Disclosed is an incomplete extraction method for recycling batteries, which may include: introducing a pretreatment gas into a device loaded with a waste battery powder, and bringing a gas outlet into communication with absorption liquid A and absorption liquid B in order; raising the temperature and introducing the pretreatment gas; reducing the temperature and introducing a reaction gas; raising the temperature, introducing the reaction gas, and then introducing the pretreatment gas; and reducing the temperature, and turning off the pretreatment gas; adding an extractant to absorption liquid A, mixing the mixture, taking organic phase A, adding a stripping agent, and taking aqueous phase A; and adjusting the pH to acidity, then adding an extractant, taking organic phase B, adding a stripping agent to obtain a stock solution enriched in Li, Mn, Ni and Co.

Disclosed is a method for removing aluminum in a ternary battery material leachate by adopting an extraction method, which comprises the following steps: (1) saponification: mixing an extraction solvent with a saponifying agent to obtain a saponified extraction solvent; (2) extraction: mixing the ternary battery material leachate with the saponified extraction solvent to obtain a loaded organic phase and a raffinate; (3) back extraction: mixing the loaded organic phase with a back-extraction agent, followed by performing a back-extraction to obtain an organic phase and a back-extraction solution; the extraction solvent comprises an extracting agent and a diluent. The extraction method is adopted to separate nickel, cobalt, manganese and aluminum, having the advantages of less heavy metal entrainment, short process flow, and high metal recovery rate. The extraction rate of the aluminum can reach 97.42 percent.

A process for removal of aluminium and iron in the recycling of rechargeable batteries comprising providing a leachate from black mass, adding phosphoric acid (H.sub.3PO.sub.4) to said leachate and adjusting the pH to form iron phosphate (FePO.sub.4) and aluminium phosphate (AlPO.sub.4), precipitating and removing the formed FePO.sub.4 and AlPO.sub.4, and forming a filtrate for further recovery of cathode metals, mainly NMC-metals and lithium.

Disclosed are applications of a carboxylic compound serving as an extracting agent and a metal ion extraction method. The carboxylic compound is provided with the structure as represented by formula I. The extracting agent as represented by formula I is characterized by a secondary atom at position α of the carboxyl group, in distinction from a primary carbon carboxylic acid at position α and a tertiary carbon carboxylic acid at position α, the presence of a secondary carbon carboxylic acid provides a proper steric hindrance, provides improved selectivity with respect to ions, and provides a high separation coefficient, low stripping acidity, and high load rate when used for the extraction and separation of metal ions; moreover, the carboxylic compound of formula I has great stability and low aqueous solubility, allows an extraction process to be stable, reduces environmental pollution, reduces costs, and provides significant application prospects.

A method for recovering lithium from lithium ion battery scrap according to this invention comprises subjecting lithium ion battery scrap to a calcination step, a crushing step, and a sieving step sequentially carried out, wherein the method comprises, between the calcination step and the crushing step, between the crushing step and the sieving step, or after the sieving step, a lithium dissolution step of bringing the lithium ion battery scrap into contact with water and dissolving lithium contained in the lithium ion battery scrap in the water to obtain a lithium-dissolved solution; a lithium concentration step of solvent-extracting lithium ions contained in the lithium-dissolved solution and stripping them to concentrate the lithium ions to obtain a lithium concentrate; and a carbonation step of carbonating the lithium ions in the lithium concentrate to obtain lithium carbonate.

The present invention relates to a process for recovering one or more metal ions selected from the group consisting of Cobalt, Nickel, Manganese and a mixture thereof from metal-containing residues comprising: A) leaching the residue with a leaching solution comprising lactic acid to obtain a filtrate 1 and a solid cake 1; B) separating the filtrate 1; C) precipitating the Cobalt lactate, Nickel lactate or Manganese lactate from the filtrate 1 to obtain a filtrate 2 and a precipitate 1; and D) separating the precipitate 1; or alternatively, A) leaching the residue with the leaching solution to obtain a filtrate 1 and a solid cake 1; E) precipitating the Cobalt lactate, Nickel lactate or Manganese lactate from the filtrate 1 to obtain a filtrate 3 and a solid cake 2; and F) separating the solid cake 2; and G) separating the Cobalt lactate, Nickel lactate or Manganese lactate from the solid cake 2.

A method for the recovery of metals from a feed stream containing one or more value metals and lithium, the method comprising: subjecting the feed stream to a sulphuric acid leach to form a slurry comprising a pregnant leach solution of soluble metal salts and a solid residue; separating the pregnant leach solution and the solid residue; subjecting the pregnant leach solution to one or more separate solvent extraction steps, wherein each solvent extraction step recovers one or more value metals from the pregnant leach solution, the remaining pregnant leach solution comprising lithium; and recovery of lithium from the pregnant leach solution.

The present disclosure relates to a process for the recovery of transition metals from batteries comprising treating a transition metal material with a leaching agent to yield a leach which contains dissolved salts of nickel and/or cobalt, injecting hydrogen gas in the leach at a temperature above 100° C. and a partial pressure above 5 bar to obtain a nickel and/or cobalt precipitate in elemental form, and separating the obtained nickel and/or cobalt precipitate.

A method for recycling nickel, cobalt and manganese from a feed liquid containing nickel, cobalt and manganese, the method comprising: (1) subjecting the feed liquid to a first extraction to obtain an aqueous phase 1 and an organic phase 1; (2) subjecting the aqueous phase 1 to a second extraction to obtain an organic phase 2 and an aqueous phase 2 having a pH value of 5-7.5; and (3) successively subjecting the organic phase 2 to washing and reverse extraction to obtain a solution containing nickel, cobalt and manganese, wherein an extractant A used in the second extraction comprises a carboxylic acid extractant.

The present application provides a method for separating nickel from lithium, comprising: (1) performing a saponification reaction on an extraction reagent and an alkaline compound to obtain a saponified extraction agent, wherein the extraction reagent comprises a specific carboxylic acid compound; (2) performing extraction and layering on a nickel-lithium feed liquid by using the saponified extraction agent obtained at step (1), so as to obtain a loaded organic phase and a raffinate water phase; and (3) using a back extraction agent to perform back extraction on the loaded organic phase obtained at step (2), so as to obtain a metal ion enrichment solution and a regenerated organic phase.