Method for producing alkaline earth metal oxides

US7749483B2 · kind B2 · utility

Assignee

• HONEYWELL INTERNATIONAL INC. · US

Inventors

• Thomas Scholten · Tuttlingen, DE
• Michael Fooken · Seelze, DE
• Jessica Mauer · Wunstorf, DE
• Andreas Kanschik-Conradsen · Garbsen, DE
• Michael Hau · Shoreview, US

Key dates

• Filing date: Dec 15, 2006
• Grant date: Jul 6, 2010
• Expiry date: Nov 24, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/82
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Disclosed is a processes for the production of relatively high purity alkaline earth metal oxides, such as SrO, from relatively low purity forms of carbonated or other oxygenated forms of such metals, such as strontium carbonate. The relatively low purity material is exposed to conditions under which at least a portion of the metal contained therein is converted to a salt that is more readily solvated in a provided solvent than the starting material, while at the same time not substantially increasing the solubility of at least one or more of the impurities in such selected solvent. This step is then preferably followed by removal of solid or otherwise un-dissolved impurities from the solution. After the removal step, the solution is preferably exposed to conditions effective to form a relatively insoluble salt of the alkaline earth metal, such as a strontium salt. The insoluble salt is also preferably one that can be readily and effectively converted to the desired alkaline earth metal oxide, preferably SrO. A novel preferred thermal decomposition step disclosed.