Recovery of alumina from siliceous minerals

Details Recovery of alumina from siliceous minerals Recovery of alumina from siliceous minerals

1978-09-27

1979-06-12

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423132, 423481, C01F 720

Patent

active

041580427

ABSTRACT:
A process for the production of alumina from siliceous minerals containing substantial quantities of combined aluminium and calcium comprises the steps of treating the finely divided mineral with a hot acid liquor containing chloride, fluoride and calcium ions to extract alumina values from the mineral; recovering aluminium chloride from the liquid extract; recycling one fraction of the spent extract to the mineral extraction stage; and treating another fraction of the spent extract to regenerate hydrogen chloride gas for re-use in the process.

REFERENCES:
patent: 1310413 (1919-07-01), Eberhardt
patent: 1403061 (1922-01-01), Sieurin
patent: 1777570 (1930-10-01), Masin
patent: 1868499 (1932-07-01), Muertler
patent: 3816605 (1974-06-01), Belsky
patent: 4056146 (1977-11-01), Hall

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