Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component
Patent
1988-10-04
1989-06-20
Doll, John
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Carbon dioxide or hydrogen sulfide component
423242, B01D 5334
Patent
active
048407771
ABSTRACT:
A process for the purification of a gas stream containing impurities comprising (i) passing the gas stream through an aqueous solution of stabilized monoethanolamine or diethanolamine in such a manner that the impurities are absorbed into the monoethanolamine solution or diethanolamine solution to form a rich solution and (ii) regenerating the monoethanolamine or diethanolamine solvent from the rich solution so as to remove the impurities, (iii) recycling the solvent into the aqueous solution in a closed loop and introducing a stabilizer into the recirculating solvent solution in an amount of about 4 to about 25 percent by weight based on the total weight of solution, the stabilizer being methyldiethanolamine.
REFERENCES:
patent: 3535260 (1970-10-01), Singh
patent: 4461749 (1984-07-01), Thorn
Doll John
Freeman Lori S.
McBride Thomas K.
Tolomei John G.
UOP
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