模拟镍电解液深度除铜用硅胶负载N-叔丁基羰基亚甲基新型螯合树脂的合成及吸附性能

来源期刊:中国有色金属学报(英文版)2018年第12期

论文作者:王彩霞 胡慧萍 邱雪景 程泽英 孟璐佳 祝莉

文章页码:2553 - 2565

关键词:螯合树脂;选择性吸附;深度除铜;模拟镍电解液;合成

Key words:chelating resin; selective adsorption; copper removal; simulated nickel electrolyte; synthesis

摘    要:制备一种硅胶负载N-叔丁基羰基亚甲基新型螯合树脂(Si-AMPY-1),分别采用元素分析、FT-IR谱、SEM和13C CP/MAS NMR手段对树脂进行结构表征。采用静态吸附法与动态吸附法分别研究Si-AMPY-1螯合树脂对Cu(II)和Ni(II)的吸附性能。静态吸附结果表明,Si-AMPY-1螯合树脂对Cu(II)的吸附主要为化学吸附, Si-AMPY-1螯合树脂对Ni(II)的吸附则主要为物理吸附。动态吸附结果表明,Si-AMPY-1螯合树脂具有模拟镍电解液良好的深度除铜效果,在前43 BV流出液中除铜后液的铜浓度小于3 mg/L,解吸液的铜/镍质量比为21:1,满足镍电解液深度除铜的工业要求。因此,Si-AMPY-1螯合树脂有望用于镍电解液深度除铜。

Abstract: A novel silica-supported tert-butyl 2-picolyamino-N-acetate chelating resin (Si-AMPY-1) was successfully synthesized and characterized by elemental analysis, FT-IR, SEM and 13C CP/MAS NMR. The adsorption behaviors of the Si-AMPY-1 resin for Cu(II) and Ni(II) were studied with batch and column methods. The batch experiments indicated that the Si-AMPY-1 resin adsorbed Ni(II) mainly via physisorption, while adsorbed Cu(II) via chemisorption. The column dynamic breakthrough curves revealed that the Si-AMPY-1 resin can efficiently separate Cu(II) from the simulated nickel electrolyte before the breakthrough point. Moreover, the concentration of Cu(II) in the column effluent was decreased to be less than 3 mg/L within the first 43 BV (bed volumes), and the mass ratio of Cu/Ni was 21:1 in the saturated resin, which completely satisfied the industrial requirements of the nickel electrorefining process. Therefore, it was concluded that the Si-AMPY-1 resin can be a promising candidate for the deep removal of Cu(II) from the nickel electrolyte.

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