Process for producing anhydrous MgCl.sub.2

US6042794A · kind A · utility

Assignee

• NORSK HYDRO ASA · NO

Inventors

• Ketil Amundsen · Oslo, NO
• Hans Ragnar Eklund
• Ralf Schmidt · Berlin, DE

Key dates

• Filing date: Jan 15, 1999
• Grant date: Mar 28, 2000
• Expiry date: Jan 15, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2002/72
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for producing anhydrous magnesium chloride comprising steps of selective calcination of Mg-containing minerals, selective leaching of magnesium, separation of insoluble impurities, precipitation of magnesium chloride hexammoniate and thermal decomposition of the magnesium chloride hexammoniate crystals into magnesium chloride and ammonia.