Process of regenerating alkali carbonate solutions formed by the desulfurization of hot gases

US4258019A · kind A · utility

Assignee

• Metallgesellschaft AG · DE

Inventors

• Heinz Hiller
• Johann Schlauer · Schmallenberg, DE
• Alexander Doerges · Frankfurt am Main, DE
• Georg Kempf · Schöneck, DE
• Vaclav Svoboda · Baden, CH
• Winfried Zeschmar · Frankfurt am Main, DE

Key dates

• Filing date: Jul 6, 1978
• Grant date: Mar 24, 1981
• Expiry date: Jul 6, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/10
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for the selective removal of hydrogen sulfide from a gas containing hydrogen sulfide and carbon dioxide wherein said gas is contacted at superatmospheric pressure with an alkali metal carbonate solution, the resultant solution which contains hydrosulfide and bicarbonate is subjected to pressure reduction, the total alkali metal bicarbonate content of the resultant solution is adjusted so that it is at least 55% of the total alkali content of the solution and the said solution is then stripped and recycled to the hydrogen sulfide absorption step.