Sulfur removal systems for protection of reforming catalysts

US5518607A · kind A · utility

Inventors

• Leslie A. Field · Portola Valley, US
• Ann Marie K. Hall · Bellingham, US
• Richard C. Robinson · Lindon, US
• Robert L. Jacobson · Vallejo, US
• Warren E. Brown · Hercules, US
• Dennis L. Holtermann · Crockett, US

Key dates

• Filing date: Jan 4, 1993
• Grant date: May 21, 1996
• Expiry date: Jan 4, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G69/08
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process is disclosed for removing residual sulfur from a hydrotreated naphtha feedstock. The feedstock is contacted with molecular hydrogen under reforming conditions in the presence of a less sulfur sensitive reforming catalyst to convert trace sulfur compounds to H.sub.2 S, and to form a first effluent. The first effluent is contacted with a solid sulfur sorbent to remove the H.sub.2 S and form a second effluent. The second effluent is then contacted with a highly selective reforming catalyst under severe reforming conditions. Also disclosed is a method using a potassium containing sulfur sorbent made from nitrogen-free potassium compounds.