Patent · US Expired

Process of selectively desulfurizing gases

US4297330A · kind A · utility

8Cited by

4References

7Claims

0Family size

Assignee

Metallgesellschaft AG · DE

Inventors

Johann Schlauer · Schmallenberg, DE
Georg Kempf · Schöneck, DE
Alexander Doerges · Frankfurt am Main, DE

Key dates

Filing date	Mar 27, 1980
Grant date	Oct 27, 1981
Priority date	—
Expiry date	Mar 27, 2000

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/151
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

In a process of selectively desulfurizing gases which contain hydrogen sulfide and carbon dioxide comprising scrubbing the gases with an aqueous potassium carbonate solution under superatmospheric pressure and at temperatures of about 100.degree. C., regenerating the laden scrubbing solution and recycling the regenerated scrubbing solution, the improvement wherein the gases to be purified are scrubbed with an aqueous potassium carbonate solution so as to maintain a mass ratio of 1.0 to 3.0 vals (gram equivalents) of alkali in the solution per mole of CO.sub.2 and H.sub.2 S in the gases to be purified, the laden scrubbing liquor is subsequently regenerated by being stripped with a gas in which a CO.sub.2 partial pressure above 0.2 bar is maintained, and the so regenerated scrubbing solution is recycled.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.