Gasoline upgrading process
US5298150A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1992 |
| Grant date | Mar 29, 1994 |
| Priority date | — |
| Expiry date | Aug 13, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2300/70
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Low sulfur gasoline of relatively high octane number is produced from a catalytically cracked, sulfur-containing naphtha by hydrodesulfurization followed by treatment over an acidic catalyst comprising a zeolite sorbing 10 to 40 mg 3-methylpentane at 90.degree. C., 90 torr, per gram dry zeolite in the hydrogen form, e.g., ZSM-22, ZSM-23, or ZSM-35. The treatment over the acidic catalyst in the second step restores the octane loss which takes place as a result of the hydrogenative treatment and results in a low sulfur gasoline product with an octane number comparable to that of the feed naphtha. The use of the specified zeolite provides greater desulfurization, gasoline selectivity, and octane than obtained using ZSM-5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.