Processing for eliminating sulfur-containing compounds and nitrogen-containing compounds from hydrocarbon
US7198712B2 · kind B2 · utility
22Cited by
3References
22Claims
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Key dates
| Filing date | Jun 17, 2003 |
| Grant date | Apr 3, 2007 |
| Priority date | — |
| Expiry date | Dec 18, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G29/205
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
For desulfurization and, if necessary, for denitrification of hydrocarbon fractions the hydrocarbon mixture is brought into contact with a non-aqueous ionic liquid of general formula Q+A−, wherein Q+ is a ammonium, phosphonium or sulfonium cation, that contains at least one alkylating agent of the formula RX−, making it possible to form ionic sulfur-containing derivatives (and, if necessary, nitrogen-containing derivatives) that have a preferred solubility in the ionic liquid; and the ionic liquid is separated from the hydrocarbon mixture that is low in sulfur and nitrogen by decanting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.