Method for neutralizing a stream of fluid, and washing liquid for use in one such method

US6939393B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Norbert Asprion · Ludwigshafen, DE
• Christoph Grossmann · Hamburg, DE

Key dates

• Filing date: Jul 24, 2001
• Grant date: Sep 6, 2005
• Expiry date: Nov 3, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D53/1456
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A description is given of the use of an alkylenediamine of the type R1HN—X—NHR2, where X is an alkylene radical having from 2 to 9 carbons, R1 is a hydrocarbon radical having from 1 to 6 carbons and R2 is a hydrocarbon radical having from 1 to 6 carbons or is hydrogen (H) for removing sour gases from a sour-gas-containing fluid stream, and of a process for deacidifying a fluid stream of this type and a wash liquid or absorption liquid for use in such a process. According to the invention, in at least one absorption step, the fluid stream is brought into intimate contact with a wash liquid, the wash liquid comprising an aqueous amine solution which comprises at least one tertiary aliphatic alkanolamine having from 2 to 12 carbons and an activator of the above type R1HN—X—NHR2. The fluid stream which is substantially freed from sour gases and the sour-gas-loaded wash liquid are then separated from one another.