ABSORBENT COMPOSITION FOR THE SELECTIVE ABSORTPTION OF HYDROGEN SULFIDE AND PROCESS OF USE THEREOF

摘要

An absorbent composition that is useful in the selective removal of hydrogen sulfide relative to carbon dioxide from gaseous mixtures that comprise both hydrogen sulfide and carbon dioxide and the use thereof. The absorbent composition includes an aqueous solvent that comprises an amine mixture, comprising an amination reaction product of tert-butylamine and a polydispersed polyethylene glycol mixture, and water with a concentration of an added strong acid to inhibit phase separation of the aqueous solvent. The operation of certain gas absorption processes can be improved by the use of the absorbent composition.

主权项

1. An absorbent composition, comprising: (a) from 75 wt. % to 98.5 wt. %, based on the total weight of said absorbent composition, of an aqueous solvent; and (b) upwardly to 5 wt. %, based on the total weight of said absorbent composition, of a strong acid, wherein said aqueous solvent comprises from 20 wt. % to 70 wt. %, based on the total weight of said aqueous solvent, of an amination reaction product of a polydispersed polyethylene glycol (PEG) mixture having an average molecular weight that is in the range of from 180 to 1000 and t-butylamine, and from 30 wt. % to 80 wt. % water, based on the total weight of said aqueous solvent.