Making an olefin product from an oxygenate

US6437208B1 · kind B1 · utility

Assignee

• ExxonMobil Chemical Patents Inc. · US

Inventors

• Keith H. Kuechler · Friendswood, US
• Marcel Janssen · Kessel-Lo, BE
• Stephen Vaughn · Kingwood, US
• Shun C. Fung · Bound Brook, US
• Nicolas Coute · Houston, US
• Jeffrey S. Smith · Overland Park, US
• James R. Lattner · University Park, US
• Jeffrey L. White · Cary, US
• Teng Xu · Santa Clara, US
• William L. Kuechler, Sr. · Hilton Head Island, US
• Machteld M. Mertens · Boortmeerbeek, BE
• Cornelius W. M. Van Oorschot · Brasschaat, BE

Key dates

• Filing date: Jan 11, 2000
• Grant date: Aug 20, 2002
• Expiry date: Jan 11, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P30/40
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Disclosed is a method for making olefin product from an oxygenate-containing feedstock. In the method, a silicoaluminophosphate molecular sieve catalyst is contacted with the oxygenate-containing feedstock in a reactor at an average catalyst feedstock exposure index of at least 1.0. The method produces lower coke yield and provides an olefin product which is low in C1-C4 paraffin content. The invention is particularly effective in producing an olefin product having a very low propane content.