Patent ID: 6586099
Filing Date: 2003-07-01
Classification: B01J,C02F,C22B,D06M,Y02P,Y10T

Abstract:
A collector having an amidoxime group and a hydrophilic group for removing dissolved metals from seawater which is produced by the steps of,exposing a substrate fiber in the form of either a nonwoven or a woven cloth to radiation to generate a reaction initiating radical on the fiber, wherein the nonwoven or woven cloth is made of a fiber of a core/sheath structure that has a polyolefinic fiber coated with a different polyolefin, co-grafting a polymerizable monomer having a cyano group onto the radiated polyolefin fiber in the presence of a polymerizable monomer having a hydrophilic group, and reacting the cyano groups in the graft side chains with hydroxylamine to convert them to amidoxime groups, whereby both amidoxime and hydrophilic groups are introduced into the same graft side chains and wherein the amidoxime group and hydrophilic groups are introduced at a molar ratio of 70:30-30:70.