Membrane condensation technology for preparing feed-grade xylo-oligosaccharide from viscose fiber squeezed liquid

A technology of viscose fiber and xylo-oligosaccharides, which is applied in the field of xylo-oligosaccharides preparation, can solve the problems of being unsuitable for large-scale industrial production, low membrane filtration efficiency, and low concentration temperature of nanofiltration membranes, and achieves low cost and guaranteed Filtration efficiency and process operation efficiency are high

Inactive Publication Date: 2015-03-11
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

[0045] The membrane concentration process for producing food-grade xylo-oligosaccharides using viscose fiber squeeze liquid as raw material, the specific process steps are as follows:

[0046] A. Membrane concentration

[0047] The pressed lye produced by viscose fiber is pre-filtered to remove large particles of impurities, and then enters the microfiltration membrane for treatment. The permeate is concentrated twice through the nanofiltration membrane cycle, and the last concentrated solution is diluted with water and then sent to the ceramic membrane for filtration. , the obtained concentrated solution is the concentrated solution of squeezed lye; the nanofiltration membrane is concentrated twice in circulation, and before each filtration, the feed liquid enters the nanofiltration membrane after being diluted with water.

[0048] B. Extract semi-fiber

[0049] Add acid to neutralize the concentrated solution of the squeezed lye to obtain a semi-fiber liquid.

[0050] C. E...

Embodiment 2

[0055] The membrane concentration process for producing food-grade xylo-oligosaccharides using viscose fiber squeeze liquid as raw material, the specific process steps are as follows:

[0056] A. Membrane concentration

[0057] The pressed lye produced by viscose fiber is pre-filtered to remove large particles of impurities, and then enters the microfiltration membrane for treatment. The permeate is concentrated 3 times through the nanofiltration membrane cycle, and the last concentrated solution is diluted with water and then sent to ceramic membrane for filtration. , the resulting concentrated solution is the concentrated solution of the squeezed lye; 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.

[0058] B. Extract semi-fiber

[0059] Add acid to neutralize the concentrated solution of the squeezed lye to obtain a semi-fiber liquid.

[0060]...

Embodiment 3

[0065] The membrane concentration process for producing food-grade xylo-oligosaccharides using viscose fiber squeeze liquid as raw material, the specific process steps are as follows:

[0066] A. Membrane concentration

[0067] The pressed lye produced by viscose fiber is pre-filtered to remove large particles of impurities, and then enters the microfiltration membrane for treatment. The permeate is concentrated 4 times through the nanofiltration membrane cycle, and the last concentrated solution is diluted with water and then sent to the ceramic membrane for filtration. , the resulting concentrated solution is the concentrated solution of the squeezed lye; 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.

[0068] B. Extract semi-fiber

[0069] Add acid to neutralize the concentrated solution of the squeezed lye to obtain a semi-fiber liquid.

[0...

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Abstract

The invention provides a membrane condensation technology for preparing feed-grade xylo-oligosaccharide from viscose fiber squeezed liquid. The technology comprises the following steps: step A, membrane condensation: pre-filtering the squeezed liquid, which is generated in the viscose fiber production process, to remove the large particle impurities, then processing the squeezed liquid by a micro-filter membrane, cyclically condensing the filtrate by a nano-filter membrane for 2 to 4 times, diluting the final condensate by water, then filtering with a ceramic membrane so as to obtain condensate of squeezed alkali solution, wherein in the cyclic condensation process through a nano-filter membrane, before filtration, the fluid should be diluted by water in advance; step B, semi-fiber extraction: adding acid into the obtained condensate of squeezed alkali solution to neutralize the condensate so as to obtain a semi-fiber solution; step C, enzymatic hydrolysis: adding composite enzymes into the obtained semi-fiber solution to carry out enzymatic hydrolysis reactions so as to obtain enzymatic hydrolysate; step D, purification: filtering the enzymatic hydrolysate by a ceramic membrane, filtering the filtrate by a nano-filter membrane to remove the salts so as to obtain the condensate namely the purified solution of xylo-oligosaccharide, and finally evaporating and drying the condensate so as to obtain the feed-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 producing feed-grade xylo-oligosaccharide by using viscose fiber squeeze liquid 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 sw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C12P19/12C12P19/04C12P19/00B01D61/58
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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