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Technology for exacting semi fibers by using viscose fiber pressed alkali liquor as raw materials

A technology for squeezing lye and viscose fiber, which is applied in the field of resource utilization of viscose fiber production, can solve the problems of being unfavorable for large-scale production, small filter area of ​​a single membrane, low operation efficiency, etc. High operating efficiency and less damage

Inactive Publication Date: 2015-01-28
YIBIN GRACE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The membrane single filter area used in this patent is small, the operating efficiency is low, and the operating cost is high, which is not conducive to large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The process of extracting semi-fiber by using viscose fiber squeezed lye as raw material, the squeezed lye produced by viscose fiber is pre-filtered to remove large particles of impurities, and then enters the ultrafiltration membrane for treatment, and the permeate is circulated and concentrated through the nanofiltration membrane 2 Once, the last concentrated solution is diluted with water and then sent to the ceramic membrane for filtration, and the obtained concentrated solution is neutralized with acid to obtain a semi-fiber liquid; the nanofiltration membrane is circulated and concentrated twice, and before each filtration, the feed liquid After being diluted with water, it enters the nanofiltration membrane.

Embodiment 2

[0038] The process of extracting semi-fibres by using viscose fiber squeezed lye as raw material. The pressed lye produced by viscose fiber is pre-filtered to remove large particles of impurities, and then enters the ultrafiltration membrane for treatment, and the permeate is circulated and concentrated through the nanofiltration membrane for 3 Once, the last concentrated solution is diluted with water and sent to ceramic membrane for filtration, and the obtained concentrated solution is neutralized with acid to obtain a semi-fiber liquid; the nanofiltration membrane is concentrated 3 times in circulation, and before each filtration, the feed liquid After being diluted with water, it enters the nanofiltration membrane.

Embodiment 3

[0040] The process of extracting semi-fibres using viscose fiber squeezed lye as raw material, the squeezed lye produced by viscose fiber is pre-filtered to remove large particles of impurities, and then enters the ultrafiltration membrane for treatment, and the permeate is circulated and concentrated through the nanofiltration membrane 4 Once, the last concentrated solution is diluted with water and sent to ceramic membrane for filtration, and the obtained concentrated solution is neutralized with acid to obtain a semi-fiber liquid; the nanofiltration membrane is concentrated 4 times in circulation, and before each filtration, the feed liquid After being diluted with water, it enters the nanofiltration membrane.

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Abstract

The invention provides a technology for exacting semi fibers by using viscose fiber pressed alkali liquor as raw materials. The technology is characterized in that the pressed liquor produced by viscose fibers is firstly processed in a pre-filter manner to remove impurities with large particles to enter an ultra filter membrane to be processed, the penetrated liquor is concentrated two to four times in a circulating manner through a nano filter film, the final concentrated liquor is diluted by adding the water to be sent into a ceramic membrane to be filtered, the acid is added into the obtained concentrated liquor to neutralize to obtain semi fiber liquor; the nano filter membrane is concentrated two to four times in a circulating manner, and before every filtration, the material liquor is diluted by adding the water to enter the nano filter film. The alkali containing concentration of the obtained semi fiber liquor is low, the salinity is low, the purity of the semi fibers is high, the operating efficiency of the technology is high, and the technology is suitable for mass production.

Description

technical field [0001] The invention belongs to the resource utilization field of viscose fiber production, and in particular relates to a process for extracting semi-fibres by using viscose fiber pressed lye as a raw material. Background technique [0002] Hemicellulose is a natural polymer that exists widely in the world. Under the circumstances of increasingly depleted energy sources and increasingly serious greenhouse effect, the development and utilization of biomass has been paid more and more attention by human beings, but there are still many difficulties. The hemicellulose This is especially true for comprehensive utilization. Due to its own shortcomings, such as easy degradation and difficult separation, its utilization value is often easily overlooked by people. [0003] In the production process of viscose fiber made of chemical pulp (wood pulp, cotton pulp, straw pulp, reed pulp, etc.) step. The high concentration of hemicellulose has an extremely adverse effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/14
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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