FIELD: chemical technology, inorganic chemistry. SUBSTANCE: transient aluminium oxide and/or aluminium oxide raw capable to be converted to transient aluminium oxide at heating is calcined at 600-1 200 C in atmosphere containing at least 1% (by volume) hydrogen chloride, or at least 1% (by volume) chlorine, or at least 0.1% (by volume) steam. EFFECT: improved method of producing. 8 cl, 8 dwg , 4 tbl
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