Method for the separation of precipitated aluminum hydroxide fro

Details Method for the separation of precipitated aluminum hydroxide fro Method for the separation of precipitated aluminum hydroxide fro

1979-05-08

1980-05-06

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423119, 423121, 423130, 423630, 23301, 23305A, C01F 714

Patent

active

042017491

ABSTRACT:
In the production of alumina from aluminous ores by the Bayer process, the present invention provides an improvement for effectively and economically recovering caustic components consisting essentially of sodium aluminate from aluminum hydroxide cakes as seed classified from the product aluminum hydroxide by washing the seed with a washing liquor having a substantially saturated concentration of sodium oxalate and little content of caustic and then removing organic substances such as sodium oxalate from the washed seed by secondly washing said seed with hot water, thereby recovering caustic components without the dissolution of sodium oxalate from the seed into the recovered caustic solution and attaining the removal of sodium oxalate contaminant with high efficiency.

REFERENCES:
patent: 2707669 (1955-05-01), Houston et al.
patent: 2935376 (1960-05-01), Roberts
patent: 3372985 (1968-03-01), Roberts et al.
patent: 3486850 (1969-12-01), Day
patent: 3649185 (1972-03-01), Sato et al.
patent: 3838980 (1974-10-01), Gnyra
patent: 4038039 (1977-07-01), Carnitheas et al.

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