Chemistry of inorganic compounds – Hydrogen or compound thereof – Binary compound
Patent
1994-10-27
1996-10-15
Langel, Wayne
Chemistry of inorganic compounds
Hydrogen or compound thereof
Binary compound
423647, C01B 600, C01B 604
Patent
active
055651836
ABSTRACT:
A method for the preparation of aluminum hydride (AlH.sub.3) by the reaction of magnesium hydride with aluminum halide in presence of solvents is utilized with the distinguishing feature that the magnesium hydride is obtained by the reaction of magnesium with hydrogen at a temperature of at least 250.degree. C. and a pressure of 0.5 to 5 MPa with the proviso that, before the hydrogenation, magnesium hydride with a particle size not greater than 400 .mu.m is added before the hydrogenation in amounts of at least 1.2% by weight, based on the magnesium to be hydrogenated, to the magnesium that is to be hydrogenated, and the reaction between magnesium hydride and aluminum halide is carried out at a temperature ranging from 20.degree. to 110.degree. C. for a period of 30 minutes to 5 hours while constantly grinding the reactants, MgH.sub.2 and AlX.sub.3 (X being halogen), in the molar ratio of at least 3:2 in 1,4 dioxane.
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Ullmann's Encyclopedia, Hydrides, pp. 213-214.
Langel Wayne
Th. Goldschmidt Ag
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