METHOD FOR BOEHMITE AND HYDROGEN PREPARATION Russian patent published in 2009 - IPC C01F7/42 C01B3/10 

FIELD: chemistry.

SUBSTANCE: invention refers to the field of inorganic synthesis and can be used at preparation of hydrogen and crystalline aluminium hydroxide in the form of boehmite which can be used in different branches of industry. The method involves the suspending of pulverised aluminium in water with adding of no more than 0.1 M of catalyst - alkali metal hydroxide. The reactor is pressurised with saturated water vapours, the obtained aluminium suspension is sprayed to the high-pressure reactor. After that but before boehmite removal from the reactor the suspension is allowed for implementing of aluminium complete oxidation and boehmite crystallisation Then the mixture of water vapours and hydrogen is removed from the reactor and boehmite is unloaded to the receiver For providing of process continuity at least one additional reactor is used; during suspension spraying in one of reactors at least in one of the others the aluminium oxidation is completed and crystallisation and withdrawal of boehmite are carried out.

EFFECT: invention allows obtaining of chemically pure crystalline boehmite

2 cl, 3 dwg, 4 tbl

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