Process for producing yellow copper (I) oxide with narrow particle size range

US5409686A · kind A · utility

Assignee

• Norddeutsche Affinerie Aktiengesellschaft

Inventors

• Gerd Mrusek · Buxtehude, DE
• Hermann Winkler · Recklinghausen, DE
• Michael Stelter · Chemnitz, DE
• Klaus P. Hugk · Hamburg, DE

Key dates

• Filing date: Dec 19, 1991
• Grant date: Apr 25, 1995
• Expiry date: Dec 19, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/60
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

In a process of producing copper(I) oxide by the action of an aqueous solution of a mineral acid and of oxygen-containing gas on small-lump copper metal with continuous agitation, a temperature from 10.degree. to 40.degree. C., preferably from 15.degree. to 35.degree. C., is maintained to effect a formation of particulate yellow copper(I) oxide (Cu.sub.2 O). An organic acid of the group consisting of formic acid, acetic acid, ascorbic acid, preferably ascorbic acid, may be used in addition to the mineral acid.