Electrodialysis process for preparing food-grade xylo-oligosaccharide from viscose fiber squeezed alkali liquor

An electrodialysis process and a technology of squeezing lye, which is applied in the field of electrodialysis process, can solve the problems of being unsuitable for large-scale industrial production, low concentration temperature of nanofiltration membrane, and low membrane filtration efficiency, and achieve low cost, high semi-fiber, The effect of low alkali concentration

Inactive Publication Date: 2015-02-18
YIBIN YATAI BIOTECH
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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

[0046] The electrodialysis process for preparing food-grade xylo-oligosaccharides using viscose fiber pressed lye as raw material, the specific process steps are as follows:

[0047] A. Membrane concentration

[0048] The squeezed liquid produced by viscose fiber is pre-filtered to remove large particles of impurities, the permeate is concentrated twice through the nanofiltration membrane cycle, and the last concentrated liquid is sent to the electrodialysis membrane stack to recover the lye in the anode chamber, which is Concentrate of squeezed liquid; the nanofiltration membrane is concentrated twice in circulation, and before each filtration, the feed liquid enters the nanofiltration membrane after being diluted with water;

[0049] B. Extract semi-fiber

[0050] Add acid to neutralize the concentrated solution of the squeezed lye to obtain a semi-fiber liquid.

[0051] C. Enzymolysis

[0052] Add complex enzymes to the semi-fiber liquid, enzymatic hydrolysis reaction oc...

Embodiment 2

[0056] The electrodialysis process for preparing food-grade xylo-oligosaccharides using viscose fiber pressed lye as raw material, the specific process steps are as follows:

[0057] A. Membrane concentration

[0058] The squeezed liquid produced by viscose fiber is pre-filtered to remove large particles of impurities, the permeate is concentrated 3 times through the nanofiltration membrane cycle, and the last concentrated liquid is sent to the electrodialysis membrane stack to recover the lye in the anode chamber, which is Concentrate of squeezed 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;

[0059] B. Extract semi-fiber

[0060] Add acid to neutralize the concentrated solution of the squeezed lye to obtain a semi-fiber liquid.

[0061] C. Enzymolysis

[0062] Add complex enzymes to the semi-fiber liquid, enzymatic hydrolysis reactio...

Embodiment 3

[0066] The electrodialysis process for preparing food-grade xylo-oligosaccharides using viscose fiber pressed lye as raw material, the specific process steps are as follows:

[0067] A. Membrane concentration

[0068] The squeezed liquid produced by viscose fiber is pre-filtered to remove large particles of impurities, the permeate is concentrated 4 times through the nanofiltration membrane cycle, and the last concentrated liquid is sent to the electrodialysis membrane stack to recover the lye in the anode chamber, which is Concentrate of squeezed liquid; the nanofiltration membrane is concentrated 4 times in circulation, and before each filtration, the feed liquid enters the nanofiltration membrane after being diluted with water;

[0069] B. Extract semi-fiber

[0070] Add acid to neutralize the concentrated solution of the squeezed lye to obtain a semi-fiber liquid.

[0071] C. Enzymolysis

[0072] Add complex enzymes to the semi-fiber liquid, enzymatic hydrolysis reactio...

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Abstract

The invention provides an electrodialysis process for preparing food-grade xylo-oligosaccharide from viscose fiber squeezed alkali liquor. 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, feeding the finally-concentrated concentrate to an electrodialysis membrane reactor, and recovering alkali liquor, namely a concentrate of the squeezed liquor, from an anode chamber, 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 an electrodialysis process for preparing food-grade xylo-oligosaccharide by using viscose fiber pressed lye as a raw material. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C07H3/06C07H3/04C07H1/06C08B37/14
Inventor 邓传东冯涛孙毅唐孝兵莫世清周林罗红梅
Owner YIBIN YATAI BIOTECH
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