The invention relates to methods for recovering precious metals from feedstocks including solid feedstocks including urban feedstocks, such as electronic waste, and leachates thereof, and/or from liquid feedstocks. In certain examples, methods for recovery of target metals, such as gold, using a support material are provided, as are target metal-laden materials so produced.
The invention relates to methods for selectively recovering valuable metals including lithium, nickel, and/or cobalt from feedstock, such as a waste feedstock such as end-of-life lithium-ion batteries, and in particular from waste streams such as black mass derived in whole or in part from NMC type cathode material from such batteries.
C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
C22B 3/00 - Extraction of metal compounds from ores or concentrates by wet processes
C22B 3/14 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions containing ammonia or ammonium salts
C22B 3/22 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means
C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
The invention relates to methods for recovering precious metals from feedstocks including urban feedstocks, such as electronic waste and leachates thereof. In particular, selective methods for target metal reduction/binding and recovery of target metals, such as gold, using a support material are provided.
B01D 15/36 - Selective adsorption, e.g. chromatography characterised by the separation mechanism involving ionic interaction, e.g. ion-exchange, ion-pair, ion-suppression or ion-exclusion
B01J 20/24 - Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
B09B 3/70 - Chemical treatment, e.g. pH adjustment or oxidation
B09B 3/80 - Destroying solid waste or transforming solid waste into something useful or harmless involving an extraction step
C22B 3/00 - Extraction of metal compounds from ores or concentrates by wet processes
C22B 3/06 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions
C22B 3/16 - Extraction of metal compounds from ores or concentrates by wet processes by leaching in organic solutions
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
The invention relates to a method for recovering precious metals from electronic waste utilising biometallurgical techniques. In one aspect, a method of recovering one or more target metals from electronic waste, includes (a) removing at least a portion of non-target material from the electronic waste or grinding to a preselected size particle to give pre-processed electronic waste; (b) contacting the pre-processed electronic waste with a lixiviant such that at least a portion of the target metal(s) dissolve into the lixiviant to produce a pregnant solution; (c) contacting a microorganism with the pregnant solution such that at least a portion of the target metal(s) ions biosorb to the microorganism wherein the microorganism becomes metal laden and the pregnant solution becomes barren; (d) substantially separating the metal laden microorganism from the barren solution; and (e) recovery of the target metal(s) from the metal laden microorganism.
C22B 3/18 - Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae
C22B 3/26 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
The invention relates to a process for recovering metals from aqueous solutions or solid feedstocks such as ores and waste. In particular, the invention relates to a method of recovering a target metals using a microorganism.
C22B 3/18 - Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
C02F 101/20 - Heavy metals or heavy metal compounds
The invention relates to a process for recovering metals from aqueous solutions or solid feedstocks such as ores and waste. In particular, the invention relates to a method of recovering a target metal using a microorganism and recycling depleted growth media or depleted lixiviant back through the process.
The invention relates to a method for recovering precious metals from electronic waste. In particular, biometallurgical techniques are utilised during the process. In a first aspect, the invention provides a method of recovering one or more target metals from electronic waste, the method comprising (a) a pre-processing step comprising removing at least a portion of non-target material from the electronic waste or grinding to a preselected size particle to give pre-processed electronic waste; (b) a dissolving step comprising contacting the pre-processed electronic waste with a lixiviant such that at least a portion of the target metal(s) dissolve into the lixiviant to produce a pregnant solution; (c) a biosorption step comprising contacting a microorganism with the pregnant solution such that at least a portion of the target metal(s) ions biosorb to the microorganism wherein the microorganism becomes metal laden and the pregnant solution becomes barren; (d) a separating step comprising substantially separating the metal laden microorganism from the barren solution; and (e) a recovery step comprising recovery of the target metal(s) from the metal laden microorganism. In particular embodiments, the target metal is gold.
The invention relates to a method for recovering precious metals from electronic waste. In particular, biometallurgical techniques are utilised during the process. In a first aspect, the invention provides a method of recovering one or more target metals from electronic waste, the method comprising (a) a pre-processing step comprising removing at least a portion of non-target material from the electronic waste or grinding to a preselected size particle to give pre-processed electronic waste; (b) a dissolving step comprising contacting the pre-processed electronic waste with a lixiviant such that at least a portion of the target metal(s) dissolve into the lixiviant to produce a pregnant solution; (c) a biosorption step comprising contacting a microorganism with the pregnant solution such that at least a portion of the target metal(s) ions biosorb to the microorganism wherein the microorganism becomes metal laden and the pregnant solution becomes barren; (d) a separating step comprising substantially separating the metal laden microorganism from the barren solution; and (e) a recovery step comprising recovery of the target metal(s) from the metal laden microorganism. In particular embodiments, the target metal is gold.
The invention relates to a process for recovering metals from aqueous solutions or solid feedstocks such as ores and waste. In particular, the invention relates to a method of recovering a target metal using a microorganism and recycling depleted growth media or depleted lixiviant back through the process.
C22B 3/18 - Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae
C22B 3/20 - Treatment or purification of solutions, e.g. obtained by leaching
C22B 3/24 - Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means by adsorption on solid substances, e.g. by extraction with solid resins
A method of recovering a target metal from a pregnant aqueous solution containing dissolved target metal is provided. In one embodiment, the method comprises: providing a pregnant aqueous solution containing dissolved target metal ions; contacting a microorganism with the pregnant aqueous solution such that at least a portion of the dissolved target metal ions biosorb to the microorganism, wherein the microorganism becomes metal laden and the pregnant aqueous solution becomes a barren solution, the barren solution comprising less than 1 ppm target metal; separating the metal laden microorganism from the barren solution; and recovery of the target metal from the metal laden microorganism.
B01D 15/00 - Separating processes involving the treatment of liquids with solid sorbentsApparatus therefor
B01J 20/22 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising organic material
C02F 1/28 - Treatment of water, waste water, or sewage by sorption
C22B 3/18 - Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae
The invention relates to a process for recovering metals from aqueous solutions or solid feedstocks such as ores and waste. In particular, the invention relates to a method of recovering a target metals using a microorganism.
C22B 3/18 - Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae
C02F 1/28 - Treatment of water, waste water, or sewage by sorption
B01J 20/22 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising organic material
B01D 15/00 - Separating processes involving the treatment of liquids with solid sorbentsApparatus therefor
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