Patent ID: 8951332
Filing Date: 2015-02-10
Classification: B01D,B01J,C22B,Y02P

Abstract:
1. A method for selectively collecting Co from an urban ore containing Co obtained by comminuting an electronic device waste, the method comprising: a first step of immersing the urban ore in a nitric acid aqueous solution to elute the Co metal contained in the urban ore, and mixing a Co ion adsorbent for adsorbing collection target Co ions with the resulting Co ion-containing liquid; a second step of separating the Co ion adsorbent from the liquid after the Co ions are adsorbed; a third step of introducing the Co ion adsorbent separated in the second step into a collection liquid that does not contain Co ions, and separating and releasing the Co ions into the collection liquid; a fourth step of separating the Co ion adsorbent from the collection liquid after the Co ions are released; and a fifth step of evaporating the collection liquid from which the Co ion adsorbent is removed in the fourth step, so as to collect the Co ions contained in the collection liquid, wherein the Co ion adsorbent mixed with the Co ion-containing liquid in the first step comprises a support having a continuously porous mesoporous monolith structure formed of large numbers of pores of substantially uniform size and shape; and a compound that has a metal ion-binding group and is chemically bound to inner surfaces of the pores, and wherein the compound that has a metal ion-binding group is pyrogallol red or 8-(4-n-dodecyl-phenylazo)-quinoxaline (DPAQ).