Process for preparing an internal olefin sulfonate
US9221750B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2013 |
| Grant date | Dec 29, 2015 |
| Priority date | — |
| Expiry date | Feb 22, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/584
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for preparing an internal olefin sulfonate, comprising sulfonating an internal olefin, having an average carbon number that is equal to or greater than 20, in a sulfonation reactor into sulfonated internal olefin followed by contacting sulfonated internal olefin with a base containing solution, wherein the sulfonation reactor is cooled with a cooling means having a temperature which is greater than 35° C. Further, the invention relates to an internal olefin sulfonate obtainable by said process, and to use of internal olefin sulfonates obtainable or obtained by said process as a surfactant, suitably as a surfactant in chemical Enhanced Oil Recovery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.