Preparation method of grease rich in OPL and OPO and product thereof

Abstract

The invention discloses a preparation method of grease rich in OPL and OPO, wherein the preparation method comprises the following steps: (1) preparing OPO or LPL: mixing a PPP raw material and oleic acid / linoleic acid according to the ratio of PPP to oleic acid / linoleic acid of 1:3-1:5, adding lipase and a solvent, stirring or continuously flowing at a certain temperature for a certain time to carry out enzymatic transesterification, and purifying to remove fatty acid to obtain the grease rich in OPO / LPL; and (2) preparing grease rich in OPO and OPL: mixing the grease rich in OPO / LPL with linoleic acid / oleic acid according to a certain proportion, adding lipase and a solvent, stirring or continuously flowing at a certain temperature to carry out enzymatic transesterification, and purifying to remove fatty acid to obtain the grease rich in OPO and OPL. Cheap and easily available glycerol, palmitic acid, oleic acid and linoleic acid are used as raw materials, the intermediate product OPO / LPL is prepared, the grease rich in OPO and OPL can be obtained at the same time, and the method has the advantages that components of the synthetic product are relatively simple, and the content of the target product is controllable.

Description

technical field [0001] The invention relates to a preparation method of oil rich in OPL and OPO and a product thereof, belonging to the field of preparation of structural esters and food additives. Background technique [0002] 1,3-Dioleic acid-2-palmitic acid triglyceride (OPO) is mainly used as a nutritional supplement in infant formula. For infants and young children, breast milk is the most ideal food source during growth and development. However, when breastfeeding is not possible due to some special reasons, infant formula milk powder is an ideal choice. Milk fat is an important component of breast milk. Although it only accounts for about 3-5% of breast milk, it provides 50% to 60% of the energy for infants and young children, and is the main source of energy for infant growth. More than 98% of breast milk fat is triglyceride, 70% of palmitic acid in breast milk is located at the sn-2 position of triglyceride, and the glyceride with palmitic acid located at the sn-2...

AI Technical Summary

Problems solved by technology

At present, there are a large number of methods for the preparation of 1,3-dioleic acid-2-palmitic acid triglyceride (OPO), but the preparation is rich in both OPO and 1-oleic acid-2-palmitic acid-3-linoleic acid triglyceride There are also few reports on breastmilk fat substitutes of ester (OPL) two structural esters. Patent applications for invention CN 109468349A and CN109566769A disclose a method for preparing OPL and OPO / OPL oil composition rich in high purity Tripalmitin is used as the raw material, which cannot be obtained directly and requires multi-step preparation and purification; the "one-pot method" is generally used, that is, tripalmitin (PPP) and oleic acid, linoleic acid and other raw materials are simultaneously Adding together to react, it is easy to produce LPL (1,3-dilinoleic acid-2-palmitic acid triglyceride), OOO, LLL, LOL, OLO, PPO, PPL and other by-products with different structures; it is impossible to accurately prepare rich It is difficult to obtain a higher content of OPL and OPO oils from oils containing two active structural esters of OPO and OPL, let alone control the ratio of OPO / OPL

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