Purification of methacrylamidopropyltrimethyl-ammonium chloride with nonionic organic resins
AssigneeTexaco Inc.
InventorsEdward E. McEntire, Edward C. Y. Nieh
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Abstract
Methacrylamidopropyltrimethylammonium chloride or its free amine, dimethylaminopropylmethacrylamide, is purified by contacting aqueous solutions of the salt or the free amine with solid, nonionic organic resins. Such resins absorb the organic impurities, yet leave behind the polymerization inhibitor.
Claims7
A process for purifying aqueous solutions of monomers containing quaternary ammonium salts or the free amine thereof without removing the same proportion of a polymerization inhibitor, which comprises contacting an aqueous solution containing from 1 to 99 percent by weight of the monomer in contact with a solid, nonionic organic resin.
A process for purifying aqueous solutions of methacrylamidopropyltrimethylammonium chloride or the free amine thereof, dimethylaminopropylmethacrylamide, without removing the same proportion of hydroquinone methylether polymerization inhibitor, which comprises contacting an aqueous solution containing from 1 to 99 percent by weight of methacrylamidopropyltrimethylammonium chloride or dimethylaminopropylmethacrylamide with a solid, nonionic organic resin.
Dependencies are inferred from the claim text.