Removal of acid gases by means of an absorbent comprising a stripping aid

US8523979B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Hugo Rafael Garcia Andarcia · Mannheim, DE
• Ralf Notz · Ludwigshafen, DE
• Georg Sieder · Bad Dürkheim, DE
• Oliver Spuhl · Mannheim, DE
• Hans Hasse · Kaiserslautern, DE
• Inga Toennies · Kaiserslautern, DE
• Sebastian Hoch · Kaiserslautern, DE
• Hari Prasad Mangalapally · Hanau, DE

Key dates

• Filing date: Jun 21, 2010
• Grant date: Sep 3, 2013
• Expiry date: Jun 8, 2031

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2258/06
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for removing acid gases from a fluid stream in which a) the fluid stream is treated with an absorption liquid which comprises at least one amine, a stripping aid, and water, wherein the stripping aid is selected from water-miscible liquids, the boiling temperature of which at atmospheric pressure is lower than that of water, b) the treated fluid stream is treated with a liquid aqueous phase in order to convert entrained stripping aid at least in part to the aqueous phase, c) the loaded aqueous phase is heated in order to expel the stripping aid at least in part, and d) the regenerated aqueous phase is cooled and at least in part recycled to step b). The stripping aid promotes the regeneration of the absorbent by stripping. Emissions of the stripping aid via the treated fluid stream are avoided by the treated fluid stream being scrubbed with a liquid aqueous phase.