Ferric chloride is used as a coagulant, mostly in the form of a liquid (40% solution), in the treatment of wastewater and sewage water (domestic and industrial). Ferric chloride is also used in PCB manufacturing. Industrially, ferric chloride is much more important than ferrous chloride.
It is produced industrially by a reaction of dry chlorine with scrap iron (direct chlorination) at high temperatures. It is also a by-product of ... Read more
