Constructing positively charged acid-resistant nanofiltration membranes via surface postgrafting for efficient removal of metal ions from electroplating rinse wastewater was written by Bai, Yong;Gao, Peng;Fang, Rong;Cai, Jing;Zhang, Li-Dan;He, Qin-Yuan;Zhou, Zi-Hao;Sun, Shi-Peng;Cao, Xue-Li. And the article was included in Separation and Purification Technology in 2022.Application In Synthesis of Trimesoylchloride This article mentions the following:
To efficiently recycle metal ions from electroplating wastewater, a pos. charged acid-resistant nanofiltration membrane was prepared by coupling interfacial polymerization and postgrafting modification with an ethanol grafting solution containing N-(3-aminopropyl)-imidazole (ANPI). Ethanol, as the grafting solvent, not only slightly swelled the original polyamide (PA) layer but also is mutually miscible with n-hexane, which prevented the formation of addnl. PA layers. ANPI, as the grafting monomer, was covalently bound to the -COCl groups of the PA layer to guarantee grafting stability. Due to the inhibited hydrolysis of the -COCl group by ethanol, more ANPI was grafted on the PA layer, which could be easily protonated under low pH. This resulted in a looser, thinner and pos. charged selectivity layer. The membrane permeability was improved by 56.0 卤 0.55% with high interception performance (> 98% for Cu2+ and Ni2+ ions) in electroplating rinse wastewater. The formed pos. protective layer prevented H+ ions from attacking the -CO-NH- bonds, resulting in strong stability after immersion in 10 wt% H2SO4 and H3PO4. Therefore, the obtained membrane shows promise for application in highly acidic wastewater. In the experiment, the researchers used many compounds, for example, Trimesoylchloride (cas: 4422-95-1Application In Synthesis of Trimesoylchloride).
Trimesoylchloride (cas: 4422-95-1) belongs to organic chlorides. Organic chlorides can be used in production of: PVC, pesticides, chloromethane, teflon, insulators. Aryl chlorides may be prepared by the Friedel-Crafts halogenation, using chlorine and a Lewis acid catalyst.Application In Synthesis of Trimesoylchloride
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics