The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 22, 2022
Filed:
Jan. 02, 2019
Basf SE, Ludwigshafen, DE;
Thomas Ingram, Mannheim, DE;
Ralf Notz, Ludwigshafen, DE;
Gerald Vorberg, Speyer, DE;
Georg Sieder, Bad Duerkheim, DE;
BASF SE, Ludwigshafen, DE;
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 R, Rand Rare each independently selected from C-alkyl and C-hydroxyalkyl; each Ris independently selected from hydrogen, C-alkyl and C-hydroxyalkyl; each Ris independently selected from hydrogen, C-alkyl and C-hydroxyalkyl; X is OH or NH(CRRR); 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 CO— and HS-laden absorbent is obtained; b) a regeneration step in which at least a substream of the CO— and HS-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.