Abstract: A method for producing a collector alloy comprising 25 to 100 wt % precious metal in total, comprising 0 to <97 wt % of the precious metal silver, 0 to 75 wt % of at least one precious metal selected from gold, platinum, rhodium and palladium, and 0 to 75 wt % of at least one non-precious metal selected from copper, iron, tin and nickel, or for producing pure silver, comprising the steps of: (1) providing precious metal sweeps; (2) providing a flux which, during collective melting with the refractory inorganic material from the precious metal sweeps provided in step (1); (3) collective melting of the materials provided in steps (1) and (2) at a temperature in the range of from 1300 to 1600° C., forming a melt comprising at least two phases of different densities arranged one above the other; and. (4) separating the upper phase and the lower phase.

Abstract: A method for producing a PGM collector alloy comprising the steps of: (1) providing (a) copper and/or silver, (b) material, which is to be processed melt-metallurgically, in the form of at least one sodium and/or potassium aluminosilicate support equipped with at least one PGM, and (c) at least one compound selected from the group consisting of iron oxides, calcium oxide, magnesium oxide, calcium carbonate, magnesium carbonate, sodium carbonate, and potassium carbonate, (2) joint melting of the materials provided in step (1) at a temperature in the range of 1250 to <1450° C.

Abstract: A process for the incineration of precious metal catalyst briquettes, wherein the precious metal catalyst briquettes comprise precious metal catalyst, optionally water, and, also optionally, binder.

Abstract: A process for the incineration of activated coal-supported PGM catalysts, the process comprising a joint incineration of a multilayer arrangement, wherein the multilayer arrangement includes (i) a top layer of particulate activated coal-supported PGM catalyst, (ii) a layer of coarse charcoal located beneath said top layer and, optionally, (iii) a layer of particulate coke located beneath the charcoal layer, and wherein an upward flow of oxidizing gas is homogeneously passed through said multilayer arrangement during the incineration.

Abstract: A process for the incineration of activated coal-supported PGM catalysts, the process comprising a joint incineration of a multilayer arrangement, wherein the multilayer arrangement includes (i) a top layer of particulate activated coal-supported PGM catalyst, (ii) a layer of coarse charcoal located beneath said top layer and, optionally, (iii) a layer of particulate coke located beneath the charcoal layer, and wherein an upward flow of oxidizing gas is homogeneously passed through said multilayer arrangement during the incineration.