14 results about "METHYL STEARATE" patented technology

The invention belongs to the technical field of phase change concrete, and particularly relates to a preparation method of composite phase change concrete. The invention provides a composite phase change aggregate. The composite phase change aggregate comprises a porous adsorption material, a composite phase change material and a packaging material, the porous adsorption material comprises expanded vermiculite; the composite phase change material comprises methyl palmitate (MP) and methyl stearate (MS); the packaging material comprises epoxy resin or styrene-acrylic emulsion. The composite phase change aggregate has excellent phase change temperature and latent heat of phase change, still has good thermal stability after multiple cycles, and meanwhile, the composite phase change aggregate replaces fine aggregate to be used for preparing concrete, and the prepared concrete shows good phase change cycle strength stability and heat conduction stability.

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 application discloses a preparation method of a stearylbenzoyl methane derivative, and the method steps are as follows: S1, adding a potassium tert-butoxide solution dissolved in an organic solvent to a phenylethanone derivative for activation under an inert atmosphere; S2, stirring the mixture after heating, and then adding methyl stearate dissolved in an organic solvent for reaction; S3, adding deionized water to quench the reaction after the reaction is completed, adjusting the pH to be acidic to precipitate solid materials, and obtaining the stearylbenzoyl methane derivative through vacuum filtration, washing and drying. The application uses phenylethanone derivatives and methyl stearate as raw materials, uses a solvent effect to enhance the activity of a catalyst, overcomes the problems of low yield and poor selectivity caused by para-substituted phenylethanone derivatives in a synthesis process, successfully synthesizes the stearylbenzoyl methane derivative with high yield and purity, and has the advantages of simple operation, good synthesis selectivity, mild reaction conditions and the like, and can improve the utilization rate of raw materials and reduce resource waste.

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 an environment-friendly fabric softening and flame-retardant composition and a preparation and application method thereof, and relates to the technical field of fabric treatment, the environment-friendly fabric softening and flame-retardant composition is prepared from the following components by weight: 15-25 parts of an environment-friendly softening agent basic component; 20 to 30 parts of a composite flame retardant; 8-15 parts of a natural fiber reinforced component; 0.5 to 1.5 parts of an antistatic agent; 0.3 to 0.5 part of an antioxidant compound system; and 1-3 parts of a cross-linking agent. The environment-friendly softening agent base component is adopted, methyl stearate trimethyl ammonium chloride serves as a biodegradable quaternary ammonium salt softening agent, long-chain alkyl in the molecular structure of methyl stearate trimethyl ammonium chloride is adsorbed to the surface of the fiber through Van der Waals force, a lubricating layer is formed, the friction coefficient of the fabric is remarkably reduced, and compared with traditional double-long-chain quaternary ammonium salt, the softening agent has the advantages that the softening agent is environmentally friendly; the single-long-chain structure maintains the soft effect, reduces the charge accumulation on the surface of the fabric, and provides a basis for the antistatic performance.

The invention belongs to the technical field of polymer material additives, and specifically discloses a long-acting flame retardant and anti-aging additive, a preparation method and application thereof. The invention comprises the following steps: firstly, 4-hydroxy-2,2,6,6-tetramethylpiperidine nitroxide free radical is reacted with trimethyl (trifluoromethyl) silane to obtain 2,2,6,6-tetramethyl-1-trifluoromethoxy-4-piperidinol; then, the 2,2,6,6-tetramethyl-1-trifluoromethoxy-4-piperidinol is reacted with methyl stearate through an ester exchange reaction to obtain the long-acting flame retardant and anti-aging multifunctional additive. The dual-functional integrated additive can impart both good flame retardancy and good aging resistance to materials because its molecules contain both the high-efficiency flame retardant element fluorine and the free radical scavenger tetramethylpiperidine structure. The long octadecyl chain contained in the structure can increase compatibility with a matrix resin, improve the easy precipitation and migration phenomena of conventional additives, and effectively solve the problems existing in the prior art of developing flame retardant and anti-aging high-performance materials.

The invention discloses a stearoylbenzoylmethane raffinate recovery device and process, and belongs to the technical field of distillation recovery. Comprising a tank body, a liquid inlet pipe is inserted into the top of the tank body in a penetrating mode, a mixing tank slidably connected with the liquid inlet pipe is arranged in the tank body, and an end plate located below the mixing tank is fixed in the liquid inlet pipe. The side reaction under the traditional high-temperature distillation is avoided. The liquid distributor is accurately controlled by combining the lifting assembly, the opening assembly and the sealing assembly, uniform distribution of liquid in the evaporation pipe is achieved, the local dry wall or liquid accumulation phenomenon is avoided, and therefore accumulation of residual impurities is reduced.

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 present disclosure relates to the technical field of multifunctional phase change material, and particularly relates to a phase change microcapsule with two-stage temperature control capability and a preparation method thereof.The phase change microcapsule in the present disclosure comprises the following components by weight: methyl stearate (MS) 100 parts; polyethylene glycol (PEG) 50-70 parts; polycarbonate diol (PCDL) 20-40 parts; isophorone diisocyanate (IPDI) 15-30 parts; emulsifier 5-10 parts; heat-conducting filler 1-5 parts; crosslinking agent 0.5-1 part.The phase change microcapsule takes MS as the core, and takes the three-block polyurethane composed of IPDI, PCDL and PEG as the shell, and is endowed with the two-stage temperature control capability, so that it has great application value in the field of lithium battery thermal management.

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.

The application provides a high-efficiency oil-removing water purifying agent and a preparation method thereof. The oil-removing water purifying agent mainly comprises micro-crosslinking multi-branched cationic copolymer, fatty acid methyl ester ethoxylate, dodecyl dimethyl benzyl ammonium chloride and deionized water; the micro-crosslinking multi-branched cationic copolymer is prepared from non-polar solvent, branched monomer, crosslinking monomer, acrylamide, cationic monomer, emulsifier, initiator, organic solvent and deionized water; and the fatty acid methyl ester ethoxylate is prepared from methyl stearate, catalyst, ethylene oxide, isopropyl alcohol and deionized water. The high-efficiency oil-removing water purifying agent is mainly aimed at the defects of the existing oil-removing water purifying agent, uses the micro-crosslinking multi-branched cationic copolymer as a flocculant, uses the fatty acid methyl ester ethoxylate as a non-ionic surfactant, and through the synergistic effect of the two, so that the prepared oil-removing water purifying agent has better oil-removing effect and dispersion performance.