Method for regenerating a zeolitic catalyst

US6710002B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Georg Heinrich Grosch · Bad Dürkheim, DE
• Ulrich Mueller · Hamburg, DE
• Andreas Walch · Heidelberg, DE
• Norbert Rieber · Mannheim, DE
• Wolfgang Harder · Weinheim, DE

Key dates

• Filing date: Feb 4, 2002
• Grant date: Mar 23, 2004
• Expiry date: Mar 21, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/584
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for regenerating a zeolite catalyst comprises the following stages:(I) Heating a partially or completely deactivated catalyst to 250-600° C. in an atmosphere which contains less than 2% by volume of oxygen,(II) treating the catalyst at from 250 to 800° C., preferably from 350 to 600° C., with a gas stream which contains from 0.1 to 4% by volume of an oxygen-donating substance or of oxygen or of a mixture of two or more thereof, and(III) treating the catalyst at from 250 to 800° C., preferably from 350 to 600° C., with a gas stream which contains from more than 4 to 100% by volume of an oxygen-donating substance or of oxygen or of a mixture of two or more thereof.