US Patent 7163570 Chromatographic method of separating ruthenium from platinum group metals

Patent 7163570 was granted and assigned to Anglo American Platinum on January, 2007 by the United States Patent and Trademark Office.

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Current Assignee

Anglo American Platinum

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

71635700

Patent Inventor Names

Richard Alasdair Grant0

Date of Patent

January 16, 2007

Patent Application Number

104157050

Date Filed

October 26, 2001

Patent Primary Examiner

Roy King

Patent abstract

A chromatographic separation method separates ruthenium from other platinum group metals in a feed solution, by converting the Ru to a nitrosyl complex, retaining the nitrosyl complex temporarily on the chromatography column and subsequently eluting Ru, for example using an oxidising or reducing eluent. FIG. 1 shows the elution profile obtained from a mixture of Rh chloro-complexes (Peak 1) and Ru nitrosyl species (Peak 2).

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