Heraeus Deutschland Gmbh & Co Kg

W.c. Heraeus Gmbh & Co Kg

W.c. Heraeus Gmbh

Heraeus Precious Metals Gmbh & Co. Kg

Martin Stettner

Horst Meyer

Matthias Grehl

Stefanie Fuchs Alameda

Joachim Kralik

Vasco Thiel

Steffen Voss

Christian Nowottny

Jan Schapp

Hermann Von Eiff

Steffen Voß

Steffen Voβ

Christian Mock

Jochen Schleβmann

Magdalena Günther

Jochen Schlessmann

Magdalena GÜNTHER

Sophia Kröckel

A process for digestion of fine iridium includes (a) alkaline oxidative digestion of 1 part by weight fine iridium and 3 to 20 parts by weight of a combination comprising 40 to 70 parts by weight sodium hydroxide, 15 to 30 parts by weight sodium nitrate, and 10 to 40 parts by weight sodium peroxide in the melt, whereby the sum of the weight fractions equals 100 parts by weight; (b) cooling the digestion material formed in step (a) to 20 to 70&#xb0; C.; (c) dissolving the acid-soluble fractions of the cooled digestion material in water/halogen hydracid until an acidic aqueous solution with a pH value of &#x2212;1 to +1 is obtained; and (d) boiling the acidic aqueous solution obtained in step (c) until the formation of nitrous gases is completed. Insoluble ingredients can be separated from the acidic aqueous solution before or after step (d), if needed.

Process for digestion of a metallic iridium- and/or iridium oxide-comprising mixture of solid particles

Method for producing elemental rhodium, comprising the steps of:

Method for producing elemental rhodium

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

A method recovers noble metals from noble metal-containing compositions and includes steps of (i) providing a noble metal-containing composition containing an adsorption agent that is based on an inorganic material and is functionalized by organic groups and has at least one noble metal adsorbed to it, and (ii) ashing of the noble metal-containing composition provided in step (i) in order to adjust a residual carbon content of at most 10% by weight, relative to the total weight of the noble metal-containing composition after ashing, to obtain an ashed composition.

Process for recovery of noble metals from functionalised, noble metal-containing adsorption materials

For processing of noble metal-containing, moist recycling materials with an unknown noble metal content (hereinafter called 'batch'), a moisture-binding agent is added for homogenisation and the batch is mixed with comminution of optionally pre-sent agglomerates to form a free-flowing and homogenous powder. Optionally, the following takes place subsequently for analysis: a previously known or pre-calculated quantity of the moisture-binding agent being added before sampling (step A).

Method of homogenization and, optionally, analysis for processing moist noble metal-containing recycling materials with an unknown noble metal content

Processes for the recovery of ruthenium from materials containing ruthenium or ruthenium oxides or from ruthenium-containing noble metal ore concentrates, with the steps of Optionally, ruthenium is separated off by distillation, instead of precipitation, following step B, with the steps of

Processes for the recovery of ruthenium from materials containing ruthenium or ruthenium oxides or from ruthenium-containing noble metal ore concentrates

Method for dissolving noble metals out of segregated ores containing noble metals

Method for preparing gold of high purity

A method is described for the preparation of platinum wherein first an aqueous solution of a hexahalogenoplatinate is passed through a cation exchanger and then the solution obtained, at a temperature T>&plus;30&deg; C. and a pH of 0 to 4, is reduced by a reducing agent to precipitate in the form of a platinum sponge.

Method for producing platinum

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Altenstadt, Germany

Martin Stettner