Alumina compositions

Details Alumina compositions Alumina compositions

1981-02-19

1983-02-01

Carter, Herbert T.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423626, 423628, 252463, C01F 702

Patent

active

043715133

ABSTRACT:
An alumina composition comprising a microcrystalline boehmite-pseudoboehmite intermediate having from about 70 to about 85 weight percent of the total amount of Al.sub.2 O.sub.3 present in crystalline form. The composition is prepared by adding aluminum sulfate and sodium aluminate solutions to a mixture of water and aluminum sulfate solution to precipitate alumina and adjusting the pH to a pH higher than the precipitation pH. The reactant concentrations, and rates of addition, temperatures, and pH's in the precipitation are specifically controlled to form the boehmite-pseudoboehmite intermediate.

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patent: 3193349 (1965-07-01), Mooi
patent: 3429660 (1969-02-01), Keith et al.
patent: 3520654 (1970-07-01), Carr et al.
patent: 3558508 (1971-01-01), Keith et al.
patent: 3579468 (1971-11-01), Wright
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patent: 3879310 (1975-04-01), Rigge et al.
patent: 3919403 (1975-11-01), Pullen et al.
patent: 4081353 (1978-03-01), Kekl et al.
patent: 4085068 (1978-04-01), Gallagher et al.
patent: 4120943 (1978-10-01), Iwaisako et al.
Popowicz et al., "Przemysl Chemiczny", vol. 51, 1972, pp. 607-609.

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