32 results about "Palmoxiric Acid" patented technology

Disclosed are: surface-treated calcium carbonate which can impart a high viscosity and high thixotropic properties to a paste-like resin composition when added to the composition and can impart good mechanical properties and good adhesion properties to a cured product of the paste-like resin composition; and a paste-like resin composition containing the surface-treated calcium carbonate. The surface-treated calcium carbonate is produced by treating the surface of calcium carbonate with a surface-treating agent comprising a sodium salt or a potassium salt of a fatty acid, is characterized in that the sum total of PW and SW (PW + SW) is 90 or more and the ratio of PW to SW (PW / SW) falls within the range from 0.30 to 1.1 inclusive (wherein PW represents the content (wt%) of the sodium salt or the potassium salt of palmitic acid in the surface-treating agent in terms of acid content; and SW represents the content (wt%) of the sodium salt or the potassium salt of stearic acid in the surface-treating agent in terms of acid content), and is also characterized in that SA2 falls within the range from 15 to 48 inclusive and the ratio of FA to SA2 (FA / SA2) falls within the range from 0.095 to 0.135 inclusive (wherein SA2 represents the BET specific surface area (m2 / g) of the surface-treated calcium carbonate; and FA represents the amount of the sodium salt or the potassium salt of the fatty acid to be used for the treatment in terms of acid content relative to 100 parts by weight of calcium carbonate).

The invention provides a method for preparing vitamin A palmitate by enzyme catalysis, and relates to a synthesis method of vitamin A palmitate. The method comprises the following steps of (1) dissolving the vitamin A palmitate and low-grade fatty alcohol palmitate into an organic solvent, and adding lipase; (2) performing vacuum pumping from a condenser, performing enzyme catalysis ester exchange reaction, and separating out a reaction byproduct of low-grade fatty alcohol acetate and an organic solvent through a rectifying column; (3) removing lipase from reaction material liquid, adding an adsorbent for adsorbing remained low-grade fatty alcohol palmitate, and filtering out the vitamin A palmitate solution; and (4) performing organic solvent reduced pressure evaporation to obtain the vitamin A palmitate. The oxidation cannot easily occur; meanwhile, the enzyme catalysis ester exchange is used during the reaction; the reaction conditions are mild; the side reactions can be effectively inhibited; the operation is simple; the reaction yield is high; and the product quality is high.

The invention discloses a method for synthesizing 1-(6-nitrobenzimidazolyl)ethyl palmitate on line under the catalysis of lipase. The method comprises the steps of with 6-nitro-benzimidazole and vinyl palmitate which are in the molar ratio of 1:(1-8) as raw materials, 0.5-1.0g of lipase Lipozyme TLIM as a catalyst and a DMSO solvent as a reaction solvent, uniformly filling a reaction channel of a microfluidic channel reactor with the lipase Lipozyme TLIM, wherein the internal diameter of the reaction channel of the microfluidic channel reactor is 0.8-2.4mm, and the reaction channel is 0.5-1.0m long; and continuously introducing the raw materials and the reaction solvent to the reaction channel to carry out Markovnikov addition reaction, controlling the reaction temperature at 40-55 DEG C and the reaction time at 20-35 minutes, collecting a reaction solution on line, and carrying out conventional treatment on the reaction solution to obtain 1-(6-nitrobenzimidazolyl)ethyl palmitate. The method has the advantages of short reaction time, high selectivity and high yield.

Provided is a method for preparing 1,3-dioleoyl-2-palmitoylglycerol in a subcritical system, comprising the following steps: (1) preparation of raw materials: selecting, as a raw material A, lard having a cholesterol content of less than 0.05% by mass, or selecting, as raw material A, restructured palm oil having an sn-2 palmitic acid content of not less than 60% by mass; and, selecting as a raw material B, at least one of oleic acid and an oleic acid ester; and (2) subcritical enzyme-catalyzed transesterification: in a subcritical system, enabling raw materials A and B to undergo selective enzymatic transesterification in a reaction solvent under the catalysis of lipase to obtain 1,3-dioleoyl-2-palmitoylglycerol. With a rapid reaction rate, high selectivity, minimal enzyme usage, and no solvent residue, this method is readily adapted to large-scale continuous production.