W.c. Heraeus Gmbh & Co Kg

W.c. Heraeus Gmbh

Heraeus Precious Metals Gmbh & Co. Kg

Umicore Ag & Co Kg

Heraeus Deutschland Gmbh & Co Kg

Heraeus Materials Technology Gmbh & Co. Kg

Martin Stettner

Jochen Schlessmann

Matthias Grehl

Horst Meyer

Christian Mock

Christian Nowottny

Hans-Joachim Alt

Dieter Sch&auml;fer

Klaus Zimmermann

Joachim Kralik

Hermann Von Eiff

Peter Patzelt

Wilhelm Glab

Dieter Schäfer

Dieter Schaefer

Dieter Schafer

Jochen Schleβmann

Oswald Kinz

Robert Hartmann

Bernd Zell

The invention relates to the provision of noble metal-containing mixtures for a process for processing them by heating the mixture, preferably for processing them by means of an ashing process. This provision is characterized by the following measures: (a) moistening of the noble metal-containing mixture to be processed, (b) introduction of the moistened noble metal-containing mixture into at least one container which serves as diffusion barrier for water, and (c) introduction of the loaded container into a heat-resistant chamber together with at least one upper refractory mat. The noble metal-containing mixture is preferably moistened in the presence of a porous material and the chamber is closed by means of a heat-resistant covering. The invention further provides a processing process comprising the provision of noble metal-containing mixtures and also the heat-resistant chamber loaded with noble metal-containing mixtures itself. The process of the invention enables simple, clean recovery of noble metals in high yield from noble metal-containing mixtures.

Process for providing noble metal-containing mixtures for recovering noble metals

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

A recycling furnace is provided for processing potentially explosive precious metal-containing materials having organic fractions that combust with great energy. The furnace includes a switching facility for alternating operation of two burning-off chambers of the furnace between: (A) pyrolysis or carbonization under protective furnace gas in an atmosphere comprising maximally 6 wt-% oxygen, and (B) oxidative combustion of the organic fractions including carbon. The furnace has indirect heating and a control that determines the end of the pyrolysis or carbonization by a sensor and controls the switching facility to supply air or oxygen to the interior of the furnace. A continuous conveyor for dosing of liquids or liquefied substances during the pyrolysis is controlled by at least one parameter of post-combustion, preferably a temperature sensor. A single waste gas treatment facility is used for thermal post-combustion for the two furnace chambers.

Recycling furnace for burning off precious metal-containing materials

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

A recycling furnace and method are provided for processing potentially explosive precious metal-containing materials having organic fractions that combust with great energy, the furnace including a switching facility for alternating operation of a burning-off chamber of the furnace between: (A) pyrolysis or carbonization under protective furnace gas in an atmosphere comprising maximally 6 wt-% oxygen, and (B) oxidative combustion of the organic fractions including carbon. The furnace has indirect heating and a control that determines the end of the pyrolysis or carbonization by a sensor and controls the switching facility to supply air or oxygen to the interior of the furnace. Steps (A) and (B) are carried out sequentially in the furnace chamber, wherein neither the batch is changed, nor the furnace is opened. After the end of step (A) is determined, step (B) proceeds right after the pyrolysis or carbonization by supplying air or oxygen. A dosing of liquid or liquefied substances during the pyrolysis is controlled by at least one parameter of post-combustion. Thermal post-combustion is used for two furnace chambers, one operated for pyrolysis or carbonization and the other operated as a combustion chamber.

Method and device for burning-off precious metal-containing materials

A method for dissolving base metals and noble metals from ores having base metals and noble metals which comprises adding the ore to a solution of a non-acid oxidizing agent, then adding an aqueous solution of an acid forming halide and then adjusting the H concentration of the combined solutions to a minimum H concentration of 1 mol/l.

Method for dissolving base metals and nobel metals from ores containing them

Method for extracting osmium and ruthenium from noble metal concentrates

Method for the separation of ruthenium from noble metal solutions

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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Goldbach, Germany

Matthias Grehl