Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Membrane concentration process of extracting hemicellulose from pressed liquid produced by viscose fiber production

A viscose fiber and squeeze liquid technology, which is applied in the resource utilization field of viscose fiber production, can solve the problems that are not conducive to large-scale production, small filter area of ​​a single membrane, and low operating efficiency, so as to achieve low cost and high process operation High efficiency and low alkali concentration effect

Inactive Publication Date: 2015-01-28
YIBIN GRACE GROUP CO LTD
View PDF8 Cites 1 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A membrane concentration process for extracting semi-fiber from viscose fiber production press liquid. The press liquid produced by viscose fiber is first pre-filtered to remove large particles of impurities, the permeate is concentrated twice through nanofiltration membrane circulation, and the last concentrated liquid is After being diluted with water, it is 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 is diluted with water and then enters the nanofiltration membrane.

Embodiment 2

[0038] A membrane concentration process for extracting semi-fibers from viscose fiber production press liquid. The press liquid produced by viscose fiber is first pre-filtered to remove large particles of impurities, the permeate is concentrated 3 times through nanofiltration membrane circulation, and the last concentrated liquid is After being diluted with water, it is 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 for 3 times, and before each filtration, the feed liquid is diluted with water and then enters the nanofiltration membrane.

Embodiment 3

[0040] A membrane concentration process for extracting semi-fibers from viscose fiber production press liquid. The press liquid produced by viscose fiber is first pre-filtered to remove large particles of impurities, the permeate is concentrated 4 times through nanofiltration membrane circulation, and the last concentrated liquid is After being diluted with water, it is 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 concentrated 4 times in circulation, and before each filtration, the feed liquid is diluted with water and then enters the nanofiltration membrane.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
areaaaaaaaaaaa
areaaaaaaaaaaa
Login to View More

Abstract

The invention provides a membrane concentration process of extracting hemicellulose from pressed liquid produced by viscose fiber production. The membrane concentration process is characterized by comprising the following steps: prefiltering the pressed liquid produced by the viscose fiber production firstly to remove large-particle impurities, concentrating permeated liquid by a nanofiltration membrane for 2-4 times in a circulation mode, conveying a concentrated liquid obtained at the last time into a ceramic membrane to be filtered after being diluted by adding water, and neutralizing the obtained concentrated liquid by adding acid to obtain hemicellulose liquid. According to the membrane concentration process provided by the invention, the nanofiltration membrane is used for concentration for 2-4 times in the circulation mode; before filtration for each time, feed liquid enters the nanofiltration membrane after being diluted by water; the obtained hemicellulose liquid is low in alkali concentration, low in salinity, high in hemicellulose purity, high in process running efficiency and applied to large-scale production.

Description

technical field [0001] The invention belongs to the resource utilization field of viscose fiber production, and in particular relates to a membrane concentration process for extracting semi-fibers from press liquid in viscose fiber production. 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 extrem...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com