公开(公告)号：US10207217B2

公开(公告)日：2019-02-19

申请号：US15506635

申请日：2015-08-20

Applicant: BASF SE

Inventor： Thomas Ingram ,  Ralf Notz ,  Gerald Vorberg ,  Georg Sieder

IPC: B01D53/14 ,  B01D53/52 ,  B01D53/78 ,  B01D53/96 ,  C07C217/08 ,  C07C217/28 ,  C07C217/42

Abstract: A process for removing hydrogen sulfide and carbon dioxide from a fluid stream comprises a) an absorption step in which the fluid stream is contacted with an absorbent comprising an aqueous solution (i) of an amine of the general formula (I) in which R1, R2 and R3 are each independently selected from C1-4-alkyl and C1-4-hydroxyalkyl; each R4 is independently selected from hydrogen, C1-4-alkyl and C1-4-hydroxyalkyl; each R5 is independently selected from hydrogen, C1-4-alkyl and C1-4-hydroxyalkyl; X is OH or NH(CR1R2R3); m is 2, 3, 4 or 5; n is 2, 3, 4 or 5; and o is 0 or 1; and optionally (ii) at least one tertiary amine, where the molar ratio of (i) to (ii) is greater than 0.05; wherein at least 90% of the hydrogen sulfide is removed from the fluid stream and selectivity for hydrogen sulfide over carbon dioxide is not greater than 8, wherein a CO2- and H2S-laden absorbent is obtained; b) a regeneration step in which at least a substream of the CO2- and H2S-laden absorbent is regenerated and a regenerated absorbent is obtained; and c) a recycling step in which at least a substream of the regenerated absorbent is recycled into the absorption step a). The process allows a high level of hydrogen sulfide removal with a simultaneously high coabsorption of carbon dioxide.

公开(公告)号：US09962644B2

公开(公告)日：2018-05-08

申请号：US14980634

申请日：2015-12-28

Applicant: ExxonMobil Research and Engineering Company ,  BASF

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

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

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

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.

公开(公告)号：US20170182455A1

公开(公告)日：2017-06-29

申请号：US14980634

申请日：2015-12-28

Applicant: ExxonMobil Research and Engineering Company ,  BASF

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

IPC: B01D53/14 ,  B01D53/18

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

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.