Patent ID: 6248931
Filing Date: 2001-06-19
Classification: B01D,C07C

Abstract:
A process for recovering a permeable component containing a Group 7A element from a feed stream containing the permeable component and a nonpermeable component, the process comprising the steps of:a) passing a feed stream comprising a permeable component containing a Group 7A element and a nonpermeable component to a membrane separation zone comprising a resin membrane comprising a polymer or copolymer containing the polymer repeat unit represented by the formula, ##STR3##wherein S is the sulfonic acid group or its salified form and wherein n represents the average number of polymer repeat units in the polymer or copolymer and wherein the polymer or copolymer has a molecular weight above about 10,000 and a degree of substitution of S groups of from about 0.2 to about 4; andb) withdrawing from the membrane separation zone a permeate stream comprising the permeable component.