Patent · US Expired

Method of precipitation of pure aluminiumchloride from solutions which contain ions of aluminium and magnesium

US4297327A · kind A · utility

3Cited by

7References

4Claims

0Family size

Assignee

Elkem-Spigerverket a/s · NO

Inventors

Norvald Gjelsvik · Oslo, NO
Gunnar Hannestad · Lillestrøm, NO
Ingleif Hundere · Frogner, NO
Jan Torgersen · Lillestrøm, NO

Key dates

Filing date	Feb 4, 1980
Grant date	Oct 27, 1981
Priority date	—
Expiry date	Feb 4, 2000

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01F7/62
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Method of producing aluminiumchloride with a low content of magnesium from hydrochloric acid solutions which contain ions of aluminium and magnesium and from which the aluminiumchloride is precipitated by hydrochloric gas and where the precipitation is carried out continuously in cascade so that the major part of the aluminium will be precipitated from solutions in which the ratio between aluminium and magnesium calculated as g Al.sup.+3 /g Mg.sup.+2 is above 0,5. Produced aluminiumchloride may be transformed to aluminiumoxide by calcination.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.