To provide a solid-liquid palladium ion adsorbent which has both extraction performance and selectivity of a liquid-liquid palladium extracting agent in a conventional solvent extraction method and which does not require use of an organic solvent, and methods for selectively separating and recovering palladium, using it.
Palladium is selectively separated and recovered by using a palladium ion adsorbent comprising an amide-containing cyclic sulfide compound represented by the following formula (1) or (2), or a palladium ion adsorbent having the amide-containing cyclic sulfide compound represented by the following formula (1) or (2) fixed on a carrier:
wherein R is each independently a hydrogen atom, a methyl group, an ethyl group, a C3-30 linear or branched chain hydrocarbon group, a C3-10 alicyclic hydrocarbon group or a C6-14 aromatic hydrocarbon group, m is an integer of 1 or 2, n is each independently an integer of from 1 to 12, and L is each independently a methylene group, an ethylene group, a C3-8 alkylene group or a C6-14 arylene group;
wherein R is each independently a hydrogen atom, a methyl group, an ethyl group, a C3-30 linear or branched chain hydrocarbon group, a C3-10 alicyclic hydrocarbon group or a C6-14 aromatic hydrocarbon group, n is each independently an integer of from 1 to 4, and L is each independently a methylene group, an ethylene group, a C3-8 alkylene group or a C6-14 arylene group.
提供一种固液型
钯离子吸附剂,它在传统的溶剂萃取方法中既具有液液型
钯萃取剂的萃取性能和选择性,又不需要使用有机溶剂,并提供用它选择性地分离和回收
钯的方法。
钯的选择性分离和回收是通过使用一种
钯离子吸附剂来实现的,该吸附剂包括由下式(1)或(2)表示的含酰胺环状
硫化物化合物,或一种将下式(1)或(2)表示的含酰胺环状
硫化物化合物固定在载体上的
钯离子吸附剂:
其中 R 独立地分别是氢原子、甲基、乙基、C3-30 直链或支链烃基、C3-10 脂
环烃基或 C6-14
芳烃基,m 是 1 或 2 的整数,n 独立地分别是 1 至 12 的整数,L 独立地分别是亚甲基、亚乙基、C3-8 亚烷基或 C6-14 亚芳基;
其中 R 独立地分别是氢原子、甲基、乙基、C3-30 直链或支链烃基、C3-10 脂
环烃基或 C6-14
芳烃基,n 独立地分别是 1 至 4 的整数,L 独立地分别是亚甲基、亚乙基、C3-8 亚烷基或 C6-14 芳烯基。