Catalysts based on crystalline aluminosilicate

US7229941B2 · kind B2 · utility

Assignee

• Sud Chemie, Inc. · US

Inventors

• Gotz Burgfels · Bad Aibling, DE
• Karl Kochloefl · Bad Aibling, DE
• Jurgen Ladebeck · Bad Aibling, DE
• Michael Schneider · Santa Monica, US
• Friedrich Schmidt · Wuppertal, DE
• Hans J. Wernicke · Geretsried, DE
• Josef Schönlinner · Obing, DE

Key dates

• Filing date: Dec 1, 2003
• Grant date: Jun 12, 2007
• Expiry date: May 5, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A catalyst is described based on crystalline aluminosilicates of the pentasil type, characterized in that it is constructed from primary crystallites with an average diameter of at least 0.01 μm and less than 0.1 μm, that are combined to at least 20% to agglomerates of 5 to 500 μm, in which the primary crystallites or agglomerates are bonded together by finely divided aluminum oxide, that its BET surface is 300 to 600 m2/g and its pore volume (determined according to mercury porosimetry) is 0.3 to 0.8 cm3/g, that it is present in H form and that the amount of finely divided aluminum oxide binder is 10 to 40 wt. %, referred to the total weight of the aluminosilicate, in which the finely divided aluminum oxide binder is used in the reaction charge as peptizable aluminum oxide hydrate, sodium aluminate being used as aluminum and alkali source, and primary synthesis of the crystalline aluminosilicate occurs without addition of acid. A method is also described for production of such a catalyst and its preferred applications.