Preparation of crystalline microporous and mesoporous metal silicates, products produced thereby and use thereof

US5919430A · kind A · 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: Jun 19, 1997
• Grant date: Jul 6, 1999
• Expiry date: Jun 19, 2017

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 (SiO.sub.2).sub.1-x (A.sub.m O.sub.n).sub.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.