Manufacture of ferric sulfate and hydrochloric acid from ferrous

Details Manufacture of ferric sulfate and hydrochloric acid from ferrous Manufacture of ferric sulfate and hydrochloric acid from ferrous

1994-03-01

1995-05-23

Straub, Gary P.

Chemistry of inorganic compounds

Halogen or compound thereof

Hydrogen halide

423481, 423558, 423DIG1, C01B 707, C01B 701, C01G 4900

Patent

active

054179556

ABSTRACT:
A two step method of converting ferrous chloride from a pickling liquor to produce hydrochloric acid and ferric sulfate is disclosed. The ferrous chloride is first mixed with sulfuric acid to produce ferrous sulfate and HCl. The HCl is carried to an absorbtion tower where most of the HCl is collected and the remainder is returned to the reactor. The ferrous sulfate is separated from the sulfuric acid. The unreacted sulfuric acid is returned to the reactor and the ferrous sulfate is transported to a second reactor where it is reacted with sulfuric acid and air (O.sub.2) to produce ferric sulfate. The ferric sulfate is removed from the second reactor. Both reactions are carried out at relatively low temperatures under atmospheric pressures.

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