Instructor: Dr. Istadi (http://tekim.undip.ac.id/staf/istadi ) Email: istadi ...

Purisol Process
� This process uses N-methyl-2-pyrrolidone also known as
NMP as a solvent (licensed by Lurgi).
� The solvent removes H 2S, CO 2, H2O, RSH, and
hydrocarbons and elastomers.
� The feature of this solvent is that it is highly selective for
H 2S.
� It has a boiling point of 396 o F, which is rather low to be used
in amine mixed solvents.
� Regeneration is accomplished by two strippers, where
dissolved hydrocarbons are stripped off as fuel gas nitrogen in
the first drum
� and acid gases are stripped in the second stripper;
� regenerated NMP is recycled back to the absorber.