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Issues with comprehensive calcium removal using EDTA and chelating resins? ? ?

2016-01-30View Original

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The current production process is used to manufacture high-purity lithium carbonate; to meet the required standards, an excess of EDTA is added during production to complex the Ca ions. However, to produce high-purity lithium carbonate mother liquor, it is necessary to return to the previous processing stage; this stage includes a process using chelating resins for calcium removal, and the working environment has a pH of 8–12. May I ask, in the EDTA system, can chelating resins remove calcium? ? ? ?

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