Removal of residual sulfur dioxide from dimethyl sulfate
US7777065B2 · kind B2 · utility
0Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2006 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | May 17, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/44
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a method of removing SO2 contaminants from dimethyl sulfate (DMS) by treatment with an oxidizing agent, and to a process for the preparation of odor free fatty acid trialkanolamine esters quaternized with DMS which is substantially free of SO2 contaminants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.