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.

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 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.

A hydrometallurgical process and system for the recovery of precious metals; specifically, palladium, rhodium, and platinum metals, at high purity and with limited waste and environmental fouling.

A hydrometallurgical process and system for the recovery of precious metals; specifically, palladium, rhodium, and platinum metals, at high purity and with limited waste and environmental fouling.

The present invention relates to a method for recovering at least one kind of metal selected from the group consisting of gold (Au) and palladium (Pd), the method including: an addition process of adding a metal adsorbent to a solution containing the metal; and an adsorption process of causing the metal to be adsorbed on the metal adsorbent, wherein the metal adsorbent comprises at least one selected from the group consisting of a cell and a cell-derived article of microorganism belonging to Cyanidiales, a processed article of the cell and the cell-derived article, and an artificial substance mitigating the cell, the cell-derived article, and the processed article, and wherein the solution is a nitric acid solution or a sulfuric acid solution.

The present invention relates to a process for dissolving metals in perhalide containing ionic liquids, and to the extraction of metals from mineral ores; the remediation of materials contaminated with heavy, toxic or radioactive metals; and to the removal of heavy and toxic metals from hydrocarbon streams.

The present invention relates to a process for dissolving metals in perhalide containing ionic liquids, and to the extraction of metals from mineral ores; the remediation of materials contaminated with heavy, toxic or radioactive metals; and to the removal of heavy and toxic metals from hydrocarbon streams.

A sequential treatment process for primary and secondary copper sulphide heap leaching such as Chalcopyrite, Bornite, Chalcosine, Coveline or other sulfide and mixed copper ores is provided. Specifically, the treatment process consists of a sequential treatment of crushed ore with size p80 less than 38 mm, preferably under 19 mm, which is arranged in a dynamic heap or primary leaching heap, in which once leached in the dynamic heap, the ore is removed from the heap and transferred to a new heap to be subjected to a secondary leaching process in a permanent heap, where the leaching process in all its stages is carried out under increased concentrations of chlorine ion, [Cl.sup.?]>40 g/L, which improves the thermodynamics and physic-chemical balances that the solutions of the process are established, which generates important benefits on the metallurgical performance of this sequential treatment.

The invention relates to a method and a recovery system for obtaining raw materials from ores and/or ore tailings, in particular a method and a recovery system for recovering metals from ores and/or ore tailings, especially a method and a recovery system for recovering metals from pyrite tailings, preferably from roasted pyrites produced during sulphuric acid manufacture.