61 results about "Glycerolysis" patented technology

A system and method for converting a high free fatty acid grease feedstock to biodiesel. The process comprises a glycerolysis reaction to convert free fatty acids to glycerides and a base catalyzed transesterification reaction to produce fatty acid methyl esters and glycerin in the absence of solvents. In preferred embodiments, both glycerin and methanol are recycled. The process can process a feedstock containing up to 100 percent free fatty acid content to produce biodiesel and glycerin with minimal waste generation.

A mono-, di-, and triglyceride emulsifier is provided that is obtained by the interesterification or glycerolysis of triglycerides with glycerol. The diglyceride portion w/w is at least about 65% to about 80%, and most preferably from about 70% to about 80%. The high diglyceride emulsifier is useful in preparing a margarine from a selected quantity a non-hydrogenated vegetable oil and from an amount of saturated fat for use in puff pastry products. The puff pastry is trans fat free and a less than usual percentage of saturated fats. A preferred structured puffpastry margarine is prepared by mixing on a weight to weight basis about 14 parts of the high diglyceride emulsifier that is in predominantly stable beta crystal form, from about 14 to 27 parts of a non-hydrogenated vegetable oil, and from about 40 to about 52 parts of a saturated fat.

The invention discloses a method for producing diglyceride with rice bran oil of high acid value. The method adopts rice bran oil of high acid value as the substrate material and glycerin as the acyl acceptor, and employs lipase for the glycerolysis of rice bran oil of high acid value through enzymatic reaction and the synthesis of diglyceride through esterification in a non-solvent system. The method comprises the steps of: (1) subjecting crude rice bran oil of high acid value to a hydrated degumming process so as to obtain degummed rice bran oil of high acid value; (2) adding glycerin into the degummed rice bran oil of high acid value, thus obtaining a mixture of diglyceride; (3) separating the mixture of diglyceride, thus obtaining diglyceride. In the invention, the preparation processis shortened, the unit operation process of separating the solvent from the system is nonexistent, and the energy consumption is saved. The method of the invention makes fully use of the free fatty acid in the system to reduce the acid value of the system, and the loss of nutrient components from the rice bran oil of high acid value under an enzymatic mild reaction condition is reduced.

A mono-, di-, and triglyceride emulsifier composition is provided that is obtained by the interesterification or glycerolysis of triglycerides with glycerol. The diglyceride portion w/w is at least about 65% to about 80%, and most preferably from about 70% to about 80% (HiDi). The high diglyceride emulsifier is useful in preparing a trans free shortening from anon-hydrogenated vegetable oil for use in bakery goods, which then have a significantly lower saturated fat content and a substantially higher polyunsaturated level than heretofore available when a conventional mono- and diglyceride emulsifier is used in the goods. A preferred shortening that is predominantly in stable beta prime crystalline form is prepared by mixing on a weight to weight basis from about 10% to about 30%, and preferably about 15% to 20%, of the HiDi composition, with the remainder being non-hydrogenated soybean oil.

The invention relates to a method for preparing diglyceride through continuous enzymatic glycerolysis, which pertains to the technical field of gease modification. In the invention, glycerin, raw oil material and low-boiling single-phase organic solvent are fully mixed, and then continuous glycerolysis is carried out through a fixed bed reactor filled with immobilized lipase, and the products are distilled for removing the organic solvent to obtain the high-content diglyceride mixture. The invention greatly reduces the viscosity of the reaction system, improves the intersolubility of reaction materials, and protects the enzyme, thus improving the reaction efficiency and prolonging the service life of the enzyme.

The invention discloses a method for extracting squalene from grease. The method comprises the following steps of using glycerin and lipase to perform glycerolysis on the grease; converting most of triglyceride in the grease into monoglyceride and diglyceride; utilizing a cyclodextrin inclusion technique to extract the squalene, so as to avoid the complicated operation of the one-step column chromatography or saponification extraction method, greatly reduce the usage amount of organic solvent, and avoid the defects of high cost and low efficiency in the supercritical extraction and high-efficiency counter-current chromatography. The method has the advantages that the amount of impurities is small, the squalene and residual sterol are adsorbed and separated by an alumina column, and the purpose of further purifying the squalene is realized.

