Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component
Reexamination Certificate
2005-07-19
2005-07-19
Silverman, Stanley S. (Department: 1754)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Carbon dioxide or hydrogen sulfide component
C423S237000, C423S244090, C423S564000, C423S574100, C423S576800
Reexamination Certificate
active
06919059
ABSTRACT:
Oxygen or oxygen-enriched air is employed to support combustion in furnaces (16) and (26) of part of the hydrogen sulphide content of a first feed gas stream. Sulphur vapour is extracted in condenser (32) from the resulting gas mixture so as to form a sulphur vapour depleted gas stream. The sulphur vapour depleted gas stream is passed into a catalytic reduction reactor (40) in which all the residual sulphur dioxide is reduced to hydrogen sulphide. This reduced gas mixture has water vapour extracted therefrom in a quench tower (52). The resulting water vapour depleted gas stream flows to a Claus plant for treatment typically together with a second feed gas steam comprising hydrogen sulphide. Employing both furnaces (16) and (26) makes it possible to obtain effective conversions to sulphur of the hydrogen sulphide in the feed gas without having the recycle any of the water vapour depleted gas.
REFERENCES:
patent: 4780305 (1988-10-01), Steppe
patent: 5139765 (1992-08-01), Szekely
patent: 5294428 (1994-03-01), Watson
patent: 5352433 (1994-10-01), Watson
patent: 5468458 (1995-11-01), Watson
patent: 5486345 (1996-01-01), Watson
patent: 5676921 (1997-10-01), Heisel et al.
patent: 6287535 (2001-09-01), Schendel
patent: 2004/0022721 (2004-02-01), Watson et al.
patent: 0 237 217 (1987-09-01), None
patent: 0 565 316 (1993-10-01), None
patent: 1 578 002 (1980-10-01), None
patent: WO 00/10693 (2000-03-01), None
Graville Stephen Rhys
Watson Richard William
Hertzog Ardith E.
Neida Philip H. Von
Silverman Stanley S.
The BOC Group plc
LandOfFree
Process and apparatus for recovering sulphur from a gas... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process and apparatus for recovering sulphur from a gas..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and apparatus for recovering sulphur from a gas... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3383087