Method for preparing feed-grade xylooligosaccharide from waste liquid generated in a production process of viscose staple fibers

A viscose staple fiber and production process technology, which is applied in the field of xylooligosaccharide preparation, can solve the problems of hemicellulose discharge and other problems, and achieve the effects of saving resources, reducing costs, and reducing production and treatment costs

Pending Publication Date: 2017-02-01
唐山三友集团兴达化纤有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing xylooligosaccharides, especially a method for preparing feed grade xylooligosaccharides using waste liquid produced in the production process of viscose staple fiber. Hemicellulose is used as raw material to process feed-grade xylooligosacc

Method used

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Embodiment 1

[0033] A method for preparing feed-grade xylooligosaccharides by utilizing waste liquid produced in the viscose staple fiber production process, comprising the following steps:

[0034] (1) Extraction of hemicellulose: take the waste liquid in the viscose production process (pressing process) as raw material, wherein the concentration of sodium hydroxide is 180 grams per liter, and the hemicellulose content is 30 grams per liter. The hemicellulose waste liquid is pretreated by plate frame and micropore, and then separated by nanofiltration membrane to obtain hemicellulose concentrated liquid 1 and net liquid 1; wherein, the filtration accuracy of the plate frame is 20 μ, and the filtration accuracy of the micropore is 5 μ, the nanofiltration membrane is an 8040 type alkali-resistant membrane filter element, and the filtration accuracy is 500 molecular weight; the sodium hydroxide content in the hemicellulose concentrate 1 is 180 grams per liter, and the hemicellulose content is...

Embodiment 2

[0042] A method for preparing feed-grade xylooligosaccharides by utilizing waste liquid produced in the viscose staple fiber production process, comprising the following steps:

[0043] (1) Extraction of hemicellulose: take the waste liquid in the viscose production process (pressing process) as raw material, wherein the concentration of sodium hydroxide is 280 grams per liter, and the hemicellulose content is 60 grams per liter. The hemicellulose waste liquid is pretreated by plate frame and micropore, and then separated by nanofiltration membrane to obtain hemicellulose concentrated liquid 1 and net liquid 1; wherein, the filtration accuracy of the plate frame is 20 μ, and the filtration accuracy of the micropore is 5 μ, the nanofiltration membrane is an 8040 type alkali-resistant membrane filter element, and the filtration accuracy is 200 molecular weight; the sodium hydroxide content in the hemicellulose concentrate 1 is 280 g / L, and the hemicellulose content is 70 g / L Lif...

Embodiment 3

[0051] A method for preparing feed-grade xylooligosaccharides by utilizing waste liquid produced in the viscose staple fiber production process, comprising the following steps:

[0052] (1) Extraction of hemicellulose: take the waste liquid in the viscose production process (pressing process) as raw material, wherein the concentration of sodium hydroxide is 220 grams per liter, and the hemicellulose content is 40 grams per liter. The hemicellulose waste liquid is pretreated by plate frame and micropore, and then separated by nanofiltration membrane to obtain hemicellulose concentrated liquid 1 and net liquid 1; wherein, the filtration accuracy of the plate frame is 20 μ, and the filtration accuracy of the micropore is 5 μ, the nanofiltration membrane is an 8040 type alkali-resistant membrane filter element, and the filtration accuracy is 300 molecular weight; the sodium hydroxide content in the hemicellulose concentrate 1 is 220 grams per liter, and the hemicellulose content is...

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PUM

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Abstract

The invention relates to a method for preparing feed-grade xylooligosaccharide from waste liquid generated in production process of viscose staple fibers. The method comprises the following steps: extracting hemicellulose, recovering alkali of a concentrated hemicellulose solution, concentrating the hemicellulose, hydrolyzing, neutralizing and enzymatically hydrolyzing the hemicellulose, and concentrating syrup, so that the finished feed-grade xylooligosaccharide product is obtained. According to the method provided by the invention, by preparing the feed-grade xylooligosaccharide from the hemicellulose in the viscose-producing waste liquid, so that the problem that social environment pollution is caused by the emission of a great amount of hemicellulose-containing waste liquid which is generated in the viscose production and is not effectively treated can be solved, and meanwhile, a new way for a xylooligosaccharide raw material source can be offered by taking the hemicellulose in the waste liquid as a raw material for producing the xylooligosaccharide.

Description

technical field [0001] The invention relates to a method for preparing xylooligosaccharides, in particular to a method for preparing feed grade xylooligosaccharides by using waste liquid produced in the production process of viscose staple fiber. Background technique [0002] Xylooligosaccharide is a functional polymeric sugar composed of 2-7 xylose molecules combined with β-1,4 glycosidic bonds. Compared with soybean oligosaccharides, fructooligosaccharides, and isomaltooligosaccharides, which are commonly used by people, it has unique advantages. It can selectively promote the proliferation of intestinal bifidobacteria, and its bifidus factor function is that of other polymeric sugars. Class 10-20 times. At present, the raw materials for processing xylooligosaccharides in domestic enterprises mainly come from crops such as corncobs and wheat bran. [0003] The quantitative use of xylooligosaccharides as feed additives began in the early 1990s, mainly in Europe, America, ...

Claims

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Application Information

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IPC IPC(8): C12P19/04C12P19/12C12P19/14C07H1/00C07H3/06
CPCC12P19/14C07H1/00C07H3/06C12P19/04C12P19/12
Inventor 陈学江于捍江么志高郑东义郑金生周殿朋王永善庞艳丽韦吉伦王大明王啸臣王庆动张焕良
Owner 唐山三友集团兴达化纤有限公司
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