Process for selective removal of cyclic urea from hindered...

Details Process for selective removal of cyclic urea from hindered... Process for selective removal of cyclic urea from hindered...

B - Operations, Transporting

01

D

23/341

B01D 53/34 (2006.01) B01D 53/14 (2006.01)

Patent

CA 1124487

U.S. 972,500 ABSTRACT OF THE DISCLOSURE In the process of the present invention, a cyclic urea degradation product formed as a by-product of a hindered amine acid gas scrubbing process is removed from a circulating amine scrubbing solution by employing a selective precipitation of the cyclic urea followed by filtration. The selective precipitation is carried out by cooling the circulating solution to a particular temperature level such that the cyclic urea comes out of solution while the other components remain in solution.

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