Method for removing sulfur to ultra low levels for protection of reforming catalysts
US5322615A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1991 |
| Grant date | Jun 21, 1994 |
| Priority date | — |
| Expiry date | Dec 10, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G67/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Provided is a method for removing residual sulfur from a hydrotreated naphtha feedstock. The process comprises contacting the naphtha feedstock with a first solid sulfur sorbent comprising a metal on a support to thereby form a first effluent. The effluent is then contacted with a sulfur conversion catalyst comprising a Group VIII metal in the presence of hydrogen, with the resulting effluent being contacted with a second solid sulfur sorbent containing a Group IA or IIA metal, to thereby lower the sulfur content of the feedstock to less than 10 ppb, and to as low as 1 ppb or less. The feedstock can then be safely used with highly sulfur sensitive zeolitic reforming catalysts without adversely affecting the useful life of the catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.