Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component
Patent
1995-09-05
1997-09-23
Straub, Gary P.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Carbon dioxide or hydrogen sulfide component
4235731, 4235764, 4235765, B01D 5352
Patent
active
056701233
ABSTRACT:
A process for the extraction of hydrogen sulphide from a gas mixture comprises: a step (a) in which the gas mixture is passed into an aqueous acidic solution of copper sulphate under conditions which lead to the formation of copper sulphide; a gas which is highly depleted in hydrogen sulphide and an aqueous phase containing copper sulphide in suspension are recovered; a step (b) in which the copper sulphide contained in suspension in the aqueous phase from step (a) is oxidised using an oxygen-containing gas under conditions which lead to the formation of solid elemental sulphur and soluble copper sulphate from this liquid phase; and a step (c) in which the solid sulphur and the solid copper sulphide which is not transformed during step (b) are separated and at least a portion of the aqueous acidic phase containing the copper sulphate formed during step (b) is optionally recycled to step (a).
The process is used to absorb hydrogen sulphide contained in a variety of industrial gases.
REFERENCES:
patent: 3761569 (1973-09-01), Heiba et al.
patent: 4192854 (1980-03-01), Harvey et al.
patent: 5147620 (1992-09-01), Rozsa
English Translation of German Patent Document No. DE-Alt PS 350,591, published 23 Mar. 1922.
Berat Christophe
Busson Christian
Dezael Claude
Mileo Jean-Claude
Viltard Jean-Charles
Institut Francais du Pe'trole
Straub Gary P.
Vanoy Timothy C.
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