High flux positively charged nanofiltration membranes prepared by UV-initiated graft polymerization of methacrylatoethyl trimethyl ammonium chloride (DMC) onto polysulfone membranes

2011 ◽  
Vol 366 (1-2) ◽  
pp. 363-372 ◽  
Author(s):  
Huiyu Deng ◽  
Youyi Xu ◽  
Qingchun Chen ◽  
Xiuzhen Wei ◽  
Baoku Zhu
Keyword(s):  
Ammonium Chloride ◽  
Graft Polymerization ◽  
High Flux ◽  
Trimethyl Ammonium Chloride ◽  
Nanofiltration Membranes ◽  
Positively Charged ◽  
Polysulfone Membranes

Preparation and Characterization of Positively Charged Quaternized Chitosan/PEI Composite Nanofiltration Membranes

2013 ◽  
Vol 721 ◽  
pp. 45-48
Author(s):  
Run Lin Han
Keyword(s):  
Ammonium Chloride ◽  
Composite Membrane ◽  
Inorganic Salts ◽  
Nanofiltration Membranes ◽  
Functional Layer ◽  
Charged Membrane ◽  
High Valent ◽  
Optimized Conditions ◽  
Positively Charged

2-Hydroxypropyltrimethyl ammonium chloride chitosan (HACC) with positively charged character was utilized to fabricate the functional layer of the composite NF membrane and reinforced polyetherimide (PEI) ultrafiltration (UF) membrane was used as the support layer. When the composite membrane was prepared under optimized conditions and tested at 0.4 MPa and 10 oC, the flux of the composite NF membrane was about 18 L/m2h and the MgCl2 rejection of it was about 81.6%. The composite membrane showed classical positively charged membrane character which had higher rejection to high valent inorganic salts.

scholarly journals Understanding the Reaction Crystallization Process of Glycidyl Trimethyl Ammonium Chloride

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 449
Author(s):  
Shuai Yu ◽  
Hui Chen ◽  
Xujie Gao ◽  
Weichun Feng ◽  
Wenguo Xing ◽  
...  
Keyword(s):  
Ammonium Chloride ◽  
Crystallization Process ◽  
Crystal Form ◽  
Trimethyl Ammonium Chloride ◽  
Key Factors ◽  
Factors Affecting ◽  
Seed Dispersion ◽  
Seed Growth ◽  
Seed Method ◽  
Crystal Seed

Reaction crystallization to produce glycidyl trimethyl ammonium chloride (GTA) via epichlorohydrin with gas-state trimethylamine was investigated. The crystallization process of the GTA gas-liquid reaction was optimized by a seed method. The optimized technology can prepare GTA products with crystal form and purity greater than 97%. The crystallization process of GTA consists of four steps (i.e., addition of seed, dispersion of seed, growth of crystals on the seed surfaces, agglomeration and growth of crystal). Seed method and flow rate are the key factors affecting purity. The purity and particle size of GTA crystals were satisfactory as long as the operation was kept within the defined envelope. The experiments were conducted on a 1 L reactor and successfully scaled-up to 3000 L in industry.

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