Method of preparing N-(2-aminoalkyl)-2-aminoethoxylate ethane sulfonate
US6124496A · kind A · utility
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Key dates
| Filing date | Oct 16, 1998 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | Oct 16, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/3872
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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: EQU 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: EQU 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 PA1 n=1-3 PA1 A=K or Na
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.