Exxon Research and Engineering Company

George R Chludzinski

Guido Sartori

W S Ho

Geoffrey R Say

Chang J Kim

James P Glass, Jr

George E Milliman

Michael T Melchior

Fred J Heinzelmann

Noah S Rothblatt

An alkaline absorbent composition comprising a severely hindered amino compound and an amine salt is provided. A process for the removal of H.sub.2 S from fluid mixtures using this absorbent composition to produce a very low level of H.sub.2 S in the treated fluid is also provided. The process is also suited for the selective removal of H.sub.2 S from fluid mixtures comprising H.sub.2 S and CO.sub.2.

Absorbent composition containing a severely hindered amino compound and

Acidic gases such as carbon dioxide are removed from a gaseous mixture including the acidic component by contacting the gaseous mixture in a scrubbing system with an acid absorbing solution comprising a basic alkali metal compound and an activator, during which process at least a portion of the activator is converted to cyclic urea. At least a portion of the scrubbing solution is transferred to a thermal conversion zone wherein at least a portion of the cyclic urea is converted back to the activator afterwhich the scrubbing solution is returned to the scrubbing system from the thermal conversion zone.

Process for converting cyclic urea to corresponding diamine in a gas

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South Orange, NJ, United States of America

George R Chludzinski