Preparation of a suspension in preparation of powder making

US4824600A · kind A · utility

Assignee

• Dornier System GmbH

Inventors

• Wulf Kock · Alzenau, DE
• Wolfgang Wagner · Preetz, DE

Key dates

• Filing date: Jun 26, 1987
• Grant date: Apr 25, 1989
• Expiry date: Jun 26, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C1/1026
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A highly concentrated silver salt suspension and tin salt suspension from which a silver and tin oxide powder can be made under utilization of the reaction spray method is made by adding in small steps a tin II salt solution into a small volume of concentrated nitric acid while maintaining a temperature below 40 degrees C. to obtain an injection suspension of a tin II salt solution, the injection suspension is then mixed with about a three fold quantity (volume) of concentrated 65% nitric acid, the latter mixture is then added in small steps to a watery citrate solution and combined with tin granules until all tin granules are dissolved and changed into a tin IV oxide hydrate suspension; the completed tin IV oxide hydrate suspension as per the preceding step is mixed with a watery silver nitrate solution.