1070.    ---------------.  [FOSTER, A. L.] Hypersorption.  Oil Gas Jour., vol. 47, No. 15, 1948, pp. 90, 93, 94, 97, 99, 100.

        This process, developed by Union Oil Co. of California, employs the principle of selective adsorption of hydrocarbons by a moving bed of