Patent · US Expired

Production of bauxite and aluminium chloride of low iron content

US4059673A · kind A · utility

1Cited by

10References

8Claims

0Family size

Assignee

Comalco Limited · AU

Inventors

Robin Holliday · Parramatta, AU
David Milne · Melbourne, AU

Key dates

Filing date	Apr 10, 1975
Grant date	Nov 22, 1977
Priority date	—
Expiry date	Apr 10, 1995

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01F7/60
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Removal of iron from aluminous material such as bauxite is effected by treatment with a gas mixture comprising sulphur dioxide and carbon monoxide in a first step, followed by chlorination in a second step whereby ferric chloride is produced and removed by volatilization. Aluminium chloride of low iron content may be obtained from the purified aluminous material by chlorination.

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