LITHIUM GAMMA-ALUMINATE, METHOD OF PREPARATION THEREOF, AND LITHIUM PREPARATION METHOD Russian patent published in 2006 - IPC C01F7/04 C22B26/12 

FIELD: inorganic compounds technology.

SUBSTANCE: invention relates to preparing novel inorganic compound, in particular lithium γ-aluminate Li_1+xAl_1-xO_2-x, where 0.01 ≤ x ≤ 0.75, which can be used as dielectric material in production chemical power sources, lithium, etc. as well as to lithium production process using proposed lithium γ-aluminate. Lithium carbonate and aluminum hydroxide are taken at molar ratio (33.8-77.8):(22.2-66.2), thoroughly mixed, and resulting mixture is placed into platinum crucible and gradually heated in furnace under air atmosphere to 500-1100°C using intermediate grinding and ageing for 3 h after each 50°C temperature raise. Based on X-ray structure-measured and chemical composition data, single-phase lithium γ-aluminate Li_1+xAl_1-xO_2-x, where 0.01 ≤ x ≤ 0.75, with tetragonal structure is obtained. Lithium preparation comprises mixing resulting lithium γ-aluminate with aluminum powder at weight ratio (65-70):(30-35), respectively, powering mixture into crucible, placing the latter into vacuum oven, which is evacuated to 0.7-0.8 Pa, heated to 700-1200°C at heating rate 45-55°C/min, kept at this temperature for 4-5 h. and cooled. Thus obtained solid lithium condensate is then melted and powered out into metal receiver.

EFFECT: extended choice of aluminate compounds and expanded lithium metal preparation possibilities.

3 cl, 6 ex