by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process (obtaining aluminium oxide or hydroxide from the resulting aluminate solution C01F7/14)

Full Title

Compounds of aluminium > Aluminium oxide; Aluminium hydroxide; Aluminates > Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom (C01F7/028 takes precedence) > by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process (obtaining aluminium oxide or hydroxide from the resulting aluminate solution C01F7/14)

Child Classifications

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• C01F 7/0606 Making-up the alkali hydroxide solution from recycled spent liquor
• C01F 7/0613 Pretreatment of the minerals, e.g. grinding
• C01F 7/062 Digestion
• C01F 7/0646 Separation of the insoluble residue, e.g. of red mud
• C01F 7/066 Treatment of the separated residue
• C01F 7/0666 Process control or regulation
• C01F 7/0673 from phosphate-containing minerals
• C01F 7/068 from carbonate-containing minerals, e.g. dawsonite
• C01F 7/0686 from sulfate-containing minerals, e.g. alunite
• C01F 7/0693 from waste-like raw materials, e.g. fly ash or Bayer calcination dust