Patent ID: 6228338
Filing Date: 2001-05-08
Classification: C01B,C06B,H01M,Y02E

Abstract:
A method for preparing .alpha.-AlH.sub.3, comprising the steps of:(a) reacting an alkali metal hydride with AlCl.sub.3 in a solution of diethyl ether to form an initial AlH.sub.3 product in a reaction mixture, along with an alkali metal chloride;(b) removing the alkali metal chloride from the reaction mixture by filtration;(c) adding an excess of toluene to the filtrate resulting from step (b), providing a diethyl ether-toluene solution;(d) heating and distilling the diethyl ether-toluene solution to reduce the amount of diethyl ether in the solution, until a precipitate is formed;(e) isolating the precipitate; and(f) adding the precipitate to an acidic solution effective to dissolve and thus remove materials other than .alpha.-AlH.sub.3.