Method of preparing N-(2-aminoalkyl)-2-aminoethoxylate ethane sulfonate
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United States of America Patent
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Sep 26, 2000
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Oct 16, 1998
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Oct 16, 1998
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Abstract
The present invention relates to a synthesis method of thionate diamine by the reaction of alkali metal isethionate with diols to form alkali metal isethionate ethoxylate having the following structural formula: HO(CH.sub.2 CH.sub.2 O).sub.n CH.sub.2 CH.sub.2 SO.sub.3 A The above isethionate ethoxylate is then reacted with aliphatic diamine having a Carbon number of 2 to 6 to form a series of N-(2-aminoalkyl)-2-aminoethyoxylate ethane sulfonate having the following structure formula: H.sub.2 N--(CH.sub.2).sub.m --NH--(CH.sub.2 CH.sub.2 O).sub.n CH.sub.2 CH.sub.2 SO.sub.3 A wherein m=2-12 n=1-3 A=K or Na
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