Preparation method of human milk fat substitute

A human milk fat substitute and oil technology, applied in food preparation, edible oil/fat, food science, etc., can solve the problems of large amount of fatty acid, high price of tripalmitin, and difficulty in downstream deacidification of increased cost

Active Publication Date: 2013-01-02
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 proc

Method used

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  • Preparation method of human milk fat substitute
  • Preparation method of human milk fat substitute
  • Preparation method of human milk fat substitute

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take by weighing 20g high-melting-point palm stearin in the round-bottomed flask, and mix with the free fatty acid that comes from rapeseed oil with the ratio of 1: 10 in molar ratio, add the Lipozyme RM IM of 10wt% in the mixed system (in total substrate weight), and reacted for 4 hours in water at 60° C. and a stirring rate of 250 rpm. After the obtained reaction substrate was centrifuged at 4000rpm to remove the enzyme, the fatty acid was removed by molecular distillation. The molecular distillation conditions were: evaporation temperature, 185°C; heat exchanger temperature, 60°C; rotational speed, 120rpm; absolute pressure, 2Pa. The composition and distribution of fatty acids are shown in the table.

[0027] Fatty acid composition and distribution of table 2 intermediate product

[0028] fatty acid

total

sn-2

%sn-2 a

sn-1,3 b

C12:0

0.3

0.1

11.1

0.4

C14:0

0.4

0.1

8.3

0.6 ...

Embodiment 2

[0058] Take by weighing 20g high-melting-point palm stearin in the round-bottomed flask, and mix with the free fatty acid that comes from rapeseed oil with the ratio of 1: 12 in molar ratio, add the Lipozyme RM IM of 8wt% in the mixing system (in total substrate weight), and reacted for 3 hours in water at 65° C. and a stirring rate of 250 rpm. After the obtained reaction substrate was centrifuged at 4000rpm to remove the enzyme, the fatty acid was removed by molecular distillation. The molecular distillation conditions were: evaporation temperature, 185°C; heat exchanger temperature, 60°C; rotational speed, 120rpm; absolute pressure, 2Pa. The composition and distribution of fatty acids are shown in the table below.

[0059] Fatty acid composition and distribution of table 4 intermediate product

[0060] fatty acid

total

sn-2

%sn-2

sn-1,3

C12:0

0.3

0.1

11.1

0.4

C14:0

0.4

0.1

8.3

0.6

...

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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 ...

Claims

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Application Information

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IPC IPC(8): A23D9/00A23L1/29A23L33/00
Inventor 王兴国邹孝强黄健花金青哲刘元法宋志华刘睿杰常明
Owner JIANGNAN UNIV
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