13 results about "Glycerolysis" patented technology

The present application belongs to the field of light industry grease, and discloses a preparation method of diglyceride. The present application carries out pretreatment on the immobilized enzyme carrier, mixes free lipase and glycerol according to a certain proportion, adds the immobilized carrier into the mixed solution of the lipase and glycerol, and carries out immobilization through the adsorption method, so that the immobilized enzyme which has catalytic characteristics and can be used as a reaction substrate is prepared. The obtained immobilized enzyme can be used for the continuous production of diglyceride in a packed bed reactor. Compared with the traditional enzyme method for catalyzing glycerolysis reaction to prepare diglyceride, the immobilized enzyme obtained by the present application not only has catalytic effect, but also has enough glycerol adsorbed on the immobilized enzyme which can be used as a substrate to carry out glycerolysis reaction, so that the reaction efficiency is improved. Not only the problems of difficult recovery and poor reusability of free enzyme are solved, but also the problem of difficult continuous production due to the large viscosity of glycerol in production is solved.

The invention belongs to the technical field of food processing, and discloses preparation and application of a thermal processing adaptive type massive fat simulant based on protein fibers and sodium alginate. The method comprises the following steps: firstly, carrying out glycerolysis on palm liquid oil by using lipase to obtain glycerolysis lipid with the content similar to that of lard solid fat; protein fibers and sodium alginate form a compound, in the emulsifying process, glycerolysis lipid is evenly dispersed in a continuous phase of the compound, an egg box cross-linked network structure is assembled under induction of calcium ions, the effects of solidifying grease and maintaining a compact and stable three-dimensional gel network are achieved under the high-temperature condition, and the fat simulant is endowed with the high elasticity. Meanwhile, due to the interface adhesiveness of the glycerolysis lipid oil drops and a polymer network, liquid drop coalescence and migration under the heating condition are inhibited. The obtained blocky fat simulant has good gel strength and thermal stability, can slowly release grease in a dynamic heating environment, keeps structural integrity, and can realize simulation and replacement of animal fat blocks in meat products.

This invention discloses a foamed SiO2 enzyme array and its application in the preparation of diglyceride edible oil, belonging to the field of oleochemical technology. This invention prepares a hydrophobic foamed SiO2 carrier (MCF-C8), and loads lipases ANL, NE, and CALB separately using a physical adsorption method to prepare three functionally specific enzyme arrays. Then, a dual-coupling reaction strategy of "hydrolysis-esterification" and "glycerolysis-esterification" is constructed. ANL@MCF-C8 catalyzes the moderate hydrolysis of vegetable oil, or NE@MCF-C8 catalyzes the glycerolysis of vegetable oil, to obtain a primary diglyceride mixture. The byproduct fatty acids produced in the reaction are recovered and esterified with glycerol under the catalysis of CALB@MCF-C8 to obtain a secondary diglyceride mixture. After purification, an edible oil product with a diglyceride content of 40%~82% and a 1,3-diglyceride content of 90% is obtained. This invention achieves efficient recovery and utilization of byproduct fatty acids, improves product yield, and the enzyme array has strong stability, is easy to separate and recover, and can be reused, effectively reducing production costs.

A process for the generation of renewable fuel and / or biofuel from a renewable oil feedstock having a high free fatty acid content. The renewable oil feedstock can be renewable plant oil or renewable animal fat or oil, including renewable corn oil recovered from a by-product of ethanol production, such as distillers corn oil and / or corn oil solvent extracted from distillers dried grains with solubles (DDGS) and / or distillers dried grains (DDG). The free fatty acid content of the renewable oil feedstock can be reduced by a glycerolysis process in the presence of a molar excess of glycerin to provide an adequate resulting feedstock having a reduced free fatty acid content. The resulting feedstock capable of being subjected to further processing for the generation of renewable fuel and / or biofuel.

A preparation method for a stable diacylglycerol oil, a stable diacylglycerol oil prepared thereby, and a use. The method comprises the following steps: carrying out moderate glycerolysis on a vegetable oil; and first carrying out molecular distillation purification on crude diacylglycerol obtained by means of glycerolysis and then carrying out a fractionation modification process. A diacylglycerol isomer composition is prepared by controlling the degree of glycerolysis and the fractionation process. Compared with other processes, the diacylglycerol oil is prepared by controlling the degree of the glycerolysis and the fractionation conditions, in particular the content of diacylglycerol and the proportion of 1,3 / 1,2 diacylglycerol, and when the diacylglycerol oil is used as a thermally processed cooking oil, the oxidation stability is significantly improved, thereby significantly reducing the formation of risk factors.

The invention belongs to the technical field of biological catalysis and food grease, discloses a method for efficiently producing diglyceride through nano-enzyme catalysis glycerolysis, and solves the technical problems of low reaction efficiency, high enzyme dosage and poor enzyme reutilization capability in preparation of diglyceride through enzyme catalysis. The preparation method comprises the following steps: carrying out covalent cross-linking on lauryl gallate (LG) and chitosan (CS) by a free radical induction method to form an LGCS cross-linked substance; forming nano particles (LGCS NPs) through a self-assembly method; lGCS NPs nano-particles are used as a carrier, genipin is used as a biological cross-linking agent, and free lipase is fixed on the nano-particle carrier to form the nano-enzyme. The prepared nano-enzyme has the characteristics of good hydrophobicity, good dispersibility, high stability and high catalytic activity, and can effectively improve the problem of insufficient contact between the traditional immobilized enzyme and a fat-soluble substrate, so that the glycerolysis reaction efficiency and the reutilization rate of a biocatalyst are remarkably improved.

