Summer 1992
Experience with Ferric Chloride Regeneration
Introduction
As stated in other publications, e.g~ by David Allen (ReL I), the
need for recycling our chemicals rapidly rises as the
environmental regulations are tightened.
In the chemical milling industry, ferric chloride is an important
chemical which is used in relatively large quantities. Regeneration.
therefore, is very attractive as it saves primary costs as well as
waste disposal costs. Apart from the financial motives and the
responsibility for the environment, there is an advantage in
improved process control with continuous regeneration. Several
systems are known,. for instance, the chlorine system which is
used for the reel-to-reel automatic etching of shadowmasks
(Ref.2).
Dr. Hans Korsee, Stork Veco BV
