Method for preparing food-grade xylose by utilizing waste liquid generated in production process of viscose staple fibers

A viscose staple fiber and production process technology, which is applied in the field of xylose preparation, can solve the problems of hemicellulose emissions and achieve the effect of solving social and environmental pollution

Pending Publication Date: 2016-12-14
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

[0008] The technical problem to be solved by the present invention is to provide a method for preparing food-grade xylose by using the waste liquid produced in the viscose staple fiber production process, using hemicellulose produced in viscose production as raw material to process xylose, and solving the problem of The problem of hemicellulose in viscose production as production sewage discharge provides a new raw material for xylose production, which realizes cross-industry linkage development and promotes the common progress of my country's viscose production technology and xylose industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for preparing food-grade xylose by using waste liquid produced in the viscose staple fiber production process, comprising the steps of:

[0042](1) Extraction of hemicellulose: use the waste liquid in the viscose production process (pressing process) as raw material, wherein the concentration of sodium hydroxide is 180 g / L, and the content of hemicellulose is 30 g / L, which will contain half The cellulose waste liquid is pretreated by plate frame and micropore, and then separated by a series nanofiltration membrane to obtain hemicellulose concentrate 1; the filter precision of the plate frame is 20 μ, and the filtration precision 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 nanofiltration membrane is in the form of a wide flow channel, and the thickness of the water inlet flow channel is 50 mils. The sodium hydroxide in the hemicellulose conc...

Embodiment 2

[0051] A method for preparing food-grade xylose by using waste liquid produced in the viscose staple fiber production process, comprising the steps of:

[0052] (1) Extraction of hemicellulose: use the waste liquid in the viscose production process (pressing process) as raw material, wherein the concentration of sodium hydroxide is 280 g / L, and the content of hemicellulose is 60 g / L. The cellulose waste liquid is pretreated by plate frame and micropore, and then separated by a series nanofiltration membrane to obtain hemicellulose concentrate 1; the filter precision of the plate frame is 20 μ, and the filtration precision 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 nanofiltration membrane is in the form of a wide flow channel, and the thickness of the water inlet flow channel is 70 mils. The sodium hydroxide in the hemicellulose concentrate 1 The content ...

Embodiment 3

[0061] A method for preparing food-grade xylose by using waste liquid produced in the viscose staple fiber production process, comprising the steps of:

[0062] (1) Extraction of hemicellulose: use the waste liquid in the viscose production process (pressing process) as raw material, wherein the concentration of sodium hydroxide is 210 g / liter, and the hemicellulose content is 40 g / liter, which will contain hemicellulose The cellulose waste liquid is pretreated by plate frame and micropore, and then separated by a series nanofiltration membrane to obtain hemicellulose concentrate 1; the filter precision of the plate frame is 20 μ, and the filtration precision 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 nanofiltration membrane is in the form of a wide flow channel, and the thickness of the water inlet flow channel is 55 mils. The sodium hydroxide in the hem...

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Abstract

The invention relates to a method for preparing food-grade xylose by utilizing waste liquid generated in a production process of viscose staple fibers. The method comprises the following steps: carrying out optimized combination on the waste liquid generated by a squeezing procedure in a viscose staple fiber production process through utilizing a series connection type nanofiltration membrane and electrodialysis; hydrolyzing, neutralizing and de-coloring, carrying out ion exchange, carrying out membrane concentration, evaporating, crystallizing and drying to obtain a xylose finished product. According to the method provided by the invention, the food-grade xylose is prepared by taking hemicellulose in the waste liquid generated in a viscose production process, and the problem that a lot of waste liquid containing the hemicellulose in the viscose production process cannot be treated effectively prior to discharge, so that social environmental pollution is caused is solved; the hemicellulose in the waste liquid is used as a raw material for producing the xylose, and a new way is provided for sources of the raw materials of the xylose.

Description

technical field [0001] The invention relates to a method for preparing xylose, in particular to a method for preparing food-grade xylose by using waste liquid produced in the production process of viscose staple fiber. Background technique [0002] Xylose is a pentose sugar. Natural D-xylose exists in plants in the form of polysaccharides. Since they are abundant especially in discarded parts of agricultural products (for example, cobs of corn, stalks, husks of cotton bolls), their utilization has been of great interest since ancient times. [0003] It has the following characteristics: [0004] 1) It is not digested and absorbed, has no energy value, and can satisfy the needs of those who love desserts and worry about gaining weight to the greatest extent. [0005] 2) Activate bifidobacteria in the human intestinal tract and promote their growth. Bifidobacteria are beneficial bacteria. The more bacteria there are, the better for human health; eating xylose can improve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13K13/00
CPCC13K13/002
Inventor 陈学江郑柏山于捍江么志高郑东义周殿朋庞艳丽王大明李贵旺张荣生岳春艳卢方汪进秋
Owner 唐山三友集团兴达化纤有限公司
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