Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component
Patent
1997-08-07
1998-10-13
Langel, Wayne
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Carbon dioxide or hydrogen sulfide component
95161, 95173, 95174, 423226, 423228, 423229, B01D 1900, B01D 5314, C01B 1716, C01B 3120
Patent
active
058208372
ABSTRACT:
A treatment method for removing acid gases by contacting a sour gas stream with a solvent (e.g. an organic amine) which absorbs H.sub.2 S in preference to CO.sub.2 and hydrocarbons. The rich solvent is then regenerated by selectively separating the absorbed hydrocarbons in a first flash, a large portion of the CO.sub.2 in a high-temperature, low-pressure second flash tank, and the substantially all of the remaining acid gases in a high-temperature, low-pressure stripper. The regenerated solvent is recycled and the recovered acid gases are processed to recover sulphur from the H.sub.2 S. The CO.sub.2 recovered from the second tank is contacted with a second solvent to provide high-quality CO.sub.2.
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"Gas Reception Uses Modern Solvents to Reduce Emissions"; A. Pelekanou et al; 75.sup.th Annual GPA Convention; Denver, CO; Mar. 11-13, 1996.
Marjanovich Barry S.
Stang Don A.
Keen Malcolm D.
Langel Wayne
Mobil Oil Corporation
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