Light-And Heat-Response Adsorbent And Method Of Recovering A Soluble Substance
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United States of America Patent
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Issued Date -
Aug 23, 2007
app pub date -
Jul 28, 2004
filing date -
Sep 9, 2003
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Abandoned
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Abstract
A light- and heat-response adsorbent, having an optically responding ability reversibly showing transition to adsorption and release of a soluble substance in a soluble-substance solution in response to whether light is irradiated or not and a thermally responding ability reversibly showing transition to solubilization and precipitation, or swelling and contraction, in response to temperature, preferably containing a copolymer of monomers including 1',3',3'-trimethyl-6-(acryloyloxy)spiro(2H-1-benzopyran-2,2'-indole] and N-isopropylacrylamide. Thus, the invention provides an adsorbent functioning both to adsorb and release a soluble substance from and into solution and having higher soluble-substance recovery efficiency.
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