Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group iiia metal or beryllium
Patent
1987-05-04
1989-07-18
Stoll, Robert L.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group iiia metal or beryllium
423127, 423629, 423DIG1, 210724, C01F 702
Patent
active
048491900
ABSTRACT:
Process for the production of hydrated aluminae through the precipitation of aluminum hydroxide in a reactor by the reaction of an aluminum compound soluble in a polar solvent with a precipitating agent, also solubilized in the polar solvent, in constant conditions of pH, temperature, concentration and agitation; concentration of the suspension of precipitated aluminum hydroxide; crystallization in an alkaline pH, essentially constant; separation of the crystallized aluminum hydroxide, for later washing and drying. The product obtained is homogeneous and with excellent characteristics for utilization in the manufacturing of catalysts and catalytic supports. The process can be applied, advantageously, in the treatment of the acid waste from processes which utilize Friedel-Crafts type reactions, obtaining, in addition to the hydrated alumina, a liquid effluent with low metal contents.
REFERENCES:
patent: 328478 (1885-10-01), Freist
patent: 1732772 (1929-10-01), Rinman
patent: 1951443 (1934-03-01), Sanders
patent: 2659660 (1953-11-01), Sable 423123
Oxides and Hydroxides of Aluminum, Karl Wefers, Chanakya Misra, Alcoa Laboratories, 1987.
da Fonseca Marcus C.
de Castro Morshbacker Antonio L. R.
de Mello Ricardo T.
Filho Dante F. F.
Filho Joaquim M. F.
Harvey Paige C.
Petroflex, Industria E Comercio S.A.
Stoll Robert L.
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