Method for deaeration of cellulose ionic liquid solution

A technology of ionic liquid and cellulose, which is applied to artificial filaments in cellulose solution, fiber treatment, filament molding treatment, etc., to achieve the effects of improving heat transfer coefficient, short residence time, and uniform diffusion distribution

Active Publication Date: 2011-07-27
潍坊欣龙生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for defoaming cellulose ionic liquid solution to solve the problem of removing air bubbles in high temperature and high viscosity cellulose / ionic liquid solution

Method used

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  • Method for deaeration of cellulose ionic liquid solution
  • Method for deaeration of cellulose ionic liquid solution
  • Method for deaeration of cellulose ionic liquid solution

Examples

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Comparison scheme
Effect test

Embodiment 1

[0027] Degassing of cellulose / 1-allyl-3-methylimidazolium chloride solution with a concentration of 10 wt%

[0028] Cotton pulp with a degree of polymerization of 595 was crushed into a fine powder of about 100 mesh, and baked in a vacuum oven at 95°C for 8 hours to obtain dry cotton pulp. Then the dry cotton pulp fines and 1-allyl-3-methylimidazolium chloride [AMIM]Cl) were stirred and mixed at 95° C. according to a weight percentage of 1:9 to obtain a cellulose ionic liquid solution. The solution was then kept at 95° C. for 20 h.

[0029] After the heat preservation is completed, the temperature of the solution is raised to 115°C, and then the solution enters the evaporator radially from above the evaporator, and is distributed to the heating wall of the evaporator through the distributor, and the ionic liquid solution is continuously and evenly heated by the rotating scraper. The wall is scraped into a uniform thickness of 1mm liquid film, and the liquid film is turbulent ...

Embodiment 2

[0031] Degassing of 10wt% cellulose / 1-butyl-3-methylimidazolium chloride solution

[0032] Cotton pulp with a degree of polymerization of 509 was crushed into a fine powder of about 100 mesh, and baked in a vacuum oven at 100°C for 6 hours to make dry cotton pulp. Then the dry cotton pulp fines and 1-butyl-3-methylimidazolium chloride [BMIM]Cl) were stirred and mixed at 98°C according to the weight percentage of 1:9 to obtain a cellulose ionic liquid solution, and then The solution was kept at 98° C. for 24 hours.

[0033] After the heat preservation is completed, the temperature of the solution is raised from 98°C to 110°C, and then the solution enters the evaporator radially from above the evaporator, and is distributed to the heating wall of the evaporator through a distributor, and the ionic liquid solution is continuously and evenly distributed by a rotating scraper. Gently scrape a uniform thickness of 1mm liquid film on the heating wall surface, and make the liquid fil...

Embodiment 3

[0035] Degassing of cellulose / 1-butyl-3-methylimidazolium chloride solution with a concentration of 8 wt%

[0036]Cotton pulp with a degree of polymerization of 509 was crushed into a fine powder of about 100 mesh, and baked in a vacuum oven at 100°C for 6 hours to make dry cotton pulp. Then the dry cotton pulp fines and 1-butyl-3-methylimidazolium chloride [BMIM]Cl) were stirred and mixed evenly at 95° C. according to the weight percentage of 8:92 to obtain a cellulose ionic liquid solution, and then The solution was kept at 95° C. for 18 hours.

[0037] After the heat preservation is over, raise the temperature of the solution to 110°C, then radially enter the evaporator from above the evaporator, distribute it to the heating wall of the evaporator through the distributor, and heat the ionic liquid solution continuously and evenly through the rotating scraper. The wall is scraped into a uniform thickness of 1mm liquid film, and the liquid film is turbulent on the heated wal...

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Abstract

The invention discloses a method for deaeration of cellulose ionic liquid solution, which comprises deaeration of cellulose ionic liquid solution with a thin-film evaporator. The method also comprises insulation storage and heating treatment of the ionic liquid prior to the deaeration. Since the insulation and heating are carried out prior to the deaeration with the thin-film evaporator, the viscosity and performance of the solution can satisfy the requirements of the existing deaeration equipment for the high-temperature and high-viscosity cellulose ionic liquid solution, and the deaeration effect can be ensured. Therefore, the invention can satisfy the use requirements of the industrial production and solves the bottleneck problem of the product of the cellulose ionic liquid solution inthe spinning industry.

Description

technical field [0001] The invention relates to a method for defoaming a spinning liquid system in a solvent spinning process, in particular to a method for defoaming a cellulose ion liquid solution. Background technique [0002] Cellulose fiber is an important raw material for clothing textiles and industrial textiles, but the output and performance of natural fibers are difficult to meet the current market needs, and the traditional production process of regenerated cellulose fibers - viscose method due to serious environmental pollution, It has brought huge pressure to environmental protection, and this problem has become a bottleneck restricting the further development of regenerated cellulose fibers. Therefore, seeking new solvents for green processing of regenerated cellulose fibers has become an important research topic to solve the environmental pollution problems of traditional cellulose fibers and provide new ways for the survival of cellulose fibers. [0003] The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D1/10D01F2/02
Inventor 田素峰刘建华马峰刚姜明亮马君志李琳卢海蛟于万永
Owner 潍坊欣龙生物材料有限公司
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