202.    BERG, C., FAIRFIELD, R. G., IMHOFF, D. H., AND MULTER, H. J.  Hypersorption.  Oil Gas Jour., vol. 47, No. 52, 1949, pp. 95, 97, 130, 132, 135; Petrol. Refiner, vol. 28, No. 11, 1949, pp. 113-120.

                  The hypersorption process for the separation and recovery of light gases is operating in 2 commercial units, with others under construction.  A moving bed of activated carbon absorbs hydrocarbons out of lean gas streams at low pressure.  The general construction of a typical plant is described and its operation outlined.  It can be utilized for recovering C₂H₄ from refinery gas or coke-oven gas at an efficiency of 98%, recovering C₃H₈ and butanes from natural gas, purifying hydrogenation gases, and separating CO₂ and S compounds from synthesis gas.