Regeneration process of cobalt-removing resin

Abstract

The invention relates to a regeneration process of cobalt-removing resin, after the cobalt-removing resin adsorbs decarburized tetracobalt wastewater to be saturated, the regeneration process is carried out on the cobalt-removing resin, the cobalt-removing resin is CH-90 divalent chelated cobalt-removing resin, and the ion form of the cobalt-removing resin is hydrogen type; the regeneration technology comprises the steps that hydrochloric acid is adopted for regeneration, after regeneration is completed, decarburized tetracobalt wastewater is adopted for flushing, and a certain amount of ammonia water is added to adjust the pH value. The ion form in the cobalt removal resin is a hydrogen form rather than a traditional sodium form directly adopted in the market at present, the regenerationliquid is regenerated by hydrochloric acid, the cobalt removal resin is completely suitable for the cobalt removal process of the tetracobalt wastewater, and other impurity ions are not introduced; the regenerated hydrogen-type resin is flushed by adopting the decarburized tetracobalt wastewater, the hydrogen-type resin is replaced by the ammonium-type resin, and the ammonia water is added to adjust the pH value back to the original pH value of the tetracobalt wastewater, so that the strong fluctuation of the pH value of the system is not caused in the next period of adsorption, the subsequentevaporation process can be quickly carried out, and the investment and the operation cost are saved.

Description

technical field [0001] The invention relates to the field of advanced wastewater treatment, in particular to a regeneration process for cobalt-removing resin. Background technique [0002] Lithium battery cathode materials account for a relatively large proportion of the main constituent materials of the battery, and the quality of the cathode material is about 3 to 4 times that of the anode material. At the same time, the performance of the cathode material directly affects the performance of the lithium ion battery, and its cost also directly determines The battery cost is high and low. LiCoO 2 It is the only commercial lithium-ion battery cathode material with excellent comprehensive performance. LiCoO 2 Mainly use battery grade Co 3 o 4 For the wet preparation of the precursor, a large amount of tetracobalt wastewater or tetracobalt mother liquor will be produced during the preparation process. The tetracobalt wastewater needs to be effectively treated to avoid envi...

AI Technical Summary

Problems solved by technology

[0006] Generally, it needs to run continuously for more than 3 hours before the pH value of the cobalt removal water will rise to above 5, so as to ensure the stable operation of the evaporation and subsequent systems; for materials with a pH value between 2 and 3 of the cobalt removal water, use Adding pH adjustment equipment to adjust the pH will greatly increase the amount of chemicals used, that is, the operating cost, and will also increase the equipment investment cost

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