Method of activation of red mud

Details Method of activation of red mud Method of activation of red mud

1972-11-10

1977-04-12

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252455R, B01J 3702, B01J 2906

Patent

active

040174255

ABSTRACT:
A method for activating the red mud formed in the Bayer alumina producing process for allowing its use as adsorbent, catalyst, ion-exchanging substance and clarifying substance, comprising a digesting red mud and dispersing the metal oxide compound particles in the compound of metal hydroxides and silica gel. The method comprises digesting red mud with acid, before adjusting the pH of the acid digested mixture comprising the sludge product to above 4 to disperse oxide compound in the compound the metal hydroxides and silica gel, and removing the residue acid employed from the gelating product with washing, then with or without shaping treating, and heat treating the product to provide a active red mud, particularly with respect to the catalytic cracking, decolorization of hydrocarbon, clarification of waste gas and adsorption processes.

REFERENCES:
patent: 2769688 (1956-11-01), Milliken, Jr. et al.
patent: 3112279 (1963-11-01), Papee et al.
patent: 3311449 (1967-03-01), Atsukawa et al.

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