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Method for preparing food-grade xylo-oligosaccharide through viscose squeezed alkali liquid

A technology of viscose fiber and pressing lye, which is applied in the field of xylo-oligosaccharide preparation, can solve the problems of high production cost and low yield of xylo-oligosaccharide, and achieve the effects of reducing production waste, low salt content, and eliminating the purification process

Inactive Publication Date: 2016-03-23
YIBIN YATAI BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent also has the problems of high production cost and low xylooligosaccharide yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for preparing food-grade xylo-oligosaccharides by pressing lye from viscose fibers, the specific operations are as follows:

[0042] A. Membrane concentration

[0043] The squeeze liquid produced by viscose fiber is filtered through a membrane, and the concentrated liquid is neutralized with hydrochloric acid to obtain a xylan solution;

[0044] B. Enzyme hydrolysis

[0045] Enzymolysis reaction between xylan solution and compound enzyme to obtain enzymolysis liquid and enzymolysis residue, the enzymolysis residue is diluted with water, preheated and then centrifuged, the supernatant is xylan solution, and mixed with the compound enzyme Under the action, the secondary enzymatic hydrolysis solution is obtained;

[0046] C. Purification

[0047] Combine the enzymolyzed liquids obtained in step B, enter the nanofiltration membrane for desalination, decolorize the obtained concentrated liquid with activated carbon, and obtain a purified liquid of xylooligosaccha...

Embodiment 2

[0049] This embodiment is basically the same as Embodiment 1, on this basis:

[0050] The enzymatic hydrolysis reaction in step B is carried out in a ceramic membrane reactor.

Embodiment 3

[0052] This embodiment is basically the same as Embodiment 1, on this basis:

[0053] The enzymatic hydrolysis reaction in step B is carried out in a ceramic membrane reactor.

[0054] The molecular weight cut off of the ceramic membrane is 800.

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Abstract

The invention discloses a method for preparing a food-grade xylo-oligosaccharide through viscose squeezed liquid. The method is characterized by comprising the following specific operation steps: A, filtering squeezed liquid from viscose production through a membrane, taking a concentrated solution and adding hydrochloric acid into the concentrated solution for neutralizing so as to obtain a xylan solution; B, carrying out enzymatic hydrolysis on the xylan solution and compound enzymes so as to obtain an enzymatic hydrolysate and residues of enzymatic hydrolysis, adding water for diluting residues of enzymatic hydrolysis, preheating and carrying out centrifugal separation, taking supernatant namely the xylan solution and obtaining a secondary enzymatic hydrolysate under the effects of compound enzymes; C, mixing the enzymatic hydrolysates obtained in the step B, enabling the mixed solution to enter a nanofiltration membrane for desalting, carrying out activated carbon decoloration on the obtained concentrated solution, carrying out resin ion exchange so as to obtain purification liquid of xylo-oligosaccharide, evaporating and drying so as to obtain the food-grade xylo-oligosaccharide. The utilization ratio of xylan is high, production waste is reduced and the production cost is reduced.

Description

technical field [0001] The invention relates to the field of xylo-oligosaccharide preparation, in particular to a method for preparing food-grade xylo-oligosaccharide by pressing lye from viscose fiber. Background technique [0002] Xylo-oligosaccharides are produced from xylan-rich plants through biochemical methods. At present, the production of xylo-oligosaccharides mostly uses corncobs as raw materials, and the production process is complicated and the cost is high. In the production process of viscose fiber made of chemical pulp (wood pulp, cotton pulp, straw pulp, reed pulp, etc.) first step. The high concentration of hemicellulose has an extremely adverse effect on the production process of viscose fiber and the quality of the finished product. Therefore, it is necessary to dissolve the hemicellulose with lye in the dipping process to obtain high-strength cellulose. Therefore, in the above process, it will A large amount of highly concentrated alkaline press liquor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C12P19/04
CPCC12P19/14C12P19/04
Inventor 邓传东唐孝兵莫世清周林罗红梅程德华
Owner YIBIN YATAI BIOTECH
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