Patent ID: 7294654
Filing Date: 2007-11-13
Classification: B01J,C02F,C08J,C08L

Abstract:
1. The method forming a precursor for a heterogenous thermally regenerable salt sorbent having two relatively independent phases by polymerizing in the presence of a host macroporous copolymer a first polyunsaturated monomer and a monoethylenically unsaturated monomer containing a haloalkyl group to form a guest crosslinked copolymer, wherein said host macroporous copolymer is formed from a second polyunsaturated monomer and a monoethylenically unsaturated monomer containing a functionality convertible to a weak acid, comprising the steps of (a) intimately mixing at a temperature less than about 40° C. a nonaqucous solution of said first polyunsaturated monomer, said monoethylenically unsaturated monomer containing a haloalkcyl group and a polymerization initiation reagent with said macroporous copolymer as a solid to imbibe said solution into said solid macroporous copolymer; and (b) heating the mixture formed in step (a) within the temperature range of about 70° C. to 100° C. for a period of time sufficient to polymerize said monomers to thereby form said precursor.