Alkylation process for desulfurization of gasoline
US5599441A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 1995 |
| Grant date | Feb 4, 1997 |
| Priority date | — |
| Expiry date | May 31, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G29/205
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Sulfur species present in cracked naphthas are converted and removed by first passing the naphtha over an acid catalyst to alkylate the thiophenic compounds in the naphtha using the olefins, i.e., monoolefins and diolefins, present in the naphtha as alkylating agent. Alkylated thiophenes are concentrated in the heavy portion of the naphtha by distillation, reducing the amount of naphtha that needs to be hydrodesulfurized. Olefins in cracked naphthas are concentrated in the light portion of the naphtha which is not subsequently hydrotreated. Thus, octane and hydrogen consumption penalties associated with hydrotreating are minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.