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公开(公告)号：US20220216534A1
公开(公告)日：2022-07-07
申请号：US17604002
申请日：2020-04-17
申请人： UMICORE
摘要： The present disclosure concerns the production of precursor compounds for lithium battery cathodes.
Batteries or their scrap are smelted in reducing conditions, thereby forming an alloy suitable for further hydrometallurgical refining, and a slag. The alloy is leached in acidic conditions, producing a Ni- and Co-bearing solution, which is refined.
The refining steps are greatly simplified as most elements susceptible to interfere with the refining steps concentrate in the slag. Metals such as Co, Ni and Mn are then precipitated from the solution, forming a suitable starting product for the synthesis of new battery precursor compounds.-
公开(公告)号：US20220223933A1
公开(公告)日：2022-07-14
申请号：US17603998
申请日：2020-04-17
申请人： UMICORE
发明人： Pieter VERHEES , Bart KLAASEN , Willem CALLEBAUT
摘要： The invention concerns a process for the recovery of metals such as Ni and Co from a Li-containing starting material.
In particular, this process concerns the recovery of metals M from a Li-containing starting material, wherein M comprises Ni and Co, comprising the steps of:
Step 1: Providing said starting material, comprising Li-ion batteries or their derived products; Step 2: Removing Li in an amount of more than the maximum of (1) 30% of the Li present in said starting material, and (2) a percentage of the Li present in said starting material determined to obtain a Li:M ratio of less than 0.70 in a subsequent acidic leaching step; Step 3: Subsequent leaching using relative amounts of Li-depleted product and a mineral acid, thereby obtaining a Ni- and Co-bearing solution; and, Step 4: Crystallization of Ni, Co, and optionally Mn. Due to the lower reagent consumption and higher Ni and/or Co concentration during hydrometallurgical processing, the invention is an efficient and economic process for the production of crystals suitable for battery material production.
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