The present disclosure provides a polymetallic-ore beneficiation and separation reagent, a preparation method therefor and use thereof. The preparation method for a polymetallic-ore beneficiation and separation reagent, includes following steps: (1) mixing a substance A, caustic soda, soda ash and sodium polysulfide, and then heating the same and performing a catalytic reaction, to render an intermediate product B, wherein the substance A includes one or more of urea, glycine, urea peroxide, ammonium cyanate and isocyanic acid; and (2) mixing the intermediate product B with trichloroisocyanuric acid, dichloroisocyanuric acid and 2-amino-3-(4-imidazolyl)propanoic acid, to render the polymetallic-ore beneficiation and separation reagent.

Process to recover copper from a process feed including one or more feed components containing a base metal sulphidic feed, iron, copper and arsenic. Process feed and aqueous quench solution are introduced to a pressure oxidative leaching step with a partial pressure of oxygen above 200 kPa to form free sulphuric acid, to solubilize copper and other metal in the feed as aqueous sulphate compounds and to precipitate arsenic as solid iron arsenic compounds. A treated slurry comprising a liquid phase containing sulphuric acid and copper sulphate, and solids containing the iron arsenic compounds is withdrawn and the liquid phase is separated from the solids. To lessen arsenic re-dissolution and to maintain stability of the solid iron arsenic compounds, one or more of temperature, free acid level and residence time of the treated slurry is controlled. Copper metal is recovered from the separated liquid phase.

The present invention relates to compositions and processes for the extraction of metals from solid material using non-aqueous solvents and oxidisers. The processes and compositions of the present invention are useful for selectively extracting metals from solid material, particularly electronic waste material.

The present disclosure is related to carbonation and selective ammonia leaching for the recovery of minor metals.

The present invention provides a scalable method for recycling end-of-life lithium-ion batteries by selectively extracting and recovering valuable metals. The method includes dissolving battery cathode material in acid to create a feed solution. The method further includes pre-wetting the porous sidewalls of a hollow fiber membrane module with an organic solvent and an extractant, for example di-(2-ethylhexyl)phosphoric acid. During the extraction process, the feed solution flows along one side of the hollow fibers, while a strip solution moves along the opposite side of the hollow fibers. To optimize separation, the pH of the feed solution is maintained between 2.5 and 3.0, while the acid concentration of the strip solution is maintained between 0.5M and 3.0M. The extractant continuously and selectively removes aluminum, copper, and other metals from the feed solution, while preventing the extraction of lithium, cobalt, and nickel.

A process for separating one or more elements among the rare-earth elements from other metals in columns 4 to 14 of the Periodic Table of the Elements, in admixture in aqueous solution. The process uses a polyethyleneimine-CS2 adduct in the form of a salt and involves liquid/solid separation to obtain a solid predominantly containing the rare-earth elements.

Disclosed are approaches for recycling LIBs where lithium is recovered before the other node metals in order to increase the amount of lithium recovered. For such approaches, the other node metals need not be further refined or recovered and, despite the small loss of these other node metals as impurities in the first-recovered lithium, the available alternative dispositions for these other node metalssuch as in the form of multi-metal-oxides (MMO)can render the recovery of lithium before the other node metals to be advantageous. Several such approaches may feature nitration, roasting, lithium trapping, and/or other innovative features to facilitate greater and purer recoveries of the target LIB components.

Provided is a method and apparatus for extracting a copper/tin source material from an oxalate of copper and/or tin. The method includes the following steps: (1) approach 1: allowing cupric oxalate and/or stannous oxalate to undergo a chemical reaction with a hypochlorite in a hypochlorite-containing aqueous solution to produce a copper compound-containing and/or tin compound-containing precipitate, which is accompanied by release of carbon dioxide; and/or approach 2: allowing the cupric oxalate and/or the stannous oxalate to undergo a chemical reaction in a solution including an alkaline substance to produce a copper compound-containing and/or tin compound-containing precipitate, where the alkaline substance includes a potassium-containing alkaline substance; and (2) solid-liquid separating to produce a filter residue A and a filtrate B, where the filter residue A is the copper compound-containing and/or tin compound-containing precipitate.

The present disclosure is directed to a process for recovering copper and cobalt from a copper and cobalt-containing sulfide ores and concentrates, particularly relatively low grade cobalt bearing sulfide ores and concentrates.

A method for processing a lithium-ion battery waste by hydrometallurgical processing of the lithium-ion battery waste to obtain a leachate in which at least cobalt and nickel are dissolved, the method comprising: a hydrometallurgical processing step of adding at least one compound (1) selected from the group consisting of ammonia and a salt thereof, and an amine compound and a salt thereof to the lithium-ion battery waste and mixing them to obtain the leachate in which at least the cobalt and the nickel are dissolved; and a solid-liquid separation step of removing at least a part of metals not dissolved in the leachate by solid-liquid separation after the hydrometallurgical processing step.