7 results about "Cinnamyl alcohol" patented technology

The application discloses a cobalt silicate modified platinum-based catalyst, a preparation method and application, and belongs to the technical field of industrial catalysts. The platinum-based catalyst comprises a carrier, a cobalt silicate modification layer generated in situ on the carrier, and platinum nanoparticles loaded on the cobalt silicate modification layer; the cobalt silicate modification layer is a continuous fibrous structure and is covalently combined with the carrier through Si-O-Co bonds. The cobalt silicate modification layer realizes anchoring and electron transfer of the platinum nanoparticles, makes the platinum in an electron-rich state, weakens adsorption on an alpha, beta-unsaturated aldehyde C=C bond, and strengthens selective adsorption on a C=O bond; when the catalyst is applied to selective hydrogenation of alpha, beta-unsaturated aldehydes, the conversion rate of cinnamyl aldehyde can reach 98.2%, the selectivity of cinnamyl alcohol can reach 92.0%, and the catalyst is suitable for hydrogenation of various alpha, beta-unsaturated aldehydes such as aromatic aldehydes, aliphatic aldehydes and furan aldehydes, and has excellent catalytic activity, selectivity and stability, and good industrial application prospect.

This application provides a catalyst for the selective hydrogenation of cinnamaldehyde to cinnamyl alcohol, its preparation method, and its uses, relating to the field of catalysts. The catalyst for the selective hydrogenation of cinnamaldehyde to cinnamyl alcohol comprises an active component, a metal promoter, and a support; the active component is nano-Pt clusters, the metal promoter is W, and the support is a porous material; the active component and the metal promoter exist in the form of composite nano-clusters within the pores and on the outer surface of the support. The catalyst preparation method includes: mixing a water-soluble tungsten salt precursor, ethylene glycol, and water, adjusting the pH to strongly acidic to obtain a metal promoter solution; adding the Pt precursor to the metal promoter solution, and performing a photoprecipitation reaction under ultraviolet light irradiation to obtain a tungsten oxide-modified Pt nanoparticle sol; adding the support to the Pt nanoparticle sol, stirring, impregnating for adsorption, washing, and drying to obtain the catalyst. The catalyst provided in this application exhibits significantly superior selectivity for the target product cinnamyl alcohol.

The application discloses a photo-thermal dual-curing resin based on pyromellitic dianhydride and cinnamyl alcohol, which is composed of 4-6 parts of bio-based cinnamyl alcohol, 5-9 parts of hydroxyethyl methacrylate, 4-6 parts of pyromellitic dianhydride, 4-6.5 parts of bio-based epoxy soybean oil, 0.04-0.07 parts of a first catalyst, 0.07-0.09 parts of a polymerization inhibitor, 0.1-0.2 parts of a second catalyst and 0.4-0.7 parts of a photoinitiator in terms of weight parts; the first catalyst is at least one selected from 4-dimethylaminopyridine, p-toluenesulfonic acid, triethylamine and stannous octoate; and the second catalyst is triphenylphosphine. By introducing a rigid benzene ring structure (from PMDA) and multiple photosensitive groups (acrylate double bonds and cinnamyl double bonds), the application effectively solves the problems of low mechanical strength and poor thermal stability of a cured product of pure epoxy soybean oil-based resin. The obtained resin has excellent thermal performance, mechanical strength and high bio-based content.

The application discloses a method for preparing cinnamyl alcohol by hydrogenating cinnamyl aldehyde. The method comprises the following steps: in a reactor, under a non-active gas atmosphere, mixing isopropanol with cinnamyl aldehyde, and contacting the mixture with a catalyst to obtain cinnamyl alcohol by reaction; the catalyst is composed of a carrier and cobalt particles loaded on the surface of the carrier; the size of the cobalt particles is 2-30 nm, and the cobalt particles are highly dispersed; and the loading amount of the cobalt particles in the catalyst is 30-70 wt%. The biomass alginate with low price is used as a carbon source, and the preparation method is simple and easy to implement. The catalyst has the advantages of high Co loading amount, small Co particle size and high dispersion, and exhibits good catalytic activity and cinnamyl alcohol selectivity in the selective hydrogenation reaction of cinnamyl aldehyde.

The application relates to the technical field of compound synthesis, and particularly discloses a preparation method of an intermediate of toripalimab citrate, which comprises the following steps: a first reaction of cinnamyl alcohol and diethyl phosphite in an organic solvent to obtain a first reactant; and a second reaction of the obtained first reactant, alkali and 4-[2-(N,N-dimethylamino)ethoxy]benzophenone to obtain a second reactant containing the intermediate I of toripalimab citrate. A brand-new process route is developed, raw materials used in the route are all easy to obtain, the whole reaction route is short, operation is simple, reaction conditions are mild and safe, the yield of the obtained intermediate I of toripalimab citrate is high, the purity is also high, the total yield is more than 80%, the purity is more than 99.9%, and industrialized production can be realized.

The present invention relates to a composition for absorbing ultraviolet (UV) electromagnetic radiation, wherein the composition comprises a UV absorbing agent and a film forming agent, wherein the UV absorbing agent is a compound Ar-Xn-R with Ar, X, n and R as defined in the specification, particularly the UV absorbing agent is cinnamic acid, cinnamyl alcohol or gallic acid, or a derivative thereof. The invention further relates to a substrate comprising a coating and a method for protecting a surface of a substrate from UV electromagnetic radiation.

This invention discloses a plum blossom fragrance and its artificial preparation method, belonging to the field of fragrance and flavor technology. The plum blossom fragrance is composed of the following components by mass percentage: cinnamyl alcohol 60.8%-74.4%, eugenol 4.5%-5.6%, benzyl acetate 0.2%-0.3%, 3-phenylpropanol 1.3%-1.7%, cinnamyl acetate 1.1%-1.3%, benzaldehyde 1.1%-1.3%, 4-vinylphenol 17.7%-21.6%, benzyl benzoate 3%-3.7%, nonanal 0.06%-0.1%, and hexanal 0.02%-0.05%. The obtained plum blossom fragrance has a similarity of up to 7.25 / 10 to the aroma of natural plum blossoms, and has advantages such as high aroma reproduction and controllable cost.