Heraeus Deutschland Gmbh & Co Kg

Heraeus Precious Metals Gmbh & Co. Kg

Hermann Von Eiff

Horst Meyer

Matthias Grehl

Martin Stettner

Vasco Thiel

Christoph Röhlich

Joachim Kralik

Hans-Joachim Alt

Jan Schapp

Peter Patzelt

Marco Stemmler

Steffen Voß

Christian Kraushaar

Jan Roder

Jan RÖDER

Bernd Zell

Process for the production of particulate ruthenium with a purity of &#x2264;99.99 wt. % and a specific surface area of 0.2-0.5 m/g, comprising: (1) providing a hydrochloric solution prepared by dissolving RuOin hydrochloric acid and has a content of ruthenium in the form of dissolved ruthenium species of 15-22 wt. %; (2) providing an aqueous solution with an ammonium chloride content of 200-600 g/litre; (3) forming a reaction mixture by dosing the hydrochloric solution provided in step (1) to the aqueous solution provided in step (2) at a molar ratio of 1 mol ruthenium: 3-6 mol ammonium chloride, at a temperature of 55-90&#xb0; C. over the course of 0.2-5 hours and while adjusting and maintaining a pH of &#x2212;0.6 to 0; (4) separating solid material formed during step (3) from the hydrochloric reaction mixture; and (5) calcinating the solid material separated in step (4) at an object temperature of 350-1,000&#xb0; C.

Process for production of particulate ruthenium

A method for producing highly pure platinum on an industrial scale, as well as the use of said highly pure platinum. According to the method, a hexahalogenoplatinate is reduced to platinum in acidic conditions.

Method for producing highly pure platinum powder, as well as platinum powder that can be obtained according to said method, and use thereof

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Neuberg, Germany

Hermann Von Eiff