C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 17/64 (2006.01) C01C 1/24 (2006.01)
Patent
CA 2258187
A process for continuous production of ammonium thiosulphate from H2S, SO2 and NH3 comprising steps of producing in a first absorption step a solution of ammonium hydrogen sulphite by contacting a first gas stream comprising SO2 with NH3 and an aqueous solution comprising ammonium hydrogen sulphite in one or more absorbers connected in series and withdrawing a vent gas from one of the absorbers, passing the solution produced in the first absorption step to a second absorption step in which a second gas stream comprising H2S is contacted with NH3 and an aqueous solution of ammonium thiosulphate thereby producing a solution being rich in ammonium thiosulphate.
Borden Ladner Gervais Llp
Haldor Topsoe A/s
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