Process for converting hydrocarbon feed to high purity benzene and high purity paraxylene

US6004452A · kind A · utility

Assignee

• Chevron Chemical Co. · US

Inventors

• Gary A Ash · Kingwood, US
• Nhu Q Dao · Richmond, US
• Arnold J. Gloyn · Walnut Creek, US
• N J Haritatos · Corona, US
• Paul I Hodgen · Sugar Land, US
• Stuart R MacPherson · Mobile, US
• Scott G. Morrison · Kingwood, US
• Gerald J. Nacamuli · Mill Valley, US
• Paul M. Spindler · Kingwood, US
• Bruce J. Thom · Concord, US
• Eric P. Weber · Kingwood, US
• Richard M Wolpert · Berkeley, US

Key dates

• Filing date: Nov 14, 1997
• Grant date: Dec 21, 1999
• Expiry date: Nov 14, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G59/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process is provided for producing high purity benzene and high purity paraxylene from a hydrocarbon feed. In one aspect, the process comprises: (a) reforming a hydrocarbon feed using either a monofunctional catalyst or a bifunctional catalyst to provide one or more reformate streams; (b) fractionating the reformate stream to provide a toluene stream, a benzene stream, and a xylene stream; (c) subjecting the toluene stream to disproportionation; (d) purifying the benzene stream by extraction followed by distillation to provide a high purity benzene product; and (e) purifying the xylene stream by simulated moving bed countercurrent adsorption followed by crystallization to provide a high purity paraxylene product.