Hall–Héroult process
E582418
The Hall–Héroult process is the primary industrial method for producing aluminum by electrolytically reducing alumina dissolved in molten cryolite.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| Hall–Héroult aluminum smelting process | 1 |
Statements (53)
| Predicate | Object |
|---|---|
| instanceOf |
aluminium production process
ⓘ
electrolytic process ⓘ industrial process ⓘ |
| anodeMaterial | carbon ⓘ |
| anodeType | consumable anodes ⓘ |
| appliedInIndustry | aluminium smelters worldwide ⓘ |
| basedOn | electrolytic reduction of alumina ⓘ |
| byproductFormation | oxidation of carbon to carbon dioxide ⓘ |
| cathodeMaterial | carbon ⓘ |
| countryOfOrigin |
France
ⓘ
United States of America ⓘ
surface form:
United States
|
| developedBy |
Charles Martin Hall
NERFINISHED
ⓘ
Paul Héroult NERFINISHED ⓘ |
| discoveredIn | 1886 ⓘ |
| dominantSince | early 20th century ⓘ |
| electrolyteContains |
alumina
ⓘ
aluminium fluoride ⓘ calcium fluoride ⓘ cryolite ⓘ |
| energyIntensity | high specific electricity consumption ⓘ |
| environmentalIssue |
high greenhouse gas emissions
ⓘ
perfluorocarbon emissions during anode effects ⓘ |
| hasInput |
alumina (Al2O3)
ⓘ
carbon ⓘ cryolite (Na3AlF6) ⓘ |
| hasOutput |
aluminium
ⓘ
carbon dioxide ⓘ perfluorocarbon gases ⓘ spent pot lining ⓘ |
| industrialUseBeganIn | late 19th century ⓘ |
| mainlyUsedIn | primary aluminium production ⓘ |
| namedAfter |
Charles Martin Hall
NERFINISHED
ⓘ
Paul Héroult NERFINISHED ⓘ |
| operatesAt |
about 950 °C
ⓘ
high temperature ⓘ |
| patentedIn | 1886 ⓘ |
| reactionType | reduction of aluminium ions to aluminium metal ⓘ |
| replaced | earlier chemical reduction methods for aluminium ⓘ |
| requires |
continuous operation
ⓘ
large amounts of electricity ⓘ |
| usedFor | producing aluminium metal ⓘ |
| usesEquipment |
Hall–Héroult pot
NERFINISHED
ⓘ
busbar system ⓘ electrolytic cell ⓘ rectifier ⓘ |
| usesMethod |
direct current electrolysis
ⓘ
dissolution of alumina in cryolite ⓘ molten salt electrolysis ⓘ |
| usesSubstance |
alumina
ⓘ
carbon anodes ⓘ carbon cathode lining ⓘ electric current ⓘ molten cryolite ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.