PROCESS FOR ION-EXCHANGE PURIFICATION OF SEWAGE AND INDUSTRIAL SOLUTIONS FROM COPPER AND NICKEL IONS Russian patent published in 1995 - IPC

FIELD: ion-exchange purification of solutions. SUBSTANCE: the solution to be purified is passed through a column charged with a mixture of aminocarboxyl cationite in saline or hydrogen saline form and polymerization-type low basic anionite in hydroxyl or hydroxyl saline form in a (0.5-1.5):1 ratio by volume, the aminocarboxyl cationite being used in Kat⁺- or Kat⁺/H⁺- form in which Kat⁺ is an alkali metal or ammonium ion in OH^- or OH^-/An^--form in which An^- is a mineral acid anion. EFFECT: more efficient purification process. 2 cl, 1 tbl