtain p-methoxybenzoic acid; distilling the water phase I to recover water, optionally selecting to apply mechanically, further adding the catalyst I and the solvent at the bottom, and optionally selecting to apply mechanically in oxidizing reaction; rectifying the organic phase II to obtain a product p-methoxybenzaldehyde and anisyl acetate; carrying out basic hydrolysis on anisyl acetate to obtain an anisic alcohol crude product; and rectifying to obtain an anisic alcohol pure product. The co-production method provided by the invention has the advantages of greenness and environment protection, mild reaction condition, low cost and less three waste, and is easy to industrially produce, and the obtained product is widely applied to the fields of foods, medicines and daily chemicals.

The invention relates to lemon essence for water-based ink. The lemon essence is prepared from, by weight, 1%-30% of lemon essence, 5%-55% of compound modification oligosaccharide and deionized water. The lemon essence is composed of lemon oil, litsea cubeba oil, citral diethyl acetal, myrac aldehyde, bergamot aldehyde, lemonile, decanal, caprylic aldehyde, dodecanenitrile, citonellye nitrile, ethyl methylphenylglycidate, linalyl acetate, linalool, lilial, benzyl acetate, cyclamen aldehyde, terpilenol, terpinyl acetate, anisic aldehyde, verdyl acetate, geraniol, geranyl acetate, citronellol, citronellyl acetate, isocyclocitral, styralyl acetate, isoeugenol, ionone, heliotropin, iso-longitolanone, HHCB and ethyl alcohol. The invention further provides a preparation method of the lemon essence for the water-based ink. According to the lemon essence for the water-based ink and the preparation method of the lemon essence, the compound modification oligosaccharide is used as a wall material, the lemon essence is wrapped so that lemon nanocapsule slow-release essence can be formed, and therefore fragrance depositing and water solubility of the essence are improved.

The invention discloses a carbazolyl porous organic polymer-carried transition metal oxide catalyst and a method for preparing p-methoxybenzaldehyde by oxidizing p-methoxytoluene. The carbazolyl porous organic polymer-carried transition metal oxide catalyst is prepared by taking carbazolyl porous organic polymers as the carrier, carrying transition metal oxides on the carrier and performing calcination. The skeleton of the carbazolyl porous organic polymers is provided with uniformly-distributed nitrogen atoms, which can to some extent interact with metal, so that the uniformly-distributed nitrogen atoms can activate the active sites of the metal oxides on the one hand and reduce loss of active components during reaction on the other hand. The carbazolyl porous organic polymer-carried transition metal oxide catalyst can efficiently catalyze p-methoxytoluene to prepare p-methoxybenzaldehyde and achieve a conversion rate and selectivity up to higher than 70%. Compared with traditional heterogeneous catalysts, the carbazolyl porous organic polymer-carried transition metal oxide catalyst is high in thermal stability, better in catalytic activity, less prone to loss of active componentsand longer in service life.

The invention discloses a preparation method of anisic aldehyde. The preparation method comprises the following steps: 1, firstly adding N,N-dimethyl formamide and pyridine in a reaction kettle, then at a low temperature, dropping triphosgene dissolved by chloroform and carrying out a reaction, after dropping of triphosgene is finished, carrying out heat preservation, and continuing the reaction for 0.2-1 h; 2, keeping the low temperature, adding aluminum trichloride into the reaction liquid in batches, and after completing addition of aluminum trichloride, carrying out heat preservation for 0.2-1 h; 3, steaming out chloroform in the kettle, making the kettle temperature reach 60-100 DEG C, and slowly dropping anisole with keeping the temperature; 4, after completing dropping of anisole, continuing to heat and stir for 6-10 h at the temperature of 60-100 DEG C; and 5, after the reaction is finished, quenching the reaction liquid with a liquid caustic soda solution, washing, extracting, desolventizing, and rectifying to obtain the final product anisic aldehyde. The method has the characteristics of simpleness, easy control and industrialized production; and the produced anisic aldehyde is safe and stable, and the production efficiency is improved.

The invention discloses purple yam essence, and a preparation method and application thereof. The purple yam essence is prepared from 2,3,5-trimethyl pyrazine, 2,3-dimethylpyrazine, dimethyl sulfide, butanedione, 3-hydroxy-2-butanone, 3-methylthiopropanal, 2-acetylpyrazine, 3-methylthio-propanol, butyryl butyl lactate, gamma-heptalactone, gamma-caprylolactone, ethyl maltol, maltol, anisic aldehyde, gamma-nonalactone, ethyl myristate, gamma-decalactone, delta-decalactone, mercaptan, delta-dodecalactone, ethyl vanillin, vanillin, trans-2-ethoxy-5-phenol and vanilla bean tincture are used as the main raw materials. the purple yam essence is prepared by adding all the raw materials into a container and uniformly agitating and mixing to obtain the purple yam essence. According to the purple yam essence, the raw materials are rich in source, so that the purple yam essence is coordinated and soft in aroma, has the natural featured aroma of prepared henry steudnera, and is rich in aroma, long in lasting time and stable. The purple yam essence can be used for adding the aroma of cakes, ice cream, milk products, drink and other products.