A reactive calcium oxide (CaO) catalyst for catalytic applications is disclosed. The catalyst comprises calcium oxide particles exhibiting rod-like and dumbbell-shaped morphologies and particle characteristics associated with enhanced catalytic activity in monolaurin synthesis. The catalyst possesses reduced particle agglomeration and increased accessible surface area relative to calcium oxide materials produced under non-optimized calcination conditions. In certain embodiments, the catalyst exhibits an average particle size in the nanometer range suitable for glycerolysis reactions. The reactive calcium oxide catalyst may be derived from thermal decomposition of calcium hydroxide precursor material and is suitable for use in monolaurin production and related catalytic processes.

Methods and apparatus for economically producing a biodiesel product from feedstocks. Some embodiments comprise using at least one of a crude feedstock pretreatment process and a free fatty acid refining process prior to transesterification and the formation of crude biodiesel and glycerin. The free fatty acid refining process may include introducing the feedstock to glycerolysis to obtain a glycerolysis product then stripping the glycerolysis product to produce a fatty acid distillate and a stripped feedstock. The fatty acid distillate is recycled to the glycerolysis process to create more higher-molecular weight glycerides and the stripped feedstock (mostly di- and tri-glycerides) proceeds to transesterification to make biodiesel.

Provided is a method for producing a transesterified oil or fat having a high purity of diacylglycerol while carrying out a glycerol alcoholysis reaction at a low temperature. A method for producing a transesterified oil or fat, said method comprising a step in which an oil or fat and glycerol are reacted at a reaction temperature of 90-165 DEG C (inclusive) with the ratio of the number of moles of fatty acid groups to the number of moles of glycerol groups [FA / GLY] being 0.30-1.7 (inclusive) in the presence of a calcium-based catalyst.

The invention discloses a foam SiO2 enzyme array and application thereof in preparation of diglyceride edible oil, and belongs to the technical field of grease chemistry. A hydrophobic foam SiO2 carrier (MCF-C8) is prepared, lipase ANL, lipase NE and lipase CALB are loaded through a physical adsorption method, three functional specific enzyme arrays are prepared, then a hydrolysis-esterification and glycerolysis-esterification double-coupling reaction strategy is constructed, proper hydrolysis of vegetable oil is catalyzed through ANL (at) MCF-C8 or glycerolysis of the vegetable oil is catalyzed through NE (at) MCF-C8, and therefore the functional specific enzyme arrays are obtained. A primary diglyceride mixture is obtained; and recovering a byproduct fatty acid generated in the reaction, and carrying out esterification reaction on the byproduct fatty acid and glycerol under the catalysis of CALB (at) MCF-C8 to obtain a secondary diglyceride mixture. And purifying to obtain an edible oil product in which the content of diglyceride is 40-82% and the proportion of 1, 3-diglyceride is 90%. According to the method, efficient recycling of the by-product fatty acid is achieved, the product yield is increased, the enzyme array is high in stability, easy to separate and recycle and capable of being repeatedly used, and the production cost is effectively reduced.

The application discloses a kind of metal organic framework ZIF-8 fixed enzyme and its preparation method and application in preparation of diglyceride, to provide a kind of can effectively improve enzyme stability and the reuse of fixed enzyme, with the characteristics of simple operation, mild condition, can effectively promote edible oil preparation rich in diglyceride component edible oil while retaining enzyme activity, its prepared diglyceride edible oil byproduct is less, active ingredient is higher;Its technical scheme is that aspergillus niger lipase is added to zinc nitrate solution, is uniformly dispersed, then, slowly 2-methylimidazole solution is added, uniform speed stirring 60min, stationary 20min, the product is centrifuged, washed, freeze-dried to obtain fixed enzyme;Then raw material oil and glycerol are mixed, emulsified, then ZIF-8 fixed enzyme is added, glycerolysis reaction is carried out at 40~70℃ for 2~12h, after reaction, fixed enzyme is centrifuged, liquid is purified by molecular distillation, and DAG-rich edible oil is obtained;It is related to food technology field.

This invention relates to the field of chemical preparation technology, and in particular to a camellia oil-based diglyceride for weight loss and its preparation method. The invention involves passing a raw material sample through a funnel at several preset temperatures, recording the time taken for the sample to pass through the funnel, calculating parameters characterizing the effect of temperature, conducting a glycerolysis reaction in the raw material to obtain a reaction solution, determining whether the reaction temperature needs adjustment, stirring the reaction solution at preset time intervals to obtain the stirring force value, and obtaining the color value of the reaction solution at preset time intervals, calculating parameters characterizing the reaction progress, and determining whether the reaction is complete. The product in the reaction solution is purified by molecular distillation to obtain camellia oil-based diglyceride. This invention improves the preparation efficiency of camellia oil-based diglyceride by adjusting the reaction temperature based on the influence of temperature on the flowability of the raw material and judging the reaction progress by obtaining changes in the viscosity and color value of the reaction solution.

The invention discloses a preparation method and application of flaxseed diglyceride oil. The method comprises the following steps: mixing linseed oil with glycerol, and carrying out catalytic glycerolysis reaction by adopting a compound enzyme system consisting of lipase TL 100L and CALB according to a weight ratio of 9: 8 to generate an intermediate product mixture with high monoglyceride content, high diglyceride content and low triglyceride residual quantity, thereby laying a foundation for subsequent efficient purification; and centrifuging the reaction product to remove impurities, and sequentially carrying out two-stage molecular distillation purification. The content of diglyceride in the finally prepared flaxseed diglyceride oil product is higher than 80%. The process conditions are mild, high-purity products can be efficiently prepared, active ingredients of the linseed oil are reserved to the maximum extent, and the prepared diglyceride oil has a good application prospect in preparation of products with the function of lowering lipid and / or reducing blood sugar.