Refinement of sulfonated hydrocarbons
US4361520A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1980 |
| Grant date | Nov 30, 1982 |
| Priority date | — |
| Expiry date | Oct 2, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C309/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In a process for the production of sulfonated hydrocarbon from a petroleum feedstock, e.g., crude oil or gas oil, enhanced separation of unreacted free hydrocarbon from the sulfonate product is obtained by two separations. The acidic product obtained from the sulfonation of the hydrocarbon is subjected to an incomplete separation from the unreacted hydrocarbon wherein from about 7 to about 12 percent by volume of the free unreacted hydrocarbon is retained in the product. Thereafter, the product is neutralized and subjected to a final separation in which the remainder of free unreacted hydrocarbon is removed from the sulfonated product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.