Preparation method of high-purity diglyceride

Abstract

The invention discloses a preparation method of high-purity diglyceride, which comprises the following steps: 1) under the catalytic action of partial glyceride lipase, reacting a fatty acid donor and glycerol to synthesize a mixture containing diglyceride and monoglyceride, performing centrifugal separation on the mixture, and recovering the supernatant oil phase; 2) under the catalytic action of monoglyceride lipase, reacting the monoglyceride in the oil phase obtained in the step 1) and a hydroxyl donor, thus converting to obtain non-glyceride; 3) separating the non-glyceride component in the mixture obtained in the step 2) from the diglyceride, thus obtaining the high-purity diglyceride. According to the invention, the monoglyceride in the mixture is selectively removed through an enzyme method, the separation process is simplified, the energy consumption of the separation process is reduced, and the problem on the separation of MAG in the mixture is well solved. Meanwhile, the diglyceride content in the prepared product is up to 98% or above.

Description

technical field

[0001] The invention relates to a preparation method of high-purity diglyceride. Background technique

[0002] Diacylglycerol (DAG for short) is a product obtained by esterifying glycerol (glycerol) with two fatty acids. It is a natural component of oil and an intermediate product of oil metabolism. Diacylglycerol functional edible oil is a new type of oil modified by enzymatic or chemical methods from natural edible oil. It has clear functions of preventing obesity and lowering blood fat, and is safe to eat. It is a replacement product for ordinary edible oil. , can fundamentally alleviate the current situation of obesity, hyperlipidemia, diabetes and other chronic diseases caused by high-fat and high-calorie diet structure, and adjust the sub-health level of the human body and curb it without changing the existing eating habits. The occurrence and development of related chronic diseases. The relative content of DAG in natural oils mainly depends on the so...

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