Basf Aktiengesellschaft

Klaus Kuessner

Klaus Volkamer

Ulrich Wagner

Werner Hefner

Luise Spiske

Rudolf Irnich

Max Appl

Christof Herion

Hans-Georg Scharpenberg

Dietrich Luetzow

Ernst Fuerst

Hans J Henrici

Water is removed from a mixture containing water, CO.sub.2 and one or more amines by pervaporation by bringing the mixture into contact with one side of a membrane and removing the water-containing permeate as a vapor from the other side of the membrane.

Removal of water from a mixture of water, CO.sub.2 and amines

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.

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

Acid constituents, eg. H.sub.2 S and CO.sub.2 or their mixtures, are removed from industrial gases or natural gases by means of a washing agent which contains the methyl isopropyl ethers of polyethylene glycols. The washing can be carried out with simultaneous drying of the gas, especially in the case of natural gases, since the anhydrous ethers are able to absorb water.

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

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Frankenthal, Germany

Klaus Kuessner