Patent · US Expired

Removal of CO.sub.2 and/or H.sub.2 S from gases

US4551158A · kind A · utility

57Cited by

5References

4Claims

0Family size

Assignee

BASF SE

Inventors

Eckhart Wagner · Ludwigshafen, DE
Klaus Volkamer · Bischofswerda, DE
Werner Hefner · Lampertheim, DE
Ulrich Wagner · Bernburg, DE

Key dates

Filing date	Feb 29, 1984
Grant date	Nov 5, 1985
Priority date	—
Expiry date	Feb 29, 2004

Classification

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

Abstract

CO.sub.2 and/or H.sub.2 S are removed from gases which contain CO.sub.2 and/or H.sub.2 S by means of an aqueous absorption liquid containing an alkanolamine, by a process wherein the said gas is treated, in an absorption stage, at from 40.degree. to 100.degree. C., with an aqueous absorption liquid containing from 20 to 70% by weight of methyldiethanolamine, the treated gas is taken off at the top of the absorption stage, the aqueous absorption liquid laden with CO.sub.2 and/or H.sub.2 S is taken off at the bottom of this stage and is regenerated by being let down in two or more flash stages, and the final flash stage is operated under reduced pressure and the regenerated absorption liquid is recycled to the absorption stage.

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