B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01D—SEPARATION
B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
B01D53/34—Chemical or biological purification of waste gases
B01D53/46—Removing components of defined structure
B01D53/68—Halogens or halogen compounds
C—CHEMISTRY; METALLURGY
C01—INORGANIC CHEMISTRY
C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
C01B7/00—Halogens; Halogen acids
C01B7/19—Fluorine; Hydrogen fluoride
C01B7/191—Hydrogen fluoride
C—CHEMISTRY; METALLURGY
C01—INORGANIC CHEMISTRY
C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
C01F7/00—Compounds of aluminium
C01F7/48—Halides, with or without other cations besides aluminium
C01F7/50—Fluorides
C01F7/54—Double compounds containing both aluminium and alkali metals or alkaline-earth metals
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Verfahren zur Gewinnung von reinem Aluminiumoxyd mittels Salzsäure-Lixiviation von Aluminium enthaltenden Mineralien und Extraktion der Verunreinigungen mittels einer Behandlung mit Schwefelsäure
Continuous process for obtaining pure alumina from an acidic liquor originating from the chlorosulphuric attack of an aluminous ore and for the purification of the liquor which has been freed from alumina