B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
23/344
B01D 53/34 (2006.01) B01D 53/14 (2006.01) B01D 53/48 (2006.01) B01D 53/86 (2006.01)
Patent
CA 1221223
ABSTRACT A process for treating a sulfur-containing gas stream such as the Claus process off-gases by hydrogenation of unreduced sulfur followed by selective hydrogen sulfide absorption resulting in a vent gas that can be discharged directly to the atmosphere without incineration. A gas stream containing substantial unreduced sulfur values relative to the total sulfur concentration in the stream, is passed to a hydrogenation zone along with a hydrogenous gas. The gas stream may be first passed to a hydrolysis zone within which reduced sulfur values are hydrolized to produce hydrogen sulfide and carbon dioxide and the effluent from this zone then applied to the hydrogenation zone. The feed from the hydrogenation zone is cooled and passed to an absorption zone where it is contacted with an aqueous solvent which preferentially absorbs hydrogen sulfide in the presence of carbon dioxide. The absorption solution comprises an alkaline hydrogen sulfide absorbent and an acid having a pKa of 6 or less in a concentration to protonate 0.1-22% of the alkaline absorbent. The gas stream from the absorption zone is discharged to the atmosphere without prior incineration. Specifically disclosed solvents include solutions of alkanolamines in combination with organic or inorganic acids present in an amount to protonate 2-13% of the absorbent.
464468
Ball Hubert T.
Butwell Kenneth F.
Dibble John H.
Kimtantas Charles L.
Taggart George W.
Ford Bacon & Davis Incorporated
Gowling Lafleur Henderson Llp
Union Carbide Corporation
LandOfFree
Tail gas treating process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tail gas treating process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tail gas treating process will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1306111