Invention Grant
- Patent Title: Removal of hydrogen sulphide and carbon dioxide from a stream of fluid
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Application No.: US16238069Application Date: 2019-01-02
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Publication No.: US11278841B2Publication Date: 2022-03-22
- Inventor: Thomas Ingram , Ralf Notz , Gerald Vorberg , Georg Sieder
- Applicant: BASF SE
- Applicant Address: DE Ludwigshafen
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen
- Agency: Grüneberg and Myers PLLC
- Priority: EP14182101 20140825
- Main IPC: B01D53/14
- 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.
Public/Granted literature
- US20190134557A1 REMOVAL OF HYDROGEN SULPHIDE AND CARBON DIOXIDE FROM A STREAM OF FLUID Public/Granted day:2019-05-09
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