Method for regenerating a loaded wash liquid from a gas desulfurization facility
First Claim
1. A process of regenerating a loaded washing liquid which comes from a plant for desulfurizing a gas mixture containing hydrogen and carbon oxides, at a pressure of 10 to 100 bar and which comprises H2S, CO, H2, CO2, and nickel carbonyl and iron carbonyl, wherein the loaded washing liquid is partly expanded by a pressure difference of not less than 3 bar and a CO-containing expansion gas is released, and wherein metal carbonyls are at least partly converted to metal sulfides and metal sulfides are removed from the washing liquid, the washing liquid is passed through a hot regeneration stage and regenerated washing liquid is reused for desulfurizing, in which the gas mixture containing the hydrogen and carbon oxidesa) is contacted with a first partial stream of regenerated washing liquid in a first washing zone to form a stream of loaded washing liquid containing H2S, CO, H2, CO2 and iron carbonyl, and said first stream of loaded washing liquid is withdrawn from the first washing zone, is cooled, partly expanded to release a first CO-containing expansion gas, and a first sludge containing iron sulfide is allowed to settle in a first reaction and settling zone at a dwell time of 1 to 10 hours and sludge is withdrawn and the first stream is routed to the hot regeneration stage and b) that the gas mixture coming from the first washing zone is contacted with a second partial stream of regenerated washing liquid in a second washing zone and a second stream of loaded washing liquid which contains H2S, CO, H2, CO2 and nickel carbonyl is withdrawn from the second washing zone, the second steam is cooled, partly expanded and a second CO-containing expansion gas is released, a second sludge containing nickel sulfide is allowed to settle in a second reaction and settling zone at a dwell time of 5 to 80 minutes and sludge is withdrawn and the second stream is routed to the hot regeneration stage.
1 Assignment
0 Petitions
Accused Products
Abstract
Process for the removal of metal cabonyls before regeneration of a desulfurization wash liquid, which includes removing a part of the carbon monoxide from the wash liquid, conversion of the metal carbonyls to metal sulfides, passing the wash liquid through a reaction and settling zone, removing metal sulfide-containing sludge from the reaction and settling zone, and regenerating the wash liquid.
28 Citations
4 Claims
-
1. A process of regenerating a loaded washing liquid which comes from a plant for desulfurizing a gas mixture containing hydrogen and carbon oxides, at a pressure of 10 to 100 bar and which comprises H2S, CO, H2, CO2, and nickel carbonyl and iron carbonyl, wherein the loaded washing liquid is partly expanded by a pressure difference of not less than 3 bar and a CO-containing expansion gas is released, and wherein metal carbonyls are at least partly converted to metal sulfides and metal sulfides are removed from the washing liquid, the washing liquid is passed through a hot regeneration stage and regenerated washing liquid is reused for desulfurizing, in which the gas mixture containing the hydrogen and carbon oxides
a) is contacted with a first partial stream of regenerated washing liquid in a first washing zone to form a stream of loaded washing liquid containing H2S, CO, H2, CO2 and iron carbonyl, and said first stream of loaded washing liquid is withdrawn from the first washing zone, is cooled, partly expanded to release a first CO-containing expansion gas, and a first sludge containing iron sulfide is allowed to settle in a first reaction and settling zone at a dwell time of 1 to 10 hours and sludge is withdrawn and the first stream is routed to the hot regeneration stage and b) that the gas mixture coming from the first washing zone is contacted with a second partial stream of regenerated washing liquid in a second washing zone and a second stream of loaded washing liquid which contains H2S, CO, H2, CO2 and nickel carbonyl is withdrawn from the second washing zone, the second steam is cooled, partly expanded and a second CO-containing expansion gas is released, a second sludge containing nickel sulfide is allowed to settle in a second reaction and settling zone at a dwell time of 5 to 80 minutes and sludge is withdrawn and the second stream is routed to the hot regeneration stage.
Specification
-
- Resources
-
Current AssigneeMetallgesellschaft AG (GEA Group AG)
-
Original AssigneeMetallgesellschaft AG (GEA Group AG)
-
InventorsGrünewald, Gerhard, Zwiefelhofer, Uwe
-
Primary Examiner(s)SMITH, DUANE
-
Application NumberUS09/402,075Publication NumberTime in Patent Office1,093 DaysField of Search951/60, 951/63, 951/65, 951/66, 951/72, 951/73, 951/74, 951/76, 951/77, 951/78, 951/79, 951/81, 951/83, 951/89, 951/92, 951/93, 951/94, 951/95, 951/97, 951/98, 952/05, 952/35, 952/36, 952/34US Class Current95/173CPC Class CodesB01D 53/1425 Regeneration of liquid abso...B01D 53/96 Regeneration, reactivation ...C01B 17/20 Methods for preparing sulfi...C01B 2203/0415 Purification by absorption ...C01B 2203/0485 the impurity being a sulfur...C01B 3/52 by contacting with liquids;...C10K 1/08 by washing with liquids; Re...
