A method for recovering platinum group metals, includes melting a material to be treated containing platinum group metals, under heating in a furnace, along with a copper source material containing at least one kind of metallic copper and copper oxide, a flux component, and a reducing agent. The molten metal absorbing the platinum group metals is separated from a slag oxide through difference in specific gravity. The molten metal absorbing the platinum group metals is subjected to an oxidation treatment. An oxide layer containing as a major component copper oxide and a molten metal containing as a major component metallic copper containing the platinum group metals concentrated therein are separated through difference in specific gravity. A silver content in the molten metal separated in melting under heating is controlled to 2,000 ppm or more and 8,000 ppm or less, thereby recovering platinum group metals with high efficiency.

Disclosed is a method for recycling a hydrogen fuel cell of a new energy vehicle, including the following steps of: (1) discharging and disassembling a hydrogen fuel cell in turn to obtain a hydrogen supply system, an air supply system, a cooling system and a galvanic pile; (2) disassembling the galvanic pile into a catalyst and carbon cloth, and ashing to obtain ash; (3) adding an auxiliary agent into the ash, mixing, introducing inert gas, heating, introducing oxidizing gas, and absorbing tail gas by using an ammonium salt solution; and (4) adding a reducing agent into the ammonium salt solution absorbing the tail gas in step (3) to react, filtering, taking and cleaning a filter residue to obtain Pt.

The invention concerns a process suitable for the recovery of platinum group metals (PGM) present in PGM-bearing catalysts comprising silicon carbide (SiC). More particularly, the process for the recovery of PGM present in PGM-bearing catalysts comprising SiC, comprises the steps of preparing a metallurgical charge by mixing the PGM-bearing catalysts with an Fe-oxide compound in an amount sufficient to oxidize at least 65% of the SiC, and feeding the metallurgical charge and slag formers to a smelting furnace operating in conditions susceptible to form a liquid Fe-based bullion, which contains PGM, and a liquid slag. Good to excellent PGM yields are obtained.

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.

Provided is a platinum-group metal recovery method for efficiently recovering a platinum-group metal. The method for recovering a platinum-group metal includes an immobilization step of causing a molten product of a raw material containing a platinum-group metal, a molten product of a carbonate or hydroxide of an alkali metal, a molten product of an oxide, and a ceramic material to make contact with each other so as to immobilize the platinum-group metal on the ceramic material.

A method for recovery of platinum group metals from a spent catalyst is described. The method includes crushing the spent catalyst to obtain a catalyst particulate material including particles having a predetermined grain size. The method includes subjecting the catalyst particulate material in the reaction zone at a predetermined temperature for a predetermined time period in contact with solid chlorine-containing material and solid silicon-containing material to obtain volatile platinum group metal-containing chloride product, and cooling to convert the product into solid phase platinum group metal-containing materials.

Disclosed is a method for recycling a hydrogen fuel cell of a new energy vehicle, including the following steps of: (1) discharging and disassembling a hydrogen fuel cell in turn to obtain a hydrogen supply system, an air supply system, a cooling system and a galvanic pile; (2) disassembling the galvanic pile into a catalyst and carbon cloth, and ashing to obtain ash; (3) adding an auxiliary agent into the ash, mixing, introducing inert gas, heating, introducing oxidizing gas, and absorbing tail gas by using an ammonium salt solution; and (4) adding a reducing agent into the ammonium salt solution absorbing the tail gas in step (3) to react, filtering, taking and cleaning a filter residue to obtain Pt.

A recycling process that facilitates separation of materials from metallic substrates by cryogenically cooling the recyclable items to induce embrittlement of the metals. Embrittled metals may be shattered more efficiently and with a higher yield of materials bound to the metallic substrates. Metal embrittlement may be induced by mixing the source stream with liquid nitrogen, and cooling the stream to approximately minus 200° F. Multiple recovery stages may be employed to maximize the yield of the target materials. Embodiments may enable recovery of platinum group metals (PGMs) from catalytic converters with metallic foil substrates. Yield of PGMs may be enhanced by employing a primary recovery stage and a secondary recovery stage, by cryogenically cooling input materials for each stage, by mixing the pulverized material in secondary recovery with an aqueous solution to dissipate attractive charges, and by wet screening the pulverized material slurry to obtain the PGM particles.

A method for recovering ruthenium from a spent ruthenium-based catalyst carried on aluminum oxide includes: drying, calcining, and cooling a spent catalyst; grinding the spent catalyst into black powder; placing the black powder in a fluidized bed reactor, purging the reactor with hydrogen and heating the black powder to obtain ruthenium metal, then heating the black powder in a mixed atmosphere of oxygen and ozone to obtain RuO.sub.4 gas; absorbing the RuO.sub.4 gas with a sufficient amount of hydrochloric acid to obtain a H.sub.3RuCl.sub.6 solution; adding an excess oxidant to the H.sub.3RuCl.sub.6 solution to oxidize the H.sub.3RuCl.sub.6 into H.sub.2RuCl.sub.6; adding excess NH.sub.4Cl to the H.sub.2RuCl.sub.6 and then filtering, and washing the filter cake to obtain solid (NH.sub.4).sub.2RuCl.sub.6; and reducing the solid (NH.sub.4).sub.2RuCl.sub.6 by hydrogen to obtain ruthenium metal.

Method of selective extraction of a metal of the family of platinoids, from a ceramic support containing said metal, comprising the following successive steps: a) said ceramic support containing said metal is brought into contact, in an extraction chamber, with an extraction medium consisting of a pressurized dense fluid containing an organic ligand that is selective for the metal and that is capable of forming a complex with said metal in the 0 state; whereby are obtained, on the one hand, a ceramic support depleted in said metal, or even free of said metal, and, on the other hand, a medium consisting of the pressurized dense fluid containing the complex of the organic ligand with the metal in the 0 state; b) said pressurized dense fluid containing the complex of the organic ligand with the metal in the 0 state is brought back to atmospheric pressure and to ambient temperature, whereby the complex of the organic ligand with the metal in the 0 state separates from the fluid; c) the ceramic support depleted in said metal, or even free of said metal, and the complex of the organic ligand with the metal in the 0 state, are recovered.