公开(公告)号：US20230226483A1

公开(公告)日：2023-07-20

申请号：US18002519

申请日：2021-07-06

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Carla S. Pereira ,  Jenny P. Seagraves ,  P. Scott Northrop ,  Michael Siskin ,  Thomas Ingram ,  Gerald Vorberg ,  Martin Ernst ,  Georg K. Sieder

IPC: B01D53/14 ,  B01D53/52 ,  B01D53/62 ,  B01D53/78 ,  B01D53/96

CPC classification number: B01D53/1425 ,  B01D53/1468 ,  B01D53/1493 ,  B01D53/1475 ,  B01D53/52 ,  B01D53/62 ,  B01D53/78 ,  B01D53/96 ,  B01D2257/304 ,  B01D2257/504 ,  B01D2252/2041 ,  B01D2252/20405 ,  B01D2252/20426 ,  B01D2252/20452 ,  B01D2252/20468 ,  B01D2252/20484 ,  B01D2252/60

Abstract: Capture of hydrogen sulfide from a gas mixture may be accomplished using an aqueous solution comprising an amine. Certain sterically hindered amines may selectively form a reaction product with hydrogen sulfide under kinetically controlled contacting conditions and afford a light phase and a heavy phase above a critical solution temperature, wherein the hydrogen sulfide may be present in either phase. Upon separation of the light phase from the heavy phase, processing of one of the phases may take place to remove hydrogen sulfide therefrom. Recycling of the amine to an absorber tower may then take place to promote capture of additional hydrogen sulfide.

公开(公告)号：US12053738B2

公开(公告)日：2024-08-06

申请号：US17537654

申请日：2021-11-30

Applicant: ExxonMobil Technology and Engineering Company ,  BASF

Inventor： Carla S. Pereira ,  Michael Siskin ,  Thomas Ingram ,  Gerald Vorberg ,  Martin Ernst

IPC: B01D53/52 ,  B01D53/14 ,  B01D53/18 ,  B01D53/78 ,  C10L3/10

CPC classification number: B01D53/1493 ,  B01D53/1425 ,  B01D53/1468 ,  B01D53/18 ,  C10L3/10 ,  C10L3/103 ,  B01D2252/204 ,  B01D2252/20431 ,  B01D2252/20478 ,  B01D2252/20489 ,  B01D2257/304 ,  B01D2257/504 ,  C10L2290/542 ,  Y02C20/40

Abstract: A process for selectively separating H2S from a gas mixture which also comprises CO2 is disclosed. A stream of the gas mixture is contacted with an absorbent solution comprising one or more amines, alkanolamines, hindered alkanolamines, capped alkanolamines, or mixtures thereof. The H2S/CO2 selectivity of the absorbent solution is preferably greater than about 4.0 for an acid gas loading [mol(CO2+H2S)/mol(amine)] between about 0.2 and about 0.6, and is achieved by reducing pH of the absorbent solution.