2148. ------. [MARTIN, H. Z.] (Standard Oil Development Co.). Removal of Carbon Dioxide From Hydrocarbon-Synthesis Tail Gas. United States Patent 2,615,909, Oct. 28, 1952. Chem. Abs., vol. 47, 1953, p. 1373.

Synthesis gas is passed through a stripper tower containing a rich solution of CO₂ in a liquid scrubbing medium, for example, an ethanolamine, aminopropanol, Na₂CO₃, or NaHCO₃, and then the CO₂-rich gas is sent to the synthesis plant. The CO₂-containing tail gases from the synthesis-plant recovery system are passed to an absorption tower where they are brought into contact with stripped liquid absorber from the stripping. The CO₂-stripped gases are discharged from the top of the absorption tower, and the gas containing CO₂ is recycled to the synthesis plant.

------. See abs. 145, 2439.