Preparation method of human milk fat substitute

Abstract

The invention relates to a preparation method of a human milk fat substitute. The method comprises the steps of: step 1) conducting an acid hydrolysis reaction on a raw material of high melting palm stearin subjected to chemical interesterification and alcohol leaching, and an acyl donor of rapeseed oil fatty acid by using Lipozyme RM IM as a catalyst, so as to reduce the total palmitic acid content and increase the relative content of site-two palmitic acid of the raw material; and step 2) deacidifying an intermediate product; and at the same time, calculating the amount of sunflower seed oil, rapeseed oil, palm kernel oil, algae oil and microbial oil added to the intermediate product according to the composition and distribution of fatty acids in human milk fat, by a grease adding model, so as to ensure composition and distribution of fatty acids in a final product meeting requirements of a human milk fat substitute, as well as realize a maximum addition amount. The invention adopts two steps to produce the human milk fat substitute, in order to reduce usage amount of free fatty acids in the acid hydrolysis reaction; meanwhile, two times of oil additions increase yield. Therefore, the invention greatly reduces the cost, and achieves a more than doubled yield compared with a similar products with a similar cost.

Description

technical field [0001] The invention relates to a method for preparing a human milk fat substitute, in particular to a method for preparing a human milk fat substitute from palm stearin. Background technique [0002] The fat content of human milk is about 3-5%, which provides energy for infants, essential nutrients such as essential fatty acids, polyunsaturated fatty acids and fat-soluble vitamins. The triglyceride content in human milk fat is about 98%, and its composition will change with changes in diet, lactation period, race, etc. Through the analysis of the chemical composition of milk fat in different stages of lactation, there are certain rules in the composition and distribution of fatty acids. In human milk, the main fatty acids are oleic acid (25-30%), palmitic acid (20-30%), linoleic acid (10-20%), stearic acid (5-9%), myristic acid ( 4-9%) and lauric acid (3-7%), the ratio of linoleic acid to linolenic acid is between 5-15, of which 60-70% of palmitic acid is ...

AI Technical Summary

Problems solved by technology

Most of the current processes use one-step acid hydrolysis of tripalmitin to produce human milk fat substitutes. The amount of fatty acid used in the process is large, which increases the cost and the difficulty of downstream deacidification. At the same time, tripalmitin is expensive and difficult to obtain

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