7 results about "METHYL STEARATE" patented technology

This invention discloses a method for preparing high-quality bio-based 1,9-nonanediol, comprising the following steps: transesterification, precipitation, fatty acid methyl ester refining, ozone oxidation pyrolysis, solvent recovery, esterification, dimethyl azelaate refining, and hydrogenation to obtain high-quality bio-based 1,9-nonanediol. This invention achieves gradient and full-component utilization of vegetable oil raw materials: the oil-based portion of triglycerides is used to produce high-quality bio-based 1,9-nonanediol, while simultaneously producing byproducts such as methyl palmitate, methyl stearate, propionic acid, hexanoic acid, and nonanoic acid; the glycerol-based portion of triglycerides is used as a byproduct of glycerol production. This invention utilizes esterification to reconstruct the products of ozone oxidation pyrolysis, converting the high-boiling-point monomethyl azelaate into the low-boiling-point dimethyl azelaate, achieving efficient separation from saturated fatty acid methyl esters. The dimethyl azelaate, as a raw material, is then hydrogenated to obtain high-quality nonanediol, significantly reducing production costs.

The invention belongs to the technical field of biochemical synthesis, and particularly relates to a preparation method of high-purity methyl stearate. The preparation method of the high-purity methyl stearate comprises the following steps: carrying out esterification reaction by taking stearic acid and methanol as raw materials and immobilized lipase as a catalyst, and purifying the product to obtain the methyl stearate. The esterification reaction can be completed at normal pressure and a relatively low temperature (50-70 DEG C), and the method has the advantages of low energy consumption and safe operation. The catalyst immobilized lipase used in the esterification reaction process can be separated from the product through simple filtration, and can be repeatedly used in multiple batches without significant reduction of activity, so that the preparation cost can be effectively reduced.

The application belongs to the technical field of traditional Chinese medicine detection, and specifically provides a construction method of a characteristic chromatogram of fatty acid components in Zhi Yinyanghuo and application thereof. The application screens gas chromatography conditions and a pretreatment procedure of a test sample through a large number of experiments, screens four characteristic peaks of fatty acids, and realizes effective separation of four characteristic peaks of methyl myristate, methyl palmitate, methyl oleate and methyl stearate, with good peak shape, stable baseline and high resolution, thereby providing a basis for quality detection and control of fatty acid components in Zhi Yinyanghuo and preparations thereof. Through methodology investigation, the precision and intermediate precision of the instrument are good, and the repeatability, specificity and durability of the method are good, thereby meeting the determination requirements. The method can also be used to distinguish raw products and processed products, and is helpful for accurate medication in clinic.

The present invention relates to the use of fatty acid esters in deterring oviposition by cotton bollworms. In particular, the use of a combination of methyl palmitate, methyl stearate and methyl oleate in deterring oviposition by cotton bollworms.

The invention discloses a preparation method of high-quality bio-based 1, 9-nonanediol, which comprises the following steps: sequentially carrying out transesterification reaction, sedimentation, fatty acid methyl ester refining, ozone oxidation cracking reaction, solvent recovery, esterification reaction, dimethyl azelate refining and hydrogenation reaction on raw material vegetable oil to obtain the high-quality bio-based 1, 9-nonanediol. Gradient and full-component utilization of vegetable fat raw materials is achieved, the fat-based part of triglyceride is used for producing high-quality bio-based 1, 9-nonanediol, and meanwhile byproducts such as methyl palmitate, methyl stearate, propionic acid, hexanoic acid and nonanoic acid can be produced; the glyceryl moiety of the triglyceride is used to byproduct a glycerol product. According to the present invention, the esterification reaction is adopted to reconstruct the ozone oxidation cracking reaction product, the azelaic acid monomethyl ester with the high boiling point is converted into the azelaic acid dimethyl ester with the low boiling point so as to achieve the efficient separation of the azelaic acid monomethyl ester and the saturated fatty acid methyl ester, the azelaic acid dimethyl ester is adopted as the raw material, and the hydrogenation reaction is performed to obtain the high-quality nonanediol product so as to substantially reduce the production cost.

The invention discloses a high-performance antistatic agent for polyolefin and a preparation method thereof.The preparation method comprises the following steps that diethanol amine and a catalyst are added into a reaction kettle, heated, stirred and dissolved, and a first solution is obtained; the catalyst comprises at least one of tetramethylammonium hydroxide and ammonium bicarbonate; slowly dropwise adding methyl stearate into the solution I at a certain temperature, and carrying out heat preservation reaction after dropwise adding; and after the reaction is finished, decoloring the reaction liquid, filtering, reducing pressure and removing low content to obtain the high-performance antistatic agent for polyolefin. The method provided by the invention can eliminate the residue of low-molecular components, solves the problem of precipitation of low-molecular substances in polyolefin, eliminates the residue of a basic catalyst, and improves the application performance of the product; meanwhile, the reaction process is mild, environment-friendly and low in energy consumption.

The invention relates to the technical field of biomass catalytic conversion, and discloses a preparation method of a hydrophobic Ni-Al2O3 (at) mSiO2-C catalyst and application of the hydrophobic Ni-Al2O3 (at) mSiO2-C catalyst in a fatty acid hydrodeoxygenation reaction. The preparation method comprises the following steps: loading metal Ni on aluminum oxide by adopting a coprecipitation method, coating a layer of mesoporous silica with a high specific surface area on the surface of the aluminum oxide by taking a surfactant as a template agent, and finally reacting a silane reagent with the surface mesoporous silica to form a hydrophobic layer. The prepared hydrophobic metal catalyst is used for preparing alkane through stearic acid hydrodeoxygenation, the catalytic conversion efficiency is high, and the catalyst stability is high. The prepared catalyst is used for hydrodeoxygenation reaction of oleic acid, methyl stearate, arachidic acid and the like, and the reaction activity and stability are high. The active components on the hydrophobic Ni-Al2O3 (at) mSiO2-C catalyst are high in dispersity, good in stability and easy to recover.