Process for preparing crystalline microporous and mesoporous metal silicates, products obtainable by said process and their use

US6710193B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Steffen Hasenzahl · Hanau, DE
• Helmut Mangold · Rodenbach, DE
• Eckehart Roland · Bruchköbel, DE
• Mario Scholz · Zöblitz, DE
• Georg Thiele · Hanau, DE

Key dates

• Filing date: Aug 17, 2001
• Grant date: Mar 23, 2004
• Expiry date: Aug 17, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S423/29
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Microporous and mesoporous metal silicates are prepared by the hydrothermal reaction of a silicon and metal source in the presence of a template. The choice of raw materials influences the purity and hence the catalytic activity of the products. A pyrogenic mixed oxide is used as the silicon and metal source. Prepared products have the composition (SiO2)1-x(AmOn)x, where A is Ti, Al, B, V or Zr and x is 0.005 to 0.1. Shaped objects of the microporous and mesoporous metal silicates are obtained directly by using a shaped object of the pyrogenic mixed oxide. The products obtained are used as oxidation catalysts.