Patent ID: 6649064
Filing Date: 2003-11-18
Classification: B01D,C01B,C02F

Abstract:
A method for simultaneously removing metallic ions and particulate material from an aqueous acid solution, comprising contacting said solution with a composition suitable for simultaneously removing metallic ions and particulate material contained in said solution and recovering a purified and filtered solution essentially depleted of metallic ions and particulate material to sub-parts-per-billion; wherein the composition comprises a membrane ligand combination represented by the formula:Mâ€”Bâ€”L wherein M is a membrane or composite membrane having a hydrophilic or partially hydrophilic surface and containing polar functional groups and having a pore size sufficient to filter particulate material contained in said solution; L is a ligand having an affinity for metallic ions and containing a functional group reactive with an activated polar group from the membrane; and B is a covalent linkage formed by the reaction between the activated polar group and the functional group of the ligand.