Process for the production of boehmitic aluminas

Details Process for the production of boehmitic aluminas Process for the production of boehmitic aluminas

1989-06-02

1991-10-08

Lewis, Michael L.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423628, C01F 702

Patent

active

050550195

ABSTRACT:
A process for the preparation of boehmitic alumina compounds having a purity of, at least, 99.95% Al.sub.2 O.sub.3. The compounds produced according to the invention have a pore radii in the range of 3 to 100 nm. The preparation of such compounds is carried out by, first, obtaining an alumina suspension from a neutral aluminum alkoxide hydrolysis and, then, aging the alumina suspension in an autoclave, preferably, at a steam pressure of 1 to 30 bar, corresponding to a temperature of 100.degree. C. to 235.degree. C., for between 0.5 and 20 hours. The aging step of the invention is preferably carried out with stirring at a peripheral speed of 1 to 6 m/s.

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