abstract |
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. n 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:n nwherein R is each independently a hydrogen atom, a methyl group, an ethyl group, a C 3-30 linear or branched chain hydrocarbon group, a C 3-10 alicyclic hydrocarbon group or a C 6-14 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 C 3-8 alkylene group or a C 6-14 arylene group;n nwherein R is each independently a hydrogen atom, a methyl group, an ethyl group, a C 3-30 linear or branched chain hydrocarbon group, a C 3-10 alicyclic hydrocarbon group or a C 6-14 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 C 3-8 alkylene group or a C 6-14 arylene group. |