Heraeus Deutschland Gmbh & Co Kg

W.c. Heraeus Gmbh

Heraeus Precious Metals Gmbh & Co. Kg

Heraeus Precious Metals North America LLC

Steffen Voss

Horst Meyer

Stefanie Fuchs Alameda

Richard Walter

Jan Schapp

Holger Winkler

Martin Stettner

Vasco Thiel

Christoph Röhlich

Felix Stoffner

Brian Peters

Jimmy Taylor

Kevin King

Stephen Jeffery

Jose Manuel Romero

Todd England

Dongshui Zeng

Christoph Roehlich

Stefanie Fuchs-Alameda

Norbert Ritschel

Magdalena Gunther

Processes produce catalytically highly effective noble metal carboxylate compounds or their solutions that comprise A) a noble metal carboxylate, wherein the noble metal is selected from the group consisting of ruthenium, platinum, palladium, rhodium and gold, and B) at least one compound selected from the group consisting of oxalic acid, a salt of oxalic acid, a derivative of oxalic acid and a salt of the derivative of oxalic acid. The process digests the noble metal with alkaline earth peroxide to produce a digestion mass and dissolves the digestion mass in a carboxylic acid or a carboxylic acid diluted with a protic solvent to produce a resulting solution, whereby alkaline earth ions are separated off as salt of an oxalic acid or salt of oxalic acid derivatives, and the processes do not include any BaSO4 precipitation and filtration of barium sulphate.

Catalytically highly effective precious metal-carboxylate compounds of Ir, Ru, Rh, Pd and Au

Process for removing inorganically&#x2014; and/or organically-bound carbon from a precious metal-containing composition inside an oven chamber comprising at least one direct burner and at least one exhaust gas conduit, characterised by the sequence of steps of: a) providing a precious metal-containing composition comprising fractions of inorganically&#x2014; and/or organically-bound carbon inside the oven chamber; b) closing the oven chamber; c) heating the content of the oven chamber by means of at least one direct burner in order to establish a temperature T1 in the range of 450&#xb0; C. to 1,000&#xb0; C. and maintaining temperature T1 for 5 min-48 h; whereby, once the oven chamber is closed, any gas exchange between the oven chamber and the surroundings can take place only via the at least one direct burner and the at least one exhaust gas conduit.

Process and device for burn-off of precious metal-containing materials

Process for removing precious metal from precious metal-containing catalyst form bodies comprising form bodies and precious metal, whereby the precious metal to be removed is at least one precious metal selected from the group consisting of Au, Ag, Pd, Pt, Ir, Rh, Ru, Os, and Re, comprising the steps of: (a) producing a mixture of precious metal-containing catalyst form bodies in at least one mineral acid that is at least 1N; (b) supplying inert or oxidizing gas into the mixture containing noble metal-containing catalyst form bodies and mineral acid; (c) introducing at least one oxidation agent, in solid or liquid form, into the mixture containing noble metal-containing catalyst form body and mineral acid; and (d) separating the form bodies from the liquid.

Process for removing precious metal from precious metal-containing catalyst form bodies

A process for production of a PGM (platinum group metal)-enriched alloy containing iron and PGM(s) (platinum, palladium and/or rhodium) includes steps of: (1) providing a sulfur-free PGM collector alloy, (2) providing a copper- and sulfur-free material capable of forming a molten slag-type composition including silicon dioxide and magnesium and/or calcium oxide, (3) melting the PGM collector alloy and slag-forming material within a converter until a multi-phase system of a lower high-density molten mass of PGM collector alloy and an upper low-density molten mass of slag-type composition has formed, (4) contacting an oxidizing gas with the lower high-density molten mass of step (3) until conversion of the PGM collector alloy into a PGM-enriched alloy, (5) separating an upper molten slag formed in step (4) from the PGM-enriched alloy by difference in density, (6) allowing the separated molten masses to cool down and solidify, and (7) collecting the solidified PGM-enriched alloy.

Process for the production of a PGM-enriched alloy

Palladium(0)-dibenzylidene acetone complexes Pd(dba), with y/x being from 1.5 to 3, are provided according to the invention at a purity of at least 99.5 wt. %. The use of said Pd(dba)complexes according to the invention is for determining their stoichiometry by means of elemental analysis. In the method for the production of Pd(dba)complexes from a Pd-containing educt and dibenzylidene acetone (dba) in alcohol, according to the invention a solution of the dba in alcohol pre-heated to more than 40&#xb0; C. is provided first and then the Pd-containing educt is added to the pre-heated solution upon which the complexes are precipitated by a base.

Palladium(0)-dibenzylidene acetone complexes

Preparation of halogenide-free Platinum(II)acetylacetonate [Pt(acac)] Platinum(II) hexafluoroacetylacetonate [Pt(hfac)], Platinum(II) trifluoroacetylacetonate [Pt(tfac)] or Platinum(II)-alkylsubstituted acetylacetonates by the reaction of a halogen free platinum (IV) oxo- or hydroxo-compound, such as PtO.nHO (n being an integer from 1 to 4) or HPt(OH)or NaPt(OH)or KPt(OH), with a reducing agent in aqueous solution in the presence of a stoichiometric or higher amount of acetylacetone (acac), potassium acetylacetoante (Kacac) sodium acetylacetonate (Naacac), hexafluoroacetylacetone (hfac), trifluoroacetylacetone (tfac) or alkyl substituted acetylacetones or their salts and an Hdonor.

Process for the preparation of platinum acetylacetonato complexes

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Limeshain, Germany

Steffen Voss