Process for the production of active aluminum oxide in bead and

Details Process for the production of active aluminum oxide in bead and Process for the production of active aluminum oxide in bead and

1973-10-17

1976-05-25

Camby, John J.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 10, 34 57E, 423628, F26B 700

Patent

active

039583414

ABSTRACT:
Highly active aluminum oxide characterized by a severely disturbed crystalline structure of .chi.-(chi-)aluminum oxide, a specific surface area of about 260 to 400 m.sup.2 /g according to BET, a residual water content of 2 to 10 % and a water absorption capacity at 50 % relative atmospheric humidity of more than 15 %, and process of producing same by heating aluminum hydroxide to a temperature of 350.degree. to 800.degree.C with a residence time of from 0.1 to 2 seconds in a zone of high turbulence in a hot gas which enters said zone at a temperature of about 500.degree. to 1200.degree.C at an inflow rate of 30 to 150 m/second. These highly active aluminum oxide may be formed into beads by grinding said aluminum oxide to a specified particle size and forming the aluminum oxide under addition of water.

REFERENCES:
patent: 2915365 (1959-12-01), Saussol
patent: 3020646 (1962-02-01), Joseph et al.
patent: 3021195 (1962-02-01), Podschus et al.
patent: 3222129 (1965-12-01), Osment et al.
patent: 3226191 (1965-12-01), Osment et al.
patent: 3623993 (1971-11-01), Pearson
patent: 3701718 (1972-10-01), Papee et al.
Newsome et al., "Alumina Properties," Technical Paper No. 10, 2nd Revision, 1960, pp. 39-45.

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