METHOD OF SEPARATION OF GASES AND DEVICE FOR ITS REALIZATION Russian patent published in 1997 - IPC

FIELD: chemical industry. SUBSTANCE: the method of reduction of ethane, ethylene, propane, propylene and components of heavier hydrocarbons from flow of hydrocarbon gas consists in separation of the source flow into parts, one of which is cooled down to complete condensation, and after that it is expanded to the pressure of the fractionating tower, then heated and fed for fractionation to the middle of the column. Another part is expanded to the column pressure and also fed to the column. Part of the flow of residual gas is carried from the upper part of the column to the recirculation circuit, where it is compressed, cooled down and after expansion fed to the column above the point supply of the other parts. EFFECT: facilitated procedure. 26 cl, 10 dwg , 7 tbl