Process for separation of acid gases

Details Process for separation of acid gases Process for separation of acid gases

B - Operations, Transporting

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B01D 53/14 (2006.01) C01B 3/52 (2006.01) C10K 1/12 (2006.01) C10K 1/16 (2006.01)

Patent

CA 1293850

ABSTRACT OF THE DISCLOSURE Diisopropyl ethers of oligomers of ethylene glycol having between 2 and 8 ethylene glycol moieties and an average molecular weight between 190 and 300, are more useful physical absorption solvents for the separation of acid gases than are dimethyl, diethyl, ethyl butyl, propyl butyl, dibutyl, or higher alkyl ethers of the same ethylene glycol oligomers, because of a combination of high solution capacity, high separation efficiencies, low viscosity, low gas pressure, and resistance to hydrolysis during use. The diisopropyl ether of diethylene glycol is especially advantageous for use at absorber temperatures below 0°c. Because of low viscosity, the diisopropyl ethers can often be substituted in separation equipment designed for use with chemical rather than physical solvents, thereby realizing the lower operating costs associated with physical solvents without requiring new capital investment.

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