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Process for producing food-grade xylo-oligosaccharide from viscose fiber squeezed alkali liquor

A technology for squeezing lye and viscose fiber, which is applied in the direction of oligosaccharides, disaccharides, sugar derivatives, etc., can solve the problems of being unsuitable for large-scale industrial production, low membrane filtration efficiency, and low concentration temperature of nanofiltration membranes. Achieve low cost, ensure filtration efficiency, and high process operation efficiency

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] The process of producing food-grade xylo-oligosaccharides using viscose fiber pressed lye as raw material, the specific process steps are as follows:

[0050] A. Membrane concentration

[0051] The pressed lye produced by viscose fiber is pre-filtered to remove large particles of impurities, and then enters the ultrafiltration 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. Filtration, the obtained concentrated solution is the concentrated solution of squeezed lye; the nanofiltration membrane is concentrated twice, and before each filtration, the feed solution is diluted with water and then enters the nanofiltration membrane.

[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 t...

Embodiment 2

[0059] The process of producing food-grade xylo-oligosaccharides using viscose fiber pressed lye as raw material, the specific process steps are as follows:

[0060] A. Membrane concentration

[0061] The pressed lye produced by viscose fiber is pre-filtered to remove large particles of impurities, and then enters the ultrafiltration membrane for treatment. The permeate is concentrated 3 times through the nanofiltration membrane cycle, and the last concentrated solution is diluted with water and sent to the ceramic membrane. Filtration, the obtained concentrated solution is the concentrated solution of the squeezed lye; the nanofiltration membrane is circulated and concentrated for 3 times, and before each filtration, the feed liquid is diluted with water and then enters the nanofiltration membrane.

[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 ...

Embodiment 3

[0069] The process of producing food-grade xylo-oligosaccharides using viscose fiber pressed lye as raw material, the specific process steps are as follows:

[0070] A. Membrane concentration

[0071] The pressed lye produced by viscose fiber is pre-filtered to remove large particles of impurities, and then enters the ultrafiltration membrane for treatment. The permeate is concentrated 4 times through the nanofiltration membrane cycle, and the last concentrated solution is diluted with water and sent to the ceramic membrane. 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 solution is diluted with water and then enters the nanofiltration membrane.

[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 c...

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Abstract

The invention provides a process for producing 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, thinning up the finally-concentrated concentrate with water, and filtrating with a ceramic membrane, so as to obtain a concentrate, namely a concentrate of the 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 preparation of xylo-oligosaccharides, in particular to a process for producing food-grade xylo-oligosaccharides 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 because of t...

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 GRACE GROUP CO LTD
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