Method for preparing ammonium hydroxyalkyl sulfonates and ammonium alkanoyl alkyl sulfonates produced therefrom
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United States of America Patent
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Apr 14, 1998
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app pub date -
Jul 28, 1995
filing date -
Jun 26, 1991
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Abstract
A method is disclosed for preparing ammonium hydroxyalkyl sulfonate by a process of reacting ammonium bisulfite and alkylene oxide wherein the pH is maintained at a relatively low value throughout most of the time of reaction of ammonium bisulfite and alkylene oxide in order to minimize the quantity of impurities, e.g. alkylene glycol and alkanolamine, in the ammonium hydroxyalkyl sulfonate. Ammonium alkanoyl alkyl sulfonates prepared by reacting such ammonium hydroxyalkyl sulfonates with fatty acids form aqueous solutions which are clear at ambient temperatures, and thus are useful as surfactants in clear liquid products.
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