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Priority to AT181860ApriorityCriticalpatent/AT219012B/en
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Publication of AT219012BpublicationCriticalpatent/AT219012B/en
Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals
(AREA)
Description
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Verfahren zur Herstellung von Kryolith
EMI1.1
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Wird die Ammonfluoridlösung innerhalb einer Stunde langsam zugesetzt, so enthält der Kryolith 0, 9% SO3 in nicht auswaschbarer Form.
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Process for making cryolite
EMI1.1
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If the ammonium fluoride solution is added slowly within an hour, the cryolite contains 0.9% SO3 in a form that cannot be washed out.
Claims (1)
PATENTANSPRUCH :
EMI2.1
als 50 g/l H2S04 entspricht, durchgeführt wird, dass weiters stets mindestens 3 Mole Fluor auf l Mol Aluminium kommen und die Fällung möglichst rasch, vorzugsweise innerhalb etwa einer Minute, höchstens aber innerhalb etwa 5 Minuten, durchgeführt wird.
PATENT CLAIM:
EMI2.1
than 50 g / l H2S04, it is carried out that there are always at least 3 moles of fluorine per 1 mole of aluminum and the precipitation is carried out as quickly as possible, preferably within about one minute, but at most within about 5 minutes.
AT181860A1959-05-151959-05-15
Process for making cryolite
AT219012B
(en)