The invention discloses a synthetic process for p-methoxybenzaldehyde. The synthetic process comprises methylation reaction with p-hydroxybenzaldehyde as a raw material, methyl chloride gas as a methylation raw material and water as a solvent according to a certain feeding proportion. According to the invention, methyl chloride gas is used as the methylation raw material, so reaction is single; selectivity is up to 95%; yield of a target product reaches more than 90%; meanwhile, treatment of three wastes is simple, so the process belongs to clean and green chemical synthetic process.

What is provided includes a porous sol-gel material whose intrinsic pH is lower than 1 and comprising at least one probe molecule chosen from the group consisting of croconic acid, p-dimethyl-aminobenzaldehyde (DMABA), p-dimethyl aminocinnamaldehyde (DMACA), p-methoxybenzaldehyde (MOB) and 4-methoxy-1-naphtaldehyde (MON). In addition, a detection system containing the porous sol-gel material and a method of preparation and use of the porous sol-gel material for trapping and/or detecting and optionally quantifying at least one chemical compound such as indole and indole compounds are provided.

The invention relates to a method for preparing p-methoxybenzaldehyde by p-methoxybenzoic acid, which comprises the following steps: adding p-methoxybenzoic acid, o-phenylenediamine and a solvent in a condensation reaction kettle, wherein a catalyst is not used in the step, performing backflow water distribution when no water is generated; cooling, filtering to obtain 2-(4-methoxyphenyl)benzimidazole; adding a catalyst, absolute methanol and 2-(4-methoxyphenyl)benzimidazole in a hydrogenation reaction vessel, setting reaction temperature and hydrogen pressure, performing a hydrogenation reaction when hydrogen is unabsorbed, cooling to room temperature; recovering methanol from a filtrate, adding a sulfuric acid aqueous solution, performing backflow for reaction, then cooling to the temperature of 60-65 DEG C, separating the liquid to obtain an oil layer and a water layer, washing the oil layer to neutrality, and rectifying to obtain the final product. The preparation method has the advantages of mild reaction condition, low cost, less three wastes and easy realization of industrial production.

The invention discloses cherry essence and essence microcapsules. The cherry essence comprises musk, abelmoschus esculentus lactone, methyl dihydrojasmonate, triethyl citrate, gamma-undecalactone, phenyl-1-hexanol, 3-Methyl-3-phenylglycidic acid ethyl ester, phenoxyethyl isobutyrate, dimethyl benzyl carbinyl butyrate, beta-ionone, natural anisylacetone, fructose ester, ethyl vanillin, tricyclodecenyl acetate, damascenone, methyl cinnamate, phenylethyl acetate, blackcurrant essence, high-cis o-tert-butyl cyclohexyl acetate, anisic aldehyde, phenoxyethanol, ethyl maltol, styrallyl acetate, ligustral, isononyl acetate, benzyl acetate, benzaldehyde, hexyl acetate, ethyl 2-methylvalerate, 2-methyl butyl acetate and the like. The cherry essence prepared by the invention not only has strong cherry fragrance, but also has natural soft feeling and high harmony, and the cherry essence microcapsules prepared by taking the cherry essence as a raw material can keep excellent flavor quality of the cherry essence in long-term storage.

The invention relates to a medical suture and a preparation method thereof. The medical suture consists of the following ingredients in parts by mass: 35-55 parts of polyglycollide, 3-16 parts of chitin, 2-13 parts of collagen fibers, 1-8 parts of pigskin collagen, 0.5-4.5 parts of sodium alginate, 0.3-1.5 parts of glucose, 0.5-2.5parts of anisaldehyde, 0.1-0.4 parts of sodium polyacrylate, 0.1-0.4 parts of saccharin, 0.2-0.8 parts of nano cellulose, 0.1-0.5 parts of vinyl silicon oil, 0.1-0.4 parts of polytetrafluoroethylene and 0.1-0.4 parts of glutaraldehyde. The medical suture provided by the invention is excellent in degradation and absorption properties as well as biocompatibility; meanwhile, the medical suture can develop a bacteriostatic effect for a long time; and the medical suture, after being used for stitching wound, is free from the generation of inflammations and is not easy to cause scars.

The invention relates to a method for preparing para methoxy phenyl acetonitrile, which comprises the following steps: firstly adopting p-methoxybenzaldehyde as the raw material to generate anisyl alcohol under the action of a reducing agent; after drying the obtained reaction product, carrying out chlorination on the dried reaction product by thionyl chloride to obtain benzyl chloride; and carrying out cyanoethylation reaction on the obtained benzyl chloride under the alkaling conndition and under the action of a phase transfer catalyst to obtain the para methoxy phenyl acetonitrile, wherein the total yield of the para methoxy phenyl acetonitrile reaches over 85 percent.

The invention relates to the field of essence, and particularly discloses oriental flower flavored essence and a preparation method thereof. The oriental flowery flavor essence consists of a main flavor, a modifier, a mixing agent, a fixative and a solvent. The main flavor is prepared from the following components: linalool, benzyl alcohol, phenethyl alcohol, benzyl acetate, methyl anthranilate, methyl benzoate, methyl salicylate, iso-methyl ionone, alpha-hexylcinnamic aldehyde, anisic aldehyde, hydroxycitronellal, undecan-4-olide, specially pure vanillin, ethyl maltol, eugenol and limonene. The modifier is prepared from the following components: cinnamic alcohol, rose ether and cedar wood oil. The oriental flower flavored essence has the advantages that the oriental flower flavored essence has a comfortable and natural feeling while generating complicated fragrance change.