OXYGEN-CONTAINING ALUMINUM COMPOUND AND METHOD OF PREPARATION THEREOF Russian patent published in 2000 - IPC

FIELD: industrial inorganic synthesis. SUBSTANCE: invention relates to production of different modifications of aluminum oxide and aluminum hydroxide used as fillers and absorbents and also as starting material for production of aluminum salts, etc. According to invention, oxygen-containing aluminum compound of general formula Al₂O₃•nH₂O prepared by rapid partial dehydration of aluminum hydroxide and containing Al(III) cations in 4,5,6-coordination state with respect to oxygen additionally contains at least one compound of element selected from group including: Na, K, Si, B, C, Ti, Zr, Ba, Ca, Mg, Ga, Sn, and La in amounts 0.01 to 2.0 wt.% (on conversion to oxides) with value of n = 0.03 to 2.0 and having specific surface from 50 to 450 sq.m/g. The obtained oxygen-containing compound has amorphous or poorly crystallized structure or partially crystalline structure. Method of preparing such compound involves rapid partial high-temperature (300- 1200 C) dehydration of aluminum oxide additionally containing at least one compound of the above-listed elements followed by hardening at temperature no higher than 280 C to form final compound with formula Al₂O₃•nH₂O wherein n=0.3-2.0. EFFECT: enabled preparation of aluminum compound with a variety of physico-chemical properties including catalysts for a series of processes. 4 cl, 1 tbl, 16 ex