Production
Hydrated forms of ferrous chloride are generated by treatment of wastes from steel production with hydrochloric acid. Such solutions are designated "spent acid," especially when the hydrochloric acid is not completely consumed:
- Fe + 2 HCl → FeCl2 + H2
The spent acid requires treatment before its disposal. It is also byproduct from titanium production, since some titanium ores contain iron.
Read more about this topic: Iron(II) Chloride
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—Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)
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