Zeolite catalyst

US4595670A · kind A · utility

Assignee

• Exxon Research and Engineering Company · US

Inventors

• Samuel J. Tauster · Englishtown, US
• Angelo A. Montagna · Pittsburgh, US
• John J. Steger · Pittstown, US
• Shun C. Fung · Bound Brook, US
• Virginia R. Cross · Houston, US

Key dates

• Filing date: Nov 10, 1983
• Grant date: Jun 17, 1986
• Expiry date: Nov 10, 2003

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J29/62
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A class of catalysts which exhibit superior activity maintenance in dehydrocyclization reactions are defined as a type L zeolite having exchangeable cations of which at least 75% are selected from Group IA and calcium and barium cations and containing well dispersed particles of at least one Group VIII noble metal where at least 90% of the noble metal prior to reduction thereof is dispersed in the form of particles having a diameter less than 7 .ANG.. The catalysts may also be identified as type L zeolites loaded with at least one Group VIII noble metal which have a terminal cracking index (as a measure of production of pentanes versus butanes from hexane) of at least 1.5.