Simultaneous removal of water and hydrogen sulphide from...

Details Simultaneous removal of water and hydrogen sulphide from... Simultaneous removal of water and hydrogen sulphide from...

C - Chemistry, Metallurgy

01

B

23/344

C01B 31/20 (2006.01) B01D 53/14 (2006.01) B01D 53/26 (2006.01)

Patent

CA 1205981

A B S T R A C T SIMULTANEOUS REMOVAL OF WATER AND HYDROGEN SULPHIDE FROM GASEOUS CARBON DIOXIDE An improved process for simultaneously removing H2O and H2S from gas streams containing predominantly CO2 by: (a) contacting the gas feed stream in an absorption zone with a diethylene glycol, triethylene glycol and/or tetraethylene glycol absorbent to produce a CO2-rich gas and a loaded H2S-rich liquid absorbent; (b) flashing the loaded absorbent to remove a major portion of the CO2 which is recycled to the absorber; (c) flashing the semi-loaded solvent at least once, and preferably two or more times, to remove a major portion of the H2S, to produce a semi-lean absorbent; and (d) regenerating the semi-lean absorbent and returning same to the absorption zone. AMRH04

454435

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