10 results about "Octyl aldehyde" patented technology

The invention discloses an exhaled gas VOC (volatile organic compound) marker for detecting inflammatory bowel diseases and a detection system thereof. The marker is a combination of one or more of the following components: methyl propyl sulfide, propionaldehyde, cyclohexanone, allyl methyl sulfide, octanal, 2-pentanone, phenol, butyric acid, propionic acid and 3-methylheptane. The detection system comprises an exhaled air sampling module, a sample preprocessing module, a detection analysis module and a data analysis module. The marker provided by the invention has the advantages of high specificity and good stability, can realize accurate noninvasive diagnosis of IBD, and can assist in realizing early screening and dynamic monitoring in a clinical environment.

The present application belongs to the technical field of catalytic hydrogenation, and relates to a method for preparing iso-octyl aldehyde by selectively hydrogenating iso-octyl aldehyde. The iso-octyl aldehyde, hydrogen and a nickel catalyst are subjected to a contact reaction. The nickel catalyst comprises an alumina carrier and an active component nickel dispersed on the alumina carrier. The alumina carrier is prepared by using a rotary strengthening device, and the preparation comprises the following steps: an aluminum sulfate solution and an aluminum hydroxide-sodium hydroxide mixed solution are jointly pumped into a rotary strengthening reactor by using a liquid pump to form a slurry; the slurry is sprayed into the inside of a wire mesh packing through a solution mixing distributor, and the rotary wire mesh packing shears the slurry into small units; the small units are introduced into a crystallization kettle through the outlet of the rotary strengthening reactor to perform crystallization to obtain crystallized materials, and after filtration, washing and drying, the materials are calcined to obtain the alumina carrier. The present application uses commonly used industrial nickel components and alumina carriers, the reaction condition is mild, the selectivity of iso-octyl aldehyde is high, and the present application has certain industrial application prospects.

The invention discloses a preparation method of alpha-hexylcinnamyl aldehyde, which is characterized in that under the protection of nitrogen, an inorganic alkali aqueous solution is used as a catalyst, a composition of a non-polar solvent and an ether solvent is used as a solvent, and benzaldehyde and octanal react to prepare the alpha-hexylcinnamyl aldehyde. By adopting the method disclosed by the invention, the content of hexyl nonenal which is a condensation product of octanal can be effectively reduced, the selectivity of alpha-hexylcinnamyl aldehyde (relative to octanal) is improved, the product quality is ensured, and the jasmine flower fragrance is characterized; in addition, the wastewater amount can be effectively reduced, the technological process is simplified, and the product competitiveness is improved.

This invention discloses a novel method for preparing 8-(2-hydroxybenzamido)octanoic acid in the field of biomedical technology. The method uses 2-hydroxybenzaldehyde and 8-aminooctaldehyde as raw materials, chloroform as solvent, and tert-butanol peroxide as oxidant, to prepare 8-(2-hydroxybenzamido)octanoic acid via an oxidation-free radical reaction. The route provided by this invention is concise, the conditions are mild, and the product yield is high, offering a general new method for the preparation of 8-(2-hydroxybenzamido)octanoic acid.

The application discloses a preparation method of a catalyst for synthesizing isooctylamine through continuous reduction and amination of isooctyl aldehyde and application thereof. The non-noble metal cobalt-based catalyst is prepared by adopting a precipitation deposition method. The anchoring effect of hydroxyl groups and alkaline groups on the surface of the additives MgO and Al2O3 on the active metal precursor effectively inhibits the formation of metal clusters, so that the active metal is highly uniformly distributed. The preparation process is simple and easy to be industrialized and enlarged, and the catalyst can be applied to a process for synthesizing isooctylamine through reduction and amination of isooctyl aldehyde as raw material, so that the batch stability and conversion rate can be improved.

The application belongs to the field of fine chemical industry, and particularly relates to a method for producing n-octylamine in a pipe. The application provides a method for producing n-octylamine in a pipe, which adopts a water-soluble homogeneous catalyst, and n-octyl aldehyde and ammonia water as raw materials to generate an amination reaction in a pipe reactor under a hydrogen atmosphere. The amination reaction includes two-step series reactions of dehydration and hydrogenation. N-octylamine is obtained. The water-soluble homogeneous catalyst is composed of a 3d metal salt, an EDTA type ligand, a promoter and water. The application has the advantages of high yield, low cost, simple process, no three-waste emissions and facilitation of industrialization expansion.

The invention provides a bee luring agent, a bee luring method and application of the bee luring agent, and belongs to the technical field of bee luring agents. The bee luring agent comprises an active component and a solvent, the active ingredients comprise diethylene glycol monobutyl ether, decane, cyclohexane, isovaleraldehyde, n-nonanal, methyl heptenone, dipropylene glycol, 3-hydroxy-2-butanone, n-hexadecane, benzothiazole, 1-octanal, phenethyl alcohol and benzyl alcohol. When the bee luring agent is sprayed to inflorescence, bees can be attracted to increase the number of flower visiting times, pollination is promoted, and then fruit setting and yield are improved. The active ingredients in the bee luring agent are easy to obtain, the dosage is trace and accurate, the attraction effect is better than that of single flower aroma component limonene with the same concentration or higher concentration, and the bee luring agent has the comprehensive advantages of cost and effect.

The application belongs to the technical field of organic synthesis, and specifically discloses a preparation method of alpha-hexyl cinnamic aldehyde; under the protection of nitrogen, tert-butyl alcohol, ethanol and water are used as solvents, potassium hydroxide and PEG-400 are used as catalysts, benzaldehyde is reacted with n-octyl aldehyde at 60 DEG C for 6 hours, and then extraction, acidolysis, solvent recovery, drying, and vacuum distillation are carried out to collect a fraction at 175-176 DEG C to obtain the alpha-hexyl cinnamic aldehyde. The application adds tert-butyl alcohol in the solvent, and due to the steric hindrance effect, the condensation of n-octyl aldehyde and the product alpha-hexyl cinnamic aldehyde itself can be effectively prevented, and the yield of synthesis is effectively improved. Through process adjustment, the water phase in the solvent and the water phase in the acidolysis solution can be recycled and applied, and the discharge of waste water is greatly reduced.

The present application relates to the technical field of high-performance coating, in particular to a waterproof and anticorrosive coating and a preparation method thereof.The present application overcomes the problem that the waterproof requirement of high compactness and the long-acting anticorrosive requirement are difficult to be considered simultaneously.The coating is prepared by mixing component A and component B;polyvinyl alcohol is doubly grafted by n-octyl aldehyde and perfluorooctyl triethoxysilane, so that the problem of poor water resistance of polyvinyl alcohol is solved from the molecular level;the synergistic anticorrosive mechanism of physical barrier and chemical corrosion inhibition is constructed by using graphene oxide loaded with benzotriazole;highly compact interpenetrating network structure is constructed by using organic bismuth catalysis;and the excellent waterproofness, salt spray resistance and high adhesion of the coating are realized by using stearic acid modified nano titanium dioxide and specific hierarchical shear orientation process.

The invention provides a nickel-based catalyst and a preparation method and application thereof, the catalyst comprises nickel metal, aluminum oxide and graphene oxide, the content of the nickel metal accounts for 30-80 wt% of the total mass of the catalyst, the dispersity of the nickel metal in the catalyst is 10-20%, and the most probable pore size of the catalyst is 30-100 nm. The catalyst provided by the invention has a relatively high conversion rate on isooctenal, has relatively good selectivity on isooctanal, is mild in application condition, and is suitable for industrial production of isooctanal.