NICKEL RECOVERY PROCESS

摘要

The invention relates to a process for recovering nickel from industrial effluents, characterized in that a) the effluent loaded with nickel is allowed to settle in a corrugated-plate separator (1) for the removal of solid constituents contained therein, b) a flocculant is added and the mixture is neutralized with alkali or mineral acid, c) after flocculation, the mixture is again allowed to settle in a corrugated-plate separator (3) and d) filtered through a sand filter (4), e) the filtered effluent is passed through a sequestering cation exchanger system containing three exchanger columns, the first column (5) being loaded up to breakthrough of nickel, the second column (6) serving as a guard filter and the third column (7) being regenerated or standing by in the freshly regenerated state, f) the particular column loaded with nickel is regenerated with dilute mineral acid, and g) the regenerate is treated with sodium hypophosphite in the presence of catalytic quantities of sodium borohydride, and to equipment for carrying out this process.