Abstract

Sorption of a series of alkaline earth and nonferrous metals (Ca, Mg, Cu, Ni, and Zn) from lithium hydrocarbonate and chloride solutions onto ion-exchange resins of various classes was studied. The highest values of the static exchange capacity were observed in sorption from a LiHCO₃ solution onto imino carboxylic ion exchangers Amberlite IRC 748 (Rohm and Haas, the United States), Purolite S930 (Purolite, the United Kingdom), and AXIONIT 3S (AO Aksion RDM, Russia). In sorption from a LiCl solution with рН 1.4, the sorption capacity of all the sorbents tested is 3–7 lower. Sorption treatment of a LiHCO₃ solution to remove Na, K, Са, Mg, Al, Si, Ti, Cr, Mn, Fe, Ni, Cu, and Zn impurities under dynamic conditions using AXIONIT 3S imino carboxylic sorbent was performed. The sorption ensures deep removal of Ca, Cu, and Zn impurities from a LiHCO₃ solution. A procedure was suggested for preparing high-purity lithium carbonate by ion-exchange purification of a LiHCO₃ solution on an imino carboxylic sorbent, followed by thermal decomposition of the purified solution at the boiling point to obtain a lithium carbonate precipitate. Lithium carbonate with the main substance content of 99.90 ± 0.05 wt % was obtained.

中文翻译：

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络合离子交换树脂制备高纯碳酸锂

摘要

研究了将一系列碱土金属和有色金属（Ca，Mg，Cu，Ni和Zn）从碳酸锂和氯化物溶液中吸附到各种类型的离子交换树脂上的方法。在从LiHCO ₃溶液吸附到亚氨基羧酸离子交换剂Amberlite IRC 748（美国罗门哈斯），Purilite S930（英国Purolite）和AXIONIT 3S（AO）上观察到的静态交换容量最高值。俄罗斯Aksion RDM）。从рН1.4的LiCl溶液中进行吸附时，所有测试的吸附剂的吸附能力都降低了3–7。LiHCO _3的吸附处理使用AXIONIT 3S亚氨基羧酸吸附剂在动态条件下进行了Na，K，Са，Mg，Al，Si，Ti，Cr，Mn，Fe，Ni，Cu和Zn杂质溶液的去除。吸附作用可确保从LiHCO ₃溶液中深度去除Ca，Cu和Zn杂质。建议了通过在亚氨基羧酸吸附剂上进行离子交换纯化LiHCO ₃溶液，然后在沸点下将纯化的溶液热分解以获得碳酸锂沉淀物的方法来制备高纯度碳酸锂。得到主要成分含量为99.90±0.05重量％的碳酸锂。