Fractionation for full boiling range gasoline desulfurization
US6726835B2 · kind B2 · utility
12Cited by
7References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2002 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Dec 17, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2400/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Savings in the processing of a naphtha boiling range feed containing a thiophene are achieved by fractionating the feed stream in a single dividing wall column to yield a C6-minus overhead stream, a side-draw containing the majority of the C6 and C7 paraffins and olefins, and a bottoms stream comprising C7 and heavier hydrocarbons. A dividing wall column provides better control of the concentration of both thiophene and toluene in the side-draw. Less of the valuable naphtha is lost and the amount of thiophene in the overhead product is minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.