Process for the production of finely divided silicic acid by spray drying

US4224295A · kind A · utility

Assignee

• Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler

Inventors

• Bernd Brandt
• Peter Nauroth · Wesseling, DE
• Albert Peters · Lechenich, DE
• Helmut Reinhardt

Key dates

• Filing date: Jun 15, 1978
• Grant date: Sep 23, 1980
• Expiry date: Jun 15, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/90
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A finely divided silicic acid having a pH>6 is prepared by spray drying, in the presence of a base or basic-reacting substance, a highly concentrated silicic acid suspension having excess, unwanted acidity.