Polar-nonpolar solvent system for deoiling hydrocarbon sulfonates
US4321216A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1980 |
| Grant date | Mar 23, 1982 |
| Priority date | — |
| Expiry date | Jan 22, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/44
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Hydrocarbon sulfonates, e.g., petroleum sulfonates, are separated from unsulfonated hydrocarbon e.g., petroleum hydrocarbon oil, by employing a mixture or solvent system comprising an immiscible polar and a nonpolar component. Preferably the immiscible polar component is a carboxylic acid having from 1 to about 4 carbon atoms e.g., formic acid, and the nonpolar hydrocarbon is one containing 3 to about 12 carbon atoms and can be at least one of an alkane, cycloalkane, aromatic and akylated aromatic, an alkene, or a cycloalkene. A petroleum sulfonate is separated from unsulfonated petroleum oil employing a mixture of formic acid and n-octane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.