Patent ID: 7670492
Filing Date: 2010-03-02
Classification: C08G,Y10S

Abstract:
1. A method of removing a metal ion from a water Stream comprising: (i) providing a copolymer of formula (I) wherein R 1 is independently H, an alkyl group having from 1 to 5 carbon atoms, R R R wherein a is an integer from 1 to 5 and X is with W being sulfur or oxygen, and G being hydrogen or an alkyl group having from 1 to 5 carbon atoms, or the structure wherein b is an integer from 0 to 5, c is an integer from 1 to 5, and Y′ and Y″ are different and each is NH R n is an integer greater than 10 and m is an integer greater than 1, and wherein the copolymer is characterized by clustering of the functional groups having adsorption activity as dimers, trimers, or higher oligomers integrated into the copolymer; and (ii) contacting a water stream containing a metal ion with the copolymer under conditions effective to remove the metal ion from the water stream.