Patent ID: 8323502
Filing Date: 2012-12-04
Classification: B01J,C07K,C08G,C08L,Y10T

Abstract:
1. A method of cleaning a metal selected from the group consisting of platinum, gold and silver from a waste stream, the method comprising treating the waste stream using a composition comprising a base macromolecule chemically bonded to a solid particulate substrate wherein the base macromolecule is selected from the group consisting of: (a) dendrimers and, (b) hyperbranched polymers and, wherein the base macromolecule is surmounted by at least one chemically bound additional layer of macromolecule to form at least one chemically bonded layer on the base macromolecule, wherein the layered macromolecule is selected from the group consisting of: (i) dendrimers and, (ii) hyperbranched polymers.