Patent · US Expired

Method for removing organic substances from caustic aluminate liquors

US4668486A · kind A · utility

7Cited by

6References

15Claims

0Family size

Assignee

Vereinigte Aluminum - Werke Aktiengesellschaft · DE

Inventors

Neil Brown · Bergheim, DE
Gerhard Kudermann · Bornheim, DE
Manfred Fuchs · Nuremberg, DE

Key dates

Filing date	Apr 3, 1986
Grant date	May 26, 1987
Priority date	—
Expiry date	Apr 3, 2006

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01F7/476
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The present invention is directed to a method for removing organic substances from aluminate liquors of the Bayer process. The method comprises the steps of contacting the liquor with an oxygen containing gas under elevated pressure in the presence of metallic ions acting as a catalyst to oxidize the organic substances, precipitating the metallic ions jointly with aluminum hydroxide, separating the precipitate from the oxidized liquor and recycling the precipitated aluminum hydroxide containing the metallic ions into the oxidation step as a catalyst carrier.

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