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Membrane concentration process for preparing food-grade xylo-oligosaccharide from squeezed liquor for viscose fiber production

A viscose fiber, xylo-oligosaccharide technology, applied in the production of sugar, sugar production, xylose production and other directions, can solve the problem of unsuitability for industrialized large-scale production, low concentration temperature of nanofiltration membrane, low membrane filtration efficiency, etc. problem, to achieve the effect of low cost, high semi-fiber, low alkali concentration

Inactive Publication Date: 2015-02-18
YIBIN GRACE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nanofiltration membrane concentration temperature of this process is low, and the membrane filtration efficiency is low, which is not suitable for industrial large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A membrane concentration process for preparing food-grade xylo-oligosaccharides from viscose fiber production squeeze liquid, the specific process steps are as follows:

[0050] A. Membrane concentration

[0051] The squeezed liquid produced by viscose fiber is pre-filtered to remove large particles of impurities, and the permeate is concentrated twice through the nanofiltration membrane cycle, and the last concentrated liquid is diluted with water and then sent to ceramic membrane for filtration, and the obtained concentrated liquid is squeezed soda The concentrated solution of the liquid; the nanofiltration membrane is concentrated 2 times in circulation, and before each filtration, the feed liquid enters the nanofiltration membrane after being diluted with water;

[0052] B. Extract semi-fiber

[0053] Add acid to neutralize the concentrated solution of the squeezed lye to obtain a semi-fiber liquid.

[0054] C. Enzymolysis

[0055] Add complex enzymes to the semi...

Embodiment 2

[0059] A membrane concentration process for preparing food-grade xylo-oligosaccharides from viscose fiber production squeeze liquid, the specific process steps are as follows:

[0060] A. Membrane concentration

[0061] The squeezed liquid produced by viscose fiber is pre-filtered to remove large particles of impurities, and the permeate is concentrated through the nanofiltration membrane for 3 times, and the last concentrated liquid is diluted with water and then sent to the ceramic membrane for filtration, and the obtained concentrated liquid is squeezed soda The concentrate of the liquid; the nanofiltration membrane is concentrated 3 times in circulation, and before each filtration, the feed liquid enters the nanofiltration membrane after being diluted with water;

[0062] B. Extract semi-fiber

[0063] Add acid to neutralize the concentrated solution of the squeezed lye to obtain a semi-fiber liquid.

[0064] C. Enzymolysis

[0065] Add complex enzymes to the semi-fiber...

Embodiment 3

[0069] A membrane concentration process for preparing food-grade xylo-oligosaccharides from viscose fiber production squeeze liquid, the specific process steps are as follows:

[0070] A. Membrane concentration

[0071] The squeezed liquid produced by viscose fiber is pre-filtered to remove large particles of impurities, and the permeate is concentrated 4 times through the nanofiltration membrane cycle, and the last concentrated liquid is diluted with water and then sent to ceramic membrane for filtration, and the obtained concentrated liquid is squeezed soda The concentrate of the liquid; the nanofiltration membrane is concentrated 2-4 times in circulation, and before each filtration, the feed liquid enters the nanofiltration membrane after being diluted with water;

[0072] B. Extract semi-fiber

[0073] Add acid to neutralize the concentrated solution of the squeezed lye to obtain a semi-fiber liquid.

[0074] C. Enzymolysis

[0075] Add complex enzymes to the semi-fiber...

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Abstract

The invention provides a membrane concentration process for preparing food-grade xylo-oligosaccharide from squeezed liquor for viscose fiber production. The process comprises the following specific process steps: (A) carrying out membrane concentration: firstly pre-filtering squeezed liquor for viscose fiber production, so as to remove large-granule impurities, cyclically concentrating the permeate for 2-4 times with a nano-filtration membrane, thinning up the finally-concentrated concentrate with water, and filtrating with a ceramic membrane, so as to obtain a concentrate, namely a concentrate of squeezed alkali liquor, wherein during the 2-4 times of cyclic concentrating of the nano-filtration membrane, before every filtration, material liquid is thinned up with water and then enters the nano-filtration membrane; (B) extracting hemicellulose: adding acid to neutralize the concentrate of the squeezed alkali liquor, so as to obtain hemicellulose liquid; (C) carrying out enzymolysis: adding a compound enzyme into the hemicellulose liquid, and carrying out enzymolysis reaction, so as to obtain an enzymolysis solution; (D) purifying: filtrating the enzymolysis solution with the ceramic membrane, desalting the permeate with the nano-filtration membrane, enabling the obtained concentrate to be subjected to activated charcoal decoloring and resin ion exchange, so as to obtain a purified solution of xylo-oligosaccharide, evaporating and baking, thereby obtaining the food-grade xylo-oligosaccharide.

Description

technical field [0001] The invention relates to the field of xylo-oligosaccharide preparation, in particular to a membrane concentration process for preparing food-grade xylo-oligosaccharide from viscose fiber production squeeze liquid. Background technique [0002] Xylooligosaccharides, also known as xylooligosaccharides, are a general term for branched chain oligosaccharides formed by combining 2-7 xyloses with β-1,4-glycosidic bonds. The active ingredients are xylobiose, xylotriose, xylotetraose, xylopentose, etc., among which xylobiose and xylotriose are the main ones. Compared with soybean oligosaccharides, fructooligosaccharides, and isomaltose oligosaccharides, which are commonly used by people, xylooligosaccharides have unique advantages. It can selectively promote the proliferation of intestinal bifidobacteria, and its bifidus factor function It is 10-20 times that of other polysaccharides. Xylo-oligosaccharides are considered to be ideal health food sweeteners be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13K13/00
CPCC13K13/002C13K13/007
Inventor 邓传东冯涛孙毅唐孝兵莫世清周林罗红梅
Owner YIBIN GRACE GROUP CO LTD
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