The disclosed apparatus, systems and methods relate to the conversion of high free fatty acid (“HFFA”) containing oils defined as oils containing 20-100% free fatty acids (“FFA”) and low free fatty acid (“LFFA”) containing oils defined as oils containing 1-20% free fatty acids (FFA) into oil with less than about 0.5-1% FFA. If the feedstock is HFFA oil, the process includes a combination of partial glycerolysis of HFFA oils to produce LFFA oils and subsequent stripping of LFFA oils to produce NFFA oils via steam distillation. If the feedstock is LFFA oil, the process includes stripping of LFFA oils to produce NFFA oils via steam distillation and subjecting FFA to partial glycerolysis to convert FFA to oil.

The present invention relates to a process for producing high purity monoglycerides from edible oils/fats and fatty acids through glycerolysis, in particular but not exclusively to the production of monoglycerides from palm oil and palm oil products. This is achieved by providing a process for the production of monoglycerides of fatty acids or fats and oils, comprising the steps of reacting fatty acids or fats and oils with excess glycerol in the presence of an acidic or alkaline catalyst; substantially separating the crude reaction product from the other reaction components; removing unwanted reaction components from the crude reaction product by washing; drying the reaction product.

The invention discloses a preparation method for the epoxidized plant oil, which is characterized by comprising the following steps: (1) subjecting the plant oil and hydrogen peroxide to epoxidation reaction with partial glyceride lipase as a catalyst and glycerol as a reaction promoter; (2) separating reaction products to recover the oil phase and obtain the epoxidized plant oil. The above process is free of any side reaction, such as hydrolysis, glycerolysis and the like. Meanwhile, the product of the method is single and the production process is easy to control. The catalyst can be recycled. Therefore, the method is good in industrial application prospect.

A mono-, di-, and triglyceride stabilizer is provided that is especially adapted for stabilizing nut butters such as peanut butter to prevent separation of the oil portion of the butter from the solids portion while retaining the glossy appearance of the product. The stabilizer is obtained by interesterification or glycerolysis of triglycerides with glycerol. The diglyceride portion w/w of the stabilizer is greater than 60%, and most preferably about 65%. Preferably about 1% to about 4% w/w of the stabilizer is added to the nut butter.

The invention discloses a method for preparing glyceride rich in fish oil and n-3 long-chain polyunsaturated fatty acid by virtue of an enzyme method and a product of the method. The method comprisesthe following steps: carrying out enzymatic alcoholysis reaction, so as to obtain an intermediate enzymolysis product rich in n-3 long-chain polyunsaturated fatty acid; adding the intermediate enzymolysis product and glycerin into an intermittent reactor in a molar ratio of 1 to (3-6), adding 3wt%-12wt% of lipase, and carrying out reaction at a temperature of 30-70 DEG C and a stirring velocity of300rpm-800rpm for 6-12 hours, so as to obtain a monoglyceride product; and adding the intermediate enzymolysis product and the glycerin into the intermittent reactor in a molar ratio of 1 to (0.5-2),adding 4wt%-14wt% of lipase, and carrying out reaction at a temperature of 30-70 DEG C and a stirring velocity of 300rpm-800rpm for 6-12 hours, so as to obtain a diglyceride product. The monoglyceride product or diglyceride product rich in n-3 long-chain polyunsaturated fatty acid is prepared through combination of enzymic-method alcoholysis enrichment and enzymic-method glycerolysis, the processoperation is simple, and the content of n-3 long-chain polyunsaturated fatty acid in the obtained diglyceride product or monoglyceride product is high.

This invention provides monoglycerides containing a conjugated fatty acid, and a process for producing the above described conjugated fatty acid containing monoglycerides in which all kinds of lipases can be used as catalysts.

This invention relate to monoglycerides containing a conjugated fatty acid (preferably in an amount of 50% or more of fatty acids).

