Method for the synthesis of betaines containing.ltoreq.10 ppm of organically bound chlorine
US5470992A · kind A · utility
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Key dates
| Filing date | Mar 14, 1994 |
| Grant date | Nov 28, 1995 |
| Priority date | — |
| Expiry date | Mar 14, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C231/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for the synthesis of betaines of the general formula ##STR1## by quaternizing the fatty acid amide dialkylamines of the general formula ##STR2## with .omega.-halogenalkylcarboxylic acids of the formula X-(CH.sub.2).sub.y COOH, wherein X is a halogen group, or their salts in aqueous solution, the reaction being carried out within a temperature range of 115.degree. to 180.degree. C., until organically bound chlorine can no longer be detected, the fatty acid amide dialkylamine optionally being quaternized partially or completely in a first step at 80.degree. to 100.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.