Removal of CO.sub.2 and/or H.sub.2 S and/or COS from gases containing these constituents

US4336233A · kind A · utility

Assignee

• BASF SE

Inventors

• Max Appl · Schifferstadt, DE
• Ulrich Wagner · Bernburg, DE
• Hans J. Henrici · Mannheim, DE
• Klaus Kuessner · Heuchelheim, DE
• Klaus Volkamer · Bischofswerda, DE
• Ernst Fuerst

Key dates

• Filing date: Aug 13, 1980
• Grant date: Jun 22, 1982
• Expiry date: Aug 13, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/151
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An aqueous solution containing from 0.81 to 1.3 moles of piperazine per liter is used as a washing agent for removing impurities such as H.sub.2 S, CO.sub.2 and COS from gases. Piperazine can also be used, in amounts of up to 0.8 mole per liter, together with physical or chemical solvents, to accelerate the absorption of H.sub.2 S, CO.sub.2 and COS. The washing process is used for natural gases, coke-oven gases, gases from the gasification of coal and synthesis gases, of any origin.