Method for the treatment of phosphate rock

US4181703A · kind A · utility

Assignee

• UHDE GMBH · DE

Inventors

• Wilhelm Wengeler · Bochum, DE
• Friedrich Wolstein · Essen, DE
• Egbert Hoffmann · Bochum, DE

Key dates

• Filing date: Nov 18, 1977
• Grant date: Jan 1, 1980
• Expiry date: Nov 18, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B25/01
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The method for the treatment of phosphate rock that has a content of magnesium compounds in excess of 0.3%. The crushed and screened phosphate rock is mixed with water in a ratio of 1:5 by weight. The mixture is acidified with sulphuric acid, and the reaction mixture is filtered and washed before the neutralization point is reached.