Hydrometallurgical compositions are described in which organic amine-based lixiviants and organic amine-based pre-lixiviants are utilized in the selective recovery of rare earth elements. The lixiviant species can be regenerated in situ, permitting the organic amine to be used in substoichiometric amounts.

Methods and compositions are described in which amine-based compounds are utilized in the recovery of rare earth elements from solution. The rare earth elements are recovered selectively and sequentially.

A solution for leaching metals from clay containing ore and a method of leaching ore is described. The solution comprises a cyanide; a wetting agent; and a clay stabilizing polymer.

A solution for leaching metals from clay containing ore and a method of leaching ore is described. The solution comprises a cyanide; a wetting agent; and a clay stabilizing polymer.

The present disclosure provides for a method of obtaining metals from a source, including contacting the source with an ionic liquid in the absence of acid, thereby extracting the metals from the source and providing an ionic liquid extraction composition; and recovering the metals from the ionic liquid extraction composition, wherein the source includes coal, coal by-products, ore, tar, or electronic waste. Further, the present disclosure provides for a carbon material made by a process that includes contacting a source with an ionic liquid in the absence of acid, thereby extracting metals from the source and providing an ionic liquid extraction composition; and recovering the metals from the ionic liquid extraction composition, wherein the source includes coal, coal by-products, ore, tar, or electronic waste, further wherein the carbon material includes solids, liquids, carbon films, carbon fibers, carbon nanomaterials, or any combination thereof.

The agent for selective metal recovery of the present invention includes a material derived from an alga belonging to the order Cyanidiales, which is dead cells or a cell surface layer of an alga belonging to the order Cyanidiales, or an artificial material produced by simulating the cell surface layer, or includes a porphyrin. The metal recovery method of the present invention includes an addition step of adding a material derived from an alga belonging to the order Cyanidiales, which is dead cells or a cell surface layer of an alga belonging to the order Cyanidiales, or an artificial material produced by simulating the cell surface layer, or adding a porphyrin, to a metal solution; and a recovery step of recovering a metal from the metal solution by the material derived from an alga belonging to the order Cyanidiales or the porphyrin.

The present disclosure relates to calixpyrrole compounds and compositions thereof. The calixpyrrole compounds are chemical groups which are located in such a manner so as to be useful for the selective extraction of specific salts. Also provided herein are compositions and methods of use thereof.

The present disclosure provides Molecularly Imprinted Polymer (MIP) technology for selectively sequestering one or more target molecules from chemical mixtures. Also disclosed herein are MIP beads and methods of making and using thereof.

A solution for leaching metals from clay containing ore and a method of leaching ore is described. The solution comprises a cyanide; a wetting agent; and a clay stabilizing polymer.

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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