Polyamine-based scavenger resins containing 2, 3 and 4 nitrogen atoms have been prepared and their comparative efficacy to scavenge appropriate electrophilic chemicals (acids, acid chlorides, isocyanates and aldehydes...Polyamine-based scavenger resins containing 2, 3 and 4 nitrogen atoms have been prepared and their comparative efficacy to scavenge appropriate electrophilic chemicals (acids, acid chlorides, isocyanates and aldehydes) from solutions has been studied. As expected, the scavenging efficiency is directly proportional to the number of nucleophic nitrogens present on the resin. The results have been compared with the performance of the popular scavenger resin, namely, tris(2-aminoethyl)amine resin, to conclude that the low-cost polyamine resins now prepared can be conveniently used as effectively as the expensive commercial product.展开更多
Weakacid resin,containing S functional group supported by epoxyphenolic aldehyde,was synthesized,and the adsorption properties for Ag+ were investigated.The results show that the adsorption process of resin for Ag...Weakacid resin,containing S functional group supported by epoxyphenolic aldehyde,was synthesized,and the adsorption properties for Ag+ were investigated.The results show that the adsorption process of resin for Ag+ has typical character of Freundlich.The resin has good adsorption selectivity for Ag+ existing with metal ions Cu2+,Ni2+,Pb2+ and Hg2+.The resin is also regeherable,and its desorption for Ag+ is above 95%.展开更多
文摘Polyamine-based scavenger resins containing 2, 3 and 4 nitrogen atoms have been prepared and their comparative efficacy to scavenge appropriate electrophilic chemicals (acids, acid chlorides, isocyanates and aldehydes) from solutions has been studied. As expected, the scavenging efficiency is directly proportional to the number of nucleophic nitrogens present on the resin. The results have been compared with the performance of the popular scavenger resin, namely, tris(2-aminoethyl)amine resin, to conclude that the low-cost polyamine resins now prepared can be conveniently used as effectively as the expensive commercial product.
文摘Weakacid resin,containing S functional group supported by epoxyphenolic aldehyde,was synthesized,and the adsorption properties for Ag+ were investigated.The results show that the adsorption process of resin for Ag+ has typical character of Freundlich.The resin has good adsorption selectivity for Ag+ existing with metal ions Cu2+,Ni2+,Pb2+ and Hg2+.The resin is also regeherable,and its desorption for Ag+ is above 95%.