Process for digesting goethite-containing bauxites according to

Details Process for digesting goethite-containing bauxites according to Process for digesting goethite-containing bauxites according to

1975-12-23

1978-05-23

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423131, C01F 706

Patent

active

040910717

ABSTRACT:
The invention relates to an improved process for the production of alumina according to the Bayer technology, of bauxites containing goethite and especially of boehmitic or diasporic bauxites, for the acceleration of the digestion process, for the transformation of goethite into hematite, for the increase of alumina yield and for the reduction of the caustic soda losses, the essence of which consists in carrying out the digestion in the presence of 2-6% CaO and 0.2-2.0% Mg.sup.++, Fe.sup.++, Mn.sup.++ Co.sup.++ ions based on the weight of the dry bauxite or of compounds or ores containing these ions in the indicated quantities.

REFERENCES:
patent: 2519362 (1950-08-01), Flint et al.
patent: 2557891 (1951-06-01), Porter
patent: 2926069 (1960-02-01), Perrin et al.
patent: 3399958 (1968-09-01), Brown
patent: 3737514 (1973-06-01), King
patent: 3944648 (1976-03-01), Solymar et al.
patent: 4026989 (1977-05-01), Orban et al.

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