Process for preparing solid betaines
US5075498A · kind A · utility
6Cited by
9References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1991 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Feb 8, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C227/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Betaines are produced in solid form by reacting a tert-amine with a haloalkanoate salt when the reaction is conducted in a polar aprotic solvent in which the betaine is substantially insoluble. In a preferred embodiment, the tert-amine is an N-alkyldimethylamine, the haloalkanoate is sodium chloroacetate, and the solvent is ethyl acetate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.