Process for the production of petroleum sulfonate
US3956372A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1973 |
| Grant date | May 11, 1976 |
| Priority date | — |
| Expiry date | Nov 2, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C309/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Petroleum sulfonates useful to impart micellar characteristics to mixtures of hydrocarbon and aqueous medium are obtained by reacting a hydrocarbon gas oil feedstock (average molecular weight 250-700; A/AP aliphatic to aromatic proton) ratio 5-50 moles/mole, 30-100% of the feedstock molecules contain aromatic portions and the A/AP ratio of the aromatic portion being about 3-20 moles/mole) with a solution of EDC (ethylene dichloride) containing 0.1-0.3 lb. liquid SO.sub.3 /lb EDC. The SO.sub.3 concentration is about 0.1-0.3 lb. of SO.sub.3 /lb of gas oil feedstock. Reaction takes place in a back-mix tubular reactor wherein at least about 4 parts of reaction products are recycled per 1 part of reaction products withdrawn and wherein the gas oil feedstock plus recycled reaction products and the SO.sub.3 /EDC streams entering the reaction zone are in turbulent flow. Velocity ratio of the feedstock plus recycled reaction products stream to the SO.sub.3 /EDC stream is at least 4:1, respectively. The withdrawn reaction products are neutralized with an aqueous basic liquid, e.g. aqueous solution, NH.sub.4 OH and thereafter the EDC is recovered from the neutralized reaction products to obta…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.