9 results about "Fatty aldehyde" patented technology

Provided is a composition capable of suppressing generation of a trimer even when an aliphatic aldehyde at a high concentration of 90 mass% or more is stored at a low temperature. The composition contains 90 mass% or more of an aliphatic aldehyde having 8-16 carbon atoms and 100 ppm or more and 1 mass% or less of an additive with respect to the mass of the aliphatic aldehyde, wherein the additive is one or more selected from the group consisting of polyalkylene glycol derivatives represented by formula (I), sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters, amino acids represented by formula (II), anthranilic acid esters represented by formula (III), and pyrazine derivatives represented by formula (IV).

The present application relates to temperature sensitive indicating material, cold chain monitoring and biomedical packaging technical field, specifically relates to a kind of temperature indicator based on polyvinyl acetal polymer white type.It is specifically technical scheme that the high temperature indicator includes temperature sensitive indicating layer, the temperature sensitive indicating layer includes modified polyvinyl acetal polymer, the modified polyvinyl acetal polymer is prepared by acetalization reaction of polyvinyl alcohol and aliphatic aldehyde.This application solves the problems of high cost, not intuitive, difficult to characterize cumulative heat exposure history and difficult to grade severity in the existing vaccine temperature monitoring mode.

This invention provides a method for producing aliphatic aldehydes in high yield by oxidizing aliphatic primary alcohols having four or more carbon atoms. [Solution] A method for producing an aliphatic aldehyde, comprising the step of oxidizing an aliphatic primary alcohol having 4 or more carbon atoms with molecular oxygen in the presence of an N-oxyl compound and / or an N-oxide compound and a metal-supported catalyst, The metal-supported catalyst includes a metal supported on an inorganic support, A method for producing an aliphatic aldehyde, wherein the N-oxyl compound and / or N-oxide compound is one or more selected from the group consisting of compounds represented by general formula (I), compounds represented by general formula (II), and compounds represented by general formula (III). [Formula 1] JPEG2026104778000025.jpg37124

The application provides a method for preparing naphthoquinone compounds by selectively oxidizing naphthyl aromatic hydrocarbons with molecular oxygen, and belongs to the technical field of fine chemicals. The method uses Co-based catalysts to selectively oxidize naphthyl aromatic hydrocarbons with molecular oxygen to prepare naphthoquinone compounds in the presence of fatty ethers or fatty aldehydes. The Co-N-C composite material used in the method is obtained by mixing an inorganic metal salt and an organic nitrogen-containing compound to obtain a precursor, and then calcining the precursor in an inert atmosphere at a certain temperature. The conversion rate of naphthyl aromatic hydrocarbons is more than 80%, and the selectivity of naphthoquinone compounds is more than 75%. The application uses molecular oxygen as an oxidant, and the catalytic reaction conditions are relatively mild and the reaction is safer. In the oxidation system, the naphthyl aromatic hydrocarbons mainly undergo C-H bond oxygenation reaction on the naphthalene ring, which is a new system for synthesizing naphthoquinone compounds.

The present application belongs to the technical field of high-toughness chitosan-based film, and relates to a chitosan-based film, a preparation method and application thereof. The preparation method of the high-toughness chitosan-based film comprises the following steps: uniformly mixing a chitosan solution and a water-soluble polymer solution to obtain a mixed solution A; casting the mixed solution A on a carrier surface; and contacting the cast mixed solution A with a fatty aldehyde to perform a cross-linking reaction, so as to obtain a gel film, and drying the gel film to obtain the high-toughness chitosan-based film. The chitosan-based film prepared by adopting the technical scheme of the present application has a tensile strength of up to 92.3 MPa, an elongation at break of up to 121.5%, and a toughness of up to 69.4 MJ / m 3 2, which effectively improves the toughness of the chitosan-based film. In addition, after chemical cross-linking and constraint drying, the barrier property of the film is significantly improved, the water vapor and oxygen transmission coefficients are reduced, and the film has higher flatness.

This invention provides a method for producing aliphatic aldehydes in high yield by oxidizing aliphatic primary alcohols having four or more carbon atoms. [Solution] The present invention is a method for producing an aliphatic aldehyde, comprising the step of oxidizing an aliphatic primary alcohol having 4 or more carbon atoms with molecular oxygen in the presence of an amine compound and a metal-supported catalyst, wherein the metal-supported catalyst contains a metal supported on an inorganic carrier, and the amine compound is a compound represented by general formula (I). JPEG2026104782000016.jpg15159

The application relates to the technical field of long-chain fatty acid preparation, and discloses a catalyst for oxidizing long-chain fatty aldehyde to prepare long-chain fatty acid as well as a preparation method and application of the catalyst. The catalyst has a structure shown in formula I: wherein X1 is a heteroatom or an acyl group containing a heteroatom; M is an alkali metal element; and A is a nanoparticle, and A is selected from SiO2 or Fe3O4. The nanoparticle is modified by being rich in a hydroxyl group, a mercapto group or an amino group on the surface, and then is contacted with a lactone, an acid anhydride compound or a diacid compound to react, so that the catalyst containing the nanoparticle and containing a carboxyl group is obtained. The preparation method is simple and easy to operate, and separation is simple; the catalyst has high catalytic efficiency, high selectivity and high conversion rate for products, the yield of the fatty acid can reach more than 93%, and the homogeneous catalyst can be recycled.

This invention provides a method for producing aliphatic aldehydes in high yield by oxidizing aliphatic primary alcohols having four or more carbon atoms. [Solution] A method for producing an aliphatic aldehyde, comprising the step of oxidizing an aliphatic primary alcohol having 4 or more carbon atoms with molecular oxygen in the presence of a phenol derivative and a metal-supported catalyst, wherein the metal-supported catalyst includes a metal supported on an inorganic carrier. A method for producing an aliphatic aldehyde, wherein the phenol derivative is a compound represented by general formula (I). JPEG2026104779000037.jpg27159

This invention belongs to the field of natural gas hydrate inhibition, specifically relating to an alkylimine-type natural gas hydrate inhibitor, its preparation method, and its application. The technical solution of this invention is as follows: an alkylimine-type natural gas hydrate inhibitor, prepared from chitosan, 3-chloro-2-hydroxypropyltrimethylammonium chloride, and aliphatic aldehydes. The alkylimine-type natural gas hydrate inhibitor, its preparation method, and its application provided by this invention can inhibit the formation of natural gas hydrates, prolong the induction time of natural gas hydrate formation, and significantly improve the inhibition effect on natural gas hydrates.