process is based on ion exchange principle. The
rinse water from the drag out tank is pumped into
ion exchange column which contains acidic cation
exchange resin characterised by high capacity
and good chemical resistence and physical stability.
the resins exchange hydrogen ions and Nickel ions
are retained on the resin. After some time the
resin gets saturated with Nickel ions. This is
the time to stop passing further Nickel solution
and regenerate the resin with 10% Pure Sulphuric
or Hydrochloric acid. After regeneration of the
ion exchange resin, the process can be used again.
the regenerated solution will contain Nickel ions
in the form of Nickel Sulphate or Nicke Chloride.
All brighter and its breakdown products are also
removed, leaving the regenerated solution freee
from organic contamination. This solution can
be returned to the plating tanks. Since the recovered
Nickel solution will be free from brighteners
and organic impurities, it can be safely added
tot the Semi-Bright Nickel Solution and tri-Nickel