Method for producing lithium adsorbent precursor after roasting and method for producing granulated body for lithium adsorption

Abstract

To provide a method for producing a lithium adsorbent precursor after roasting that contains much tetravalent manganese having low solubility to water. The method for producing the lithium adsorbent precursor after roasting includes an oxidation roasting step of performing oxidation roasting on powdery lithium adsorbent precursor containing manganese at 300° C. or more and 600° C. or less to obtain powdery lithium adsorbent precursor after roasting. Performing the oxidation roasting on the powdery lithium adsorbent precursor containing the manganese at the predetermined temperature allows converting divalent manganese into tetravalent manganese. Since the tetravalent manganese has low solubility to water, when the lithium adsorbent is used, dissolution of the lithium adsorbent into water can be reduced.

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