Regeneration of platinum-germanium zeolite catalyst

US7745675B2 · kind B2 · utility

Assignee

• SAUDI BASIC INDUSTRIES CORPORATION · SA

Inventors

• Paul E. Ellis, Jr. · Downingtown, US
• Gopalakrishnan G. Juttu · Sugar Land, US
• Alla Khanmamedova · Sugar Land, US
• Scott F. Mitchell · Houston, US
• Scott A. Stevenson · Houston, US

Key dates

• Filing date: Dec 20, 2006
• Grant date: Jun 29, 2010
• Expiry date: Mar 28, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S585/904
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

This invention relates to a process for regeneration of a zeolite catalyst, specifically an aluminosilicate zeolite with germanium substituted in the framework for silicon and with platinum deposited on the zeolite. The catalyst may be used in a process for aromatization of alkanes, specifically C2-C8 alkanes. The regeneration process 1) removes coke and sulfur from the catalyst via oxidation, 2) redisperses platinum on the surface of the catalyst via chlorine gas, 3) removes chlorine and bind Pt to the surface of the zeolite by steaming, 4) reduces the catalyst in hydrogen, and 5) optionally, resulfides the catalyst. The zeolite may be a MFI zeolite. The catalyst may be bound with an inert material which does not act as a binding site for platinum during the regeneration process, for example, silica.