This invention also relates to a process for producing the conjugated fatty acid containing monoglycerides, in which the conjugated fatty acid containing a free fatty acid and glycerol are subjected to the reaction of esterification, or of esterification and glycerolysis in the presence of lipase as a catalyst.

The invention discloses a method for preparing diglyceride by enzymatically catalyzing glycerol by a supercritical CO2 system. Diglyceride (Diglyceride, DAG) is a natural ingredient of oil, has the content of about 5 percent, is an ingredient with stronger function in natrual oil and can be divided into two kinds of 1, 2-DAG and 1, 3-DAG according to different combination positions of acyl and glycerol hyroxyl, wherein the active function of the 1, 3-DAG is better. In recent years, by taking the natural oil as a raw material, the method for preparing the DAG comprises a glycerolysis method, a hydrolysis method, a hydrolysis-esterification combined method and the like. At present, the glycerolysis method is mainly adopted, but has low reaction yield and has little 1, 3-DAG content. In a supercritical state, a CO2 fluid simultaneously plays the roles of a solvent and a catalyst and can efficiently avoid the phenomena of catalyst positioning, inactivation and the like. In addition, moreimportantly, the CO2 fluid can prevent glycerolysis reverse reaction in the reaction environment. The diglyceride content in a product generated through the method is 70.2 percent, wherein the content of the 1, 3-DAG can reach 48.8 percent.

A method for producing diesel grade fuel of plant origin by transesterifying a refined vegetable oil with a charge of a C1-C4 alcohol in the presence of a catalyst and at least 0.2 parts by volume, related to unit volume of refined vegetable oil, of an aliphatic hydrocarbon solvent with a boiling point of -42 DEG C to 200 DEG C, comprises mixing the oil, alcohol, catalyst and solvent in a single reaction vessel under homogeneous conditions which promote transesterif ication to 95-98% completion and which suppress reverse glycerolysis, without stopping transesterif ication to remove by- product polar glycerol, and without subjecting the oil/fuel mixture to a further transesterif ication step with a fresh charge of alcohol and catalyst.

The invention provides a cocoa butter substitute prepared by camellia oil glycerolysis. The cocoa butter substitute includes 88-92% by mass of diacylglycerol. The invention also provides a method for preparation of the cocoa butter substitute by camellia oil glycerolysis. The method includes the steps of: mixing camellia oil having a triglyceride mass content of greater than 95% with glycerin; adding 1, 3 position specific enzyme into the obtained mixture to carry out glycerolysis reaction; then distilling the reactants to remove glycerin, fatty acid, monoglyceride and triglyceride so as to obtain crude camellia oil diacylglycerol; and then subjecting the obtained crude camellia oil diacylglycerol to fractionation to separate a solid phase. The camellia oil diacylglycerol cocoa butter substitute provided by the invention has very similar properties to natural cocoa butter, and has the same taste.

The invention relates to a method for preparing diglyceride through industrial molecular distillation and reducing 3-chloropropanol ester in diglyceride. The method comprises the following main steps: subjecting palm oil, cottonseed oil or vegetable fat to enzymatic glycerolysis so as to obtain diglyceride-rich mixed lipid which is used as a raw material, continuously conveying the raw material to a deaerator via a feed pump and removing air carried by the raw material; heating the degassed raw material to 135 to 160 DEG C, allowing the heated raw material to enter a film evaporator, adjusting the rotating speed of the film evaporator to 150 to 180 r/min and absolute pressure to be 1 mbar or so, and separating out lower-boiling-point components in the raw material; and adjusting the temperature of a heating medium to 230 to 280 DEG C, heating the raw material to 180 to 215 DEG C, uniformly pumping the raw material into a scraped-film type short-path distiller, adjusting the rotating speed of the scraped-film type short-path distiller to 220 to 300 r/min and absolute pressure to be 0.001 to 0.1 mbar or so, and collecting separated light-phase and heavy phase components. In industrial molecular distillation for preparation of a diglyceride product, the flow of the raw material is controlled to be 15 to 25 L/h; and the obtained diglyceride product with purity of 80% or more has to undergo molecular distillation twice.