Sulfonation of crude oils to produce petroleum sulfonates
US4144266A · kind A · utility
7Cited by
7References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1973 |
| Grant date | Mar 13, 1979 |
| Priority date | — |
| Expiry date | Jul 5, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/03
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Petroleum sulfonates are obtained by treating whole crude oil or topped crude oil or mixtures thereof with sulfur trioxide, removing unreacted hydrocarbon, e.g., by addition of water, and neutralizing the sulfonic acids formed with a base, e.g., sodium hydroxide or ammonia. The products have particular utility for the preparation of micellar systems for use in secondary-type petroleum recovery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.