Method of producing spherical particles

US5736118A · kind A · utility

Assignee

• Solvay Deutschland GmbH · DE

Inventors

• Helmut Derleth · Nienburg, DE
• Karl-Heinz Bretz · Nienburg, DE

Key dates

• Filing date: Sep 5, 1995
• Grant date: Apr 7, 1998
• Expiry date: Sep 5, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S210/909
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method of producing spherical particles made from inorganic oxides by sol/gel conversion in which a sol is sprayed upwards from below into a reaction zone containing a reactant gas in such a way that the sol does not split up into individual droplets until immediately before or as it enters the reaction zone, and the resulting droplets fly through the reaction zone along a curved trajectory during which they are presolidified, the presolidified droplets being caught in a trap. Also described are spherical particles made from inorganic oxides with a narrow pore diameter distribution and a high resistance to wear which are suitable for use as catalysts, catalyst supports, adsorbents drying agents or ion exchange materials.