公开(公告)号：US20180290100A1

公开(公告)日：2018-10-11

申请号：US15570645

申请日：2016-04-28

Applicant: PROSERNAT

Inventor： Emile FILLATRE ,  Gauthier PERDU ,  Benoit MARES

IPC: B01D53/14 ,  C01B17/04 ,  C10L3/10

CPC classification number: B01D53/1418 ,  B01D53/1406 ,  B01D53/1425 ,  B01D53/1468 ,  B01D53/1487 ,  B01D2251/30 ,  B01D2251/606 ,  B01D2251/61 ,  B01D2252/20431 ,  B01D2252/20489 ,  B01D2252/2056 ,  B01D2252/602 ,  B01D2256/22 ,  B01D2256/245 ,  B01D2257/7022 ,  B01D2257/7027 ,  C01B17/0408 ,  C01B17/0417 ,  C01B17/043 ,  C10L3/101 ,  C10L3/103 ,  C10L3/104 ,  C10L2290/12 ,  C10L2290/541

Abstract: The present invention is directed to a process for the removal of aromatic hydrocarbons from a lean acid gas containing less than 20 mol. % of H2S, comprising:a) contacting the lean acid gas stream (1) with a H2S-selective liquid absorbent solution (29) in a first absorption zone (2) to produce a gas stream depleted in H2S (3) and an absorbent solution enriched in H2S (4),b) introducing the absorbent solution (4) into a non-thermic stripping zone (8) where it is contacted with a stripping gas stream (7) to obtain an absorbent solution depleted in C4+ aliphatic and aromatic hydrocarbons (9) and a stripping gas stream enriched in aromatic and C4+ aliphatic hydrocarbons (10),c) contacting the stripping gas stream (10) obtained in step b) with a H2S-selective liquid absorbent solution (28) in a second absorption zone (12) to obtain a stripping gas stream depleted in H2S (13), and an absorbent solution enriched in H2S (14)d) introducing the absorbent solution (9) obtained in step b) into a desorption zone (16) wherein the H2S-selective liquid absorbent solution (17) is recovered and a lean acid gas is produced.