11 results about "Isocaproic acid" patented technology

The application relates to the chemical process field and discloses a catalyst with a function of reducing chroma and a method for preparing isooctanoic acid. The catalyst and the method for synthesizing isooctanoic acid can reduce the chroma of isooctanoic acid products and downstream products prepared by using isooctanoic acid as raw materials after long-time storage, improve product quality, reduce the requirement of the raw material storage environment, thereby reducing the cost and improving the benefit.

This invention discloses a highly efficient catalytic synthesis method for isooctanoic acid, belonging to the field of isooctanoic acid preparation technology. The highly efficient catalytic synthesis of isooctanoic acid includes the following steps: N1: Mixing n-butyraldehyde and a bifunctional solid catalyst, introducing hydrogen gas, and heating to 110-130℃ for 5-7 hours, followed by post-treatment to obtain isooctaldehyde; adding a phosphomolybdate catalyst to isooctaldehyde, introducing air, stirring, and heating to 50-60℃ for 3-5 hours, followed by post-treatment to obtain isooctanoic acid; the bifunctional solid catalyst is Ni / MgO-TiO2; the phosphomolybdate catalyst is Cs. 1.5 H 1.5 PMo 12 O 40 @SiO2. The preparation process of isooctanoic acid in this invention exhibits good n-butyraldehyde conversion and yield, and the catalyst is easily recovered and reused, which is beneficial for industrial conversion applications.

The application provides a fluorinated cyclodextrin macromolecular adsorbent and a preparation method and application thereof, and belongs to the technical field of lithium ion adsorbents, and aims to solve the technical problems of poor lithium ion adsorption effect and low selectivity of existing lithium adsorbents. The preparation steps of the application comprise the following steps: firstly, dissolving beta-cyclodextrin in an organic solvent and reacting with 2-bromoisobutyryl bromide to obtain an intermediate product bromoisobutyryl beta-cyclodextrin; and then, performing a polymerization reaction on the bromoisobutyryl beta-cyclodextrin with a fluorine-containing monomer, copper bromide, N,N,N',N",N"-pentamethyldiethylenetriamine and tin (II) isooctoate to obtain a beta-cyclodextrin adsorption material with a surface grafted fluorine-containing polymer chain. The preparation method has the advantages of simple process and mild reaction conditions. The adsorption material has a high lithium ion adsorption capacity, which can reach 43.5 mg / g, and can efficiently and selectively recover lithium ions from a complex solution containing competitive ions such as sodium, potassium, magnesium, calcium and cobalt.

This invention relates to a method for the catalytic preparation of 1,5-pentamethylene diisocyanate trimer, belonging to the field of organic synthesis and polymer materials technology. Addressing the problems of poor catalyst selectivity and the tendency to generate pentamers and higher polymers in existing PDI trimer synthesis processes, leading to increased product viscosity and decreased NCO content, this invention proposes using potassium isooctanoate catalyst under nitrogen protection. The purified PDI monomer is heated to 90°C, and 0.8‰ (based on the mass of PDI monomer) of catalyst is rapidly added dropwise. The reaction is controlled until the NCO conversion reaches 30%, then a terminator is added to terminate the reaction, followed by molecular distillation to remove residual monomers. Gel permeation chromatography (GPC) analysis shows that the obtained product contains 29.46% trimer, and the contents of pentamers, heptamers, and high polymers (n≥9) are 5.74%, 2.12%, and 5.90%, respectively. This invention achieves highly selective synthesis of PDI trimer, producing a product with low viscosity and high NCO content, which can be used as a curing agent for high-performance polyurethane coatings and has promising industrial application prospects.

This invention discloses a method for preparing molybdenum isooctanoate catalyst with high molybdenum content using a bubbling process. The method employs nitrogen bubbling and hydrogen reduction techniques. Nitrogen bubbling rapidly removes water vapor and acetic acid generated during dehydration from the reaction system, which is more efficient and stable than static heating or slow vacuuming. It also aids in mixing, ensuring more thorough contact of reactants and inhibiting excessive aggregation of molybdenum species. Nitrogen bubbling provides an inert environment, maintaining the stability of the reaction system. Hydrogen reduction effectively suppresses acetylation side reactions and precipitation formation, and precisely guides the formation of highly dispersed dimer or oligomer structures. The molybdenum isooctanoate catalyst prepared by this process exhibits high stability, high dispersibility, and high molybdenum content.

