Method for synthesizing aluminum hydride

US5670129A · kind A · utility

Assignee

• Th. Goldschmidt. AG · DE

Inventors

• Astrid Klapdor · Essen, DE
• Wilfried Knott · Essen, DE
• Dagmar Windbiel · Essen, DE

Key dates

• Filing date: Nov 29, 1995
• Grant date: Sep 23, 1997
• Expiry date: Nov 29, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B6/06
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a method for the preparation of toluene solutions of aluminum hydride, which is free of ethers and halides, characterized in that the complex, bound magnesium halide portion is precipitated and removed from halogen magnesium aluminum hydridohalides, which optionally are present in tetrahydrofuran (THF) solutions, of the general formula EQU (Mg.sub.2 X.sub.3 (THF).sub.y).sup.+ (AlH.sub.3 X).sup.- wherein PA1 X is chlorine, bromine or iodine PA1 Y is a number from 0 to 6, by the consecutive addition of hexane and toluene with successive removal by distillation of hexane and optionally of THF at boiling temperatures up to 90.degree. C. Solutions of aluminum hydride in toluene are obtained, which can be used directly for reductions or yield solid aluminum hydride after removal of the solvent.