Direct membrane separating process of producing inulin and oligofructose

Abstract

The present invention relates to a method for producing alantin or oligofructose by direct membrane separation by using Jerusalem artichoke or chicory as raw material, which is characterized in: firstly making Jerusalem artichoke or chicory washed, smashed or sliced, extracting Jerusalem artichoke juice or chicory juice; then refining and extracting pure Jerusalem artichloke juice or pure chicory juice; finally using ultrafiltering membrane to perform pure Jerusalem artichoke juice or pure chicory juice membrane separation, the pepentrated liquid is ologofructose solution, and the trapped liquid is liquid is alantin solution. The pore diameter of the ultrafiltering membrane is determined according to the degree of polymerization of oligofructose or alantin to be needed.

Description

technical field [0001] The present invention relates to the production method of inulin and fructo-oligosaccharide, especially an industrialized method for synchronously producing high-purity fructo-oligosaccharide and high-purity, high-polymerization degree inulin without any chemical or biological reaction using Jerusalem artichoke or chicory as raw materials . Background technique [0002] Fructo-oligosaccharide is a mixture, and the fructo-oligosaccharide mentioned in the present invention is a mixture of fructan and sucrose fructan with a degree of polymerization of 2---9 (the minimum degree of polymerization of sucrose fructan is 3), and the content is greater than 95%. Fructose-oligosaccharide is a proliferation factor of bifidobacteria and a low-energy sweetener. Fructose-oligosaccharide is also a kind of water-soluble dietary fiber, which can reduce serum cholesterol and triglyceride levels. After intake of fructo-oligosaccharide, it will not cause Fluctuations in...

AI Technical Summary

Problems solved by technology

Some units in China are studying the production of fructo-oligosaccharides from Jerusalem artichoke, such as the Tianjin Institute of Microbiology, but because the dry basis content of fructo-oligosaccharides in the enzymatic hydrolysis product is only 55%, the content of monosaccharides and sucrose is too high, and separation is difficult. It is not yet possible to produce products with a fructooligosaccharide content greater than 95%

[0007] Problems existing in this technology: the two kinds of production techniques have the same disadvantages, the enzymes used in the production can only be produced in a small number of units, the cost is high, the reaction conditions are harsh, the enzymes used are all mixtures, and the enzymatic hydrolysis products are difficult to control. High content of monosaccharide and sucrose, difficult to separate and purify

[0009] Problems with this technology: Chicory, a raw material suitable for extracting inulin, is only grown in a few countries in Europe, and China has no source of raw material

Extracting inulin from chicory with water extraction requires pre-treatment of chicory, such as sliced ​​or shredded. In order to improve the extraction rate, a large amount of water needs to be boiled for a long time. The production cycle is long, the concentration of the extract is low, and the investment in equipment is large. , large heat consumption

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