Absorbent for the selective removal of hydrogen sulfide

US10617993B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Gerald Vorberg · Ludwigshafen, DE
• Ralf Notz · Ludwigshafen, DE
• Thomas Ingram · Keller, US
• Georg Sieder · Bad Dürkheim, DE
• Torsten Katz · Ludwigshafen am Rhein, DE
• Christian Gruenanger · Mannheim, DE
• Peter Deglmann · Ludwigshafen, DE

Key dates

• Filing date: Sep 28, 2016
• Grant date: Apr 14, 2020
• Expiry date: Oct 2, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02C20/40
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An absorbent for selective removal of hydrogen sulfide from a fluid stream comprises an aqueous solution comprising a) a tertiary amine; b) an aminic pH promoter selected from the compounds mentioned in the description; where the molar ratio of b) to a) is in the range from 0.05 to 1.0; and c) an acid having a pKA of less than 6 in such an amount that the pH of the aqueous solution measured at 120° C. is 7.9 to less than 8.8. Also described is a process for removing acidic gases from a fluid stream, in which the fluid stream is contacted with the absorbent. The absorbent is notable for a low regeneration energy.