Process for producing polypropylene from C3 olefins selectively produced in a fluid catalytic cracking process from a naphtha/steam feed

US6258990A · kind A · utility

Assignee

• EXXONMOBIL 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
• B. Erik Henry · Katy, US
• John E. Asplin · Houston, US

Key dates

• Filing date: Mar 2, 2000
• Grant date: Jul 10, 2001
• Expiry date: Mar 2, 2020

Classification

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

Abstract

A process for producing polymers from C.sub.2 -C.sub.4 olefins selectively produced from a catalytically-cracked or thermally-cracked naphtha stream is disclosed herein. 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 that include temperatures from about 500.degree. C. to 650.degree. C. and a hydrocarbon partial pressure from about 10 to 40 psia.