The present application relates to methods for leaching and extraction of precious metals. For example, the present application relates to methods of leaching gold, palladium and/or platinum from a substance comprising gold, palladium and/or platinum (such as a gold-containing ore or a platinum group metal (PGM) concentrate) using an organic solvent that is water-miscible or partially water-miscible.

The present application relates to methods for the simultaneous leaching and extraction of precious metals. For example, the present application relates to methods of leaching and extracting gold and/or palladium from a substance comprising gold and/or palladium such as a gold and/or palladium-containing ore in one step using a compound of Formula I: (I).

The present application relates to methods for the simultaneous leaching and extraction of precious metals. For example, the present application relates to methods of leaching and extracting gold and/or palladium from a substance comprising gold and/or palladium such as a gold and/or palladium-containing ore in one step using a compound of Formula I: (I)

The present application relates to methods for the simultaneous leaching and extraction of precious metals. For example, the present application relates to methods of leaching and extracting gold and/or palladium from a substance comprising gold and/or palladium such as a gold- and/or palladium-containing ore in one step using a compound of Formula I:(I). ##STR00001##

The present application relates to methods for leaching and extraction of precious metals. For example, the present application relates to methods of leaching gold, palladium and/or platinum from a substance comprising gold, palladium and/or platinum (such as a gold-containing ore or a platinum group metal (PGM) concentrate) using an organic solvent that is water-miscible or partially water-miscible.

The present applications relates to methods for the simultaneous leaching and extraction of precious metals. For example, the present application relates to methods of leaching and extracting gold and/or palladium from a substance comprising gold and/or palladium such as a gold- and/or palladium-containing ore in one step using a compound of Formula I:(I).

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The present application relates to methods for leaching and extraction of precious metals. For example, the present application relates to methods of leaching gold, palladium and/or platinum from a substance comprising gold, palladium and/or platinum (such as a gold-containing ore or a platinum group metal (PGM) concentrate) using an organic solvent that is water-miscible or partially water-miscible.

The present application discloses a gold recovery system and recovery method thereof from a gold separation solution, where the recovery system includes an gold selective extraction system, a reduction system, a washing system, and an evaporation system; and the recovery method specifically includes the following steps: (1) primary extraction; (2) secondary extraction; (3) gold precipitation by reduction; (4) washing of gold powder; and (5) evaporation of waste solution. In the present application, by using chloride ions to recognize AuCl.sub.4.sup., the gold-rich solution is directly reduced to produce qualified gold powder product (99.995%); the gold-barren solution and the post-reduction solution are evaporated and concentrated, with the condensate reused to realize the recovery and regeneration of chloride ions, the recycling of the extractant and no generation of waste solution or waste gas in the production process.

A lithium extraction agent for lithium precipitation mother liquor includes a solute and an organic solvent. The solute includes at least one of 2,3,7,8-tetraaminophenazine-1,4,6,9-tetrone and terpyridine, and the organic solvent includes at least one of dichloromethane, chloroform, carbon tetrachloride, bromobenzene, and carbon disulfide. The lithium extraction agent can be used to extract lithium from the lithium precipitation mother liquor with a wide pH range. After entering the lithium extraction agent, lithium ions quickly complex with the solute in the lithium extraction agent to form a solid phase. It only requires leaving the extracted mixture A to stand for phase separation, allowing lithium to exist in a lithium-containing solid complex in the lower oil phase, and filtering the lower oil phase to obtain the lithium-containing solid complex, and the lithium-containing solid complex has a low sodium residue content.

A lipophilic derivative of an aminopolycarboxylic acid may be used as an extractant to extract at least one rare earth from an acidic aqueous solution. Such a lipophilic derivative may be applied to the production of rare earths from concentrates derived from urban ores and, in particular, from concentrates from waste electrical and electronic equipment such as used or discarded NdFeB permanent magnets. Such a lipophilic derivative may be used in producing rare earths from concentrates derived from natural ores or from concentrates derived from residues of natural ores.