Process for selectively producing C3 olefins in a fluid catalytic cracking process

US6313366A · kind A · utility

Assignee

• ExxonMobil Chemical Patents Inc. · US

Inventors

• Paul K. Ladwig · Dover, US
• John E. Asplin · Houston, US
• Gordon F. Stuntz · Baton Rouge, US
• William A. Wachter · Baton Rouge, US
• Brian Erik Henry · Baton Rouge, US
• Shun C. Fung · Bound Brook, US
• Tan-Jen Chen · Kingwood, US
• Jay F. Carpency · Seabrook, US
• Ronald G. Searle · Houston, US

Key dates

• Filing date: May 19, 2000
• Grant date: Nov 6, 2001
• Expiry date: May 19, 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 propylene from a catalytically cracked or thermally cracked naphtha stream is disclosed herein. The naphtha stream 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.degree. C. to 650.degree. C. and a hydrocarbon partial pressure from about 10 to 40 psia. A separate stream containing aromatics may be co-fed with the naphtha stream.