Patent classifications
C
CHEMISTRY; METALLURGY
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C01
INORGANIC CHEMISTRY
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C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
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C01F7/02
Aluminium oxide; Aluminium hydroxide; Aluminates
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C01F7/04
Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
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C01F7/06
by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
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C01F7/0646
Separation of the insoluble residue, e.g. of red mud
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C01F7/0646

Use of calcium fluoride in the bayer process
12371337 · 2025-07-29 · ·

A Bayer process includes contacting bauxite and calcium fluoride with sodium hydroxide and forming a slurry, with the calcium fluoride may provide at least 1 wt. % of the calcium added to the process, and precipitating alumina from the slurry.

Use of calcium fluoride in the bayer process
12371337 · 2025-07-29 · ·

A Bayer process includes contacting bauxite and calcium fluoride with sodium hydroxide and forming a slurry, with the calcium fluoride may provide at least 1 wt. % of the calcium added to the process, and precipitating alumina from the slurry.