Patent ID: 6475340
Filing Date: 2002-11-05
Classification: B01D,B01J,D21H

Abstract:
A solid phase extraction sheet for removing one or more chemical species dissolved or entrained in a fluid, said sheet comprising a mixture of:a) a porous polymeric pulp comprising fibers, said polymeric pulp being selected from the group consisting of aramid, polyethylene, and polypropylene fibers; b) from about 3 to about 7 weight percent of a polymeric hydrocarbon binder selected from the group consisting of natural rubber, neoprene, acrylate resins, polyvinyl acetate, and styrene-butadiene copolymer; and c) particles entrapped in said pulp, some of said particles exhibiting at least one of reactive and sorptive properties toward said chemical species, said particles being present in an amount such that the weight ratio of particles to binder is at least 13:1, said sheet being produced by a wet-laid processs.