Manufacture of ferric sulfate and hydrochloric acid from...

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

C - Chemistry, Metallurgy

01

G

C01G 49/14 (2006.01) C01B 7/01 (2006.01) C01B 7/03 (2006.01) C01B 7/07 (2006.01)

Patent

CA 2143589

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 (O2) 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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