The application relates to the chemical process field and discloses a method for hydrofining isooctanoic acid, which comprises the following steps: in the presence of a reduction catalyst, crude isooctanoic acid is contacted with hydrogen to perform a reduction reaction. By using the method for hydrofining isooctanoic acid provided by the application, the product quality can be improved by completely removing substances containing carbon-carbon double bonds and aldehyde ketone carbonyl in the reaction system, the product can keep stable for a long time, the content of isooctanoic acid isooctyl ester in heavy components obtained through rectification is obviously reduced, the residual liquid after separation of isooctanoic acid only contains isooctanoic acid and a catalyst, and the residual liquid can be directly recycled as the catalyst without separation and purification, so that the operation process is simplified.

The application discloses a low-roughness dispersion resin for electrophoretic paint, preparation of the dispersion resin and an electrophoretic color paste, electrophoretic paint containing the dispersion resin. The dispersion resin comprises 8.91-9.60 parts by weight of aromatic epoxy resin, 12.00-13.09 parts by weight of aliphatic epoxy resin, 2.53-3.01 parts by weight of bisphenol A, 2.07-2.27 parts by weight of iso-octanoic acid, 0.06-0.08 parts by weight of a catalyst, 1.99-2.30 parts by weight of a primary amine, 0.85-0.96 parts by weight of a neutralizing agent and 66.56-73.80 parts by weight of pure water. The electrophoretic paint prepared from the dispersion resin has excellent edge protection capability and low surface roughness, and can meet the requirements of a whole vehicle body on a bottom electrophoretic coating under current zirconium or silane thin film pretreatment conditions.

This invention provides an ultra-thin, ultra-fast repair material for MMA polymer pavement, along with its preparation and application methods. The material comprises component A and component B. Component A includes methyl methacrylate, acrylic resin, n-butyl methacrylate, 2-ethylhexyl acrylate, urethane acrylate, hydroxypropyl methylcellulose, a composite reinforcing agent, pigments, an ultraviolet shielding agent, and a dispersant. Component B includes benzoyl peroxide, methyl ethyl ketone peroxide, cobalt naphthenate, zinc isooctanoate, and dibutyl phthalate. This ultra-thin, ultra-fast repair material, through optimization of the composite initiator-promoter system, extends the application temperature range to -30°C to 35°C, solving the problems of traditional materials being unable to be applied in winter and the poor durability of thin-layer repair materials. Furthermore, it maintains high curing speed, high strength, and high durability even at low temperatures.

This invention discloses a highly active and stable vanadium isooctanoate and its preparation method, comprising the following steps: S1, in a reactor, vanadium metal powder, isooctanoic acid, and an iron-based catalyst are mixed, heated, and an aqueous solution of tert-butyl hydrogen peroxide is added to carry out an oxidation reaction; S2, after the oxidation reaction is completed, ferric isooctanoate is added to the reaction system to carry out a valence state control reaction; S3, post-treatment is performed to obtain a vanadium isooctanoate solution. This invention uses tert-butyl hydrogen peroxide as an oxidant and an iron compound as a catalyst to oxidize vanadium metal powder to V... 3+ At the same time, a small amount of ferric isooctanoate (III) is added to further improve the activity of vanadium isooctanoate and greatly improve production efficiency; ferric isooctanoate (III) is reduced to ferrous isooctanoate (II), which improves the stability of vanadium isooctanoate. The vanadium-iron compound can further improve product performance, and isoascorbic acid stabilizer is added to prevent performance degradation and precipitation of vanadium isooctanoate during storage.

This invention relates to the field of silicone rubber preparation technology, and discloses a flexible, skin-friendly data cable sheath material and its preparation method. The flexible, skin-friendly data cable sheath of this invention comprises the following raw materials in parts by weight: 100 parts methyl vinyl silicone rubber, 5-12 parts modified polyisobutylene, 5-10 parts polyester polyether elastomer, 5-10 parts modified silica powder, 4-12 parts fumed silica, 5-15 parts silazane, 4-8 parts aluminum hydroxide, 0.5-1 part antioxidant, 1-10 parts phenyl hydroxyl silicone oil, 1-10 parts zinc isooctanoate, and 0.5-2.5 parts vulcanizing agent. The modified silica powder of this invention imparts a delicate texture and a smooth, skin-friendly feel to the material; the polyester polyether elastomer provides excellent flexibility, preventing cracking and other problems during daily use.