Process for removing hydrogen sulfide from gases particularly coal pyrolysis gases

Patent · Tue Feb 12 00:00:00 EST 1985

OSTI ID:5465897

Ritter, H; Herpers, E T

Hydrogen sulfide is first removed by ammoniacal liquor from coke oven gas in the bottom part of a gas scrubber. In the top part of the scrubber, two consecutively-arranged fine scrubbing stages remove hydrogen sulfide by treating the gases, in the upper stage, with a caustic soda solution or a caustic potash solution. Beneath the upper scrubbing stage is the second fine scrubbing stage fed with a subflow of an aqueous carbonate solution collecting at the outlet of the upper fine scrubbing stage and a subflow of cooled, regenerated carbonate solution discharged from the hydrogen-sulfide/hydrogen-cyanide stripper. From the hydrogen-sulfide/hydrogen-cyanide stripper, a second subflow is admixed with coal liquor for removing fixed ammonia therefrom in a separator. The separator produces water vapor with carbon dioxide vapors that are delivered to the hydrogen-sulfide/hydrogen-cyanide stripper for regenerating the aqueous carbonate washing solution.

• Assignee: Dr.C. otto and Comp. GmbH (Germany, Federal Republic of)
• Patent Number(s): US 4499060
• OSTI ID: 5465897
• Resource Relation: Patent Priority Date: Priority date 4 Feb 1983, Germany, Federal Republic of (F.R. Germany); Other Information: PAT-APPL-463678
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL GAS
DESULFURIZATION
SCRUBBING
HYDROCYANIC ACID
REMOVAL
HYDROGEN SULFIDES
SCRUBBERS
DESIGN
AIR POLLUTION CONTROL
AMMONIUM COMPOUNDS
CARBONATES
COKE OVENS
SEPARATION EQUIPMENT
SODIUM COMPOUNDS
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
CYANIDES
EQUIPMENT
FLUIDS
GASES
HYDROGEN COMPOUNDS
INORGANIC ACIDS
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SULFIDES
SULFUR COMPOUNDS
010401* - Coal & Coal Products- Carbonization- (-1987)
010500 - Coal
Lignite
& Peat- Products & By-Products