Process for quaternary ammonium bisulfates
US5308363A · kind A · utility
1Cited by
17References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1992 |
| Grant date | May 3, 1994 |
| Priority date | — |
| Expiry date | Feb 18, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C211/63
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of a quaternary ammonium bisulfate which comprises the reaction of a quaternary ammonium alkylsulfate with sulfuric acid in a solvent mixture comprised of water and isopropyl alcohol, followed by the recovery of the solid quaternary ammonium bisulfate by crystallization from the reaction mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.