Method of making thermally regenerable salt sorbent resins
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United States of America Patent
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Nov 13, 2007
Grant Date -
Oct 20, 2005
app pub date -
Mar 29, 2005
filing date -
Apr 19, 2004
priority date (Note) -
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Abstract
A heterogenous hybrid thermally regenerable salt sorbent resin is formed from a hybrid precursor resin. The hybrid precursor resin is formed by intimately mixing a dry, solid crosslinked macroporous copolymer with a solution containing a polyunsaturated monomer, a monoethylenically unsaturated monomer containing a haloalkyl group and a polymerization initiator, followed by heating to cause polymerization. The hybrid precursor resin is then treated with a weak base, then subjected to hydrolysis conditions to form, respectively, weak base groups and weak acid groups to produce the hybrid thermally regenerable salt sorbent resin.
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