Process for selectively producing light olefins in a fluid catalytic cracking process from a naphtha/steam feed

US6118035A · kind A · utility

Assignee

• Exxon Research and Engineering Company · US

Inventors

• Shun C. Fung · Bound Brook, US
• Tan-Jen Chen · Kingwood, US
• Marcel Janssen · Leuven, BE
• William A. Wachter · Baton Rouge, US
• Brian Henry · Baton Rouge, US
• John E. Asplin · Houston, US

Key dates

• Filing date: May 5, 1998
• Grant date: Sep 12, 2000
• Expiry date: May 5, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G2400/20
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process for selectively producing C.sub.2 -C.sub.4 olefins from a catalytically cracked or thermally cracked naphtha stream is disclosed. A mixture of the naphtha stream and a stream of steam is feed into a reaction zone where it is contacted with a catalyst containing from about 10 to 50 wt. % of a crystalline zeolite having an average pore diameter less than about 0.7 nanometers at reaction conditions which include temperatures from about 500 to 650.degree. C. and a hydrocarbon partial pressure from about 10 to 40 psia.