Processes for making alkylbenzenesulfonate surfactants and products thereof
US6602840B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2000 |
| Grant date | Aug 5, 2003 |
| Priority date | — |
| Expiry date | Jan 7, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D1/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention is in the field of processes for making alkylbenzenesulfonate surfactants. The processes herein include a combination of two essential steps, delinearization and alkylation. The delinearization step selected herein introduces particular types of limited branching into an aliphatic hydrocarbon having ten or more, but no more than about 16, carbon atoms. The hydrocarbon includes olefin having a hydrocarbon chain length suitable for detergent manufacture, e.g., C10-C14, or a corresponding paraffin. The second essential step is an alkylation step having an internal isomer selectivity of from 0 to no more than about 40 in which the hydrocarbon is used to monoalkylate benzene catalytically with an alkylation catalyst. Such alkylation catalysts preferably comprise an at least partially crystalline porous zeolite-containing solid, the zeolite having moderate acidity and intermediate pore size. Preferred alkylation catalysts include certain at least partially dealuminized acidic nonfluoridated mordenites. The processes herein further comprise sulfonating, neutralizing and incorporating the resulting modified alkylbenzenesulfonate surfactants into consumer products. The…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.