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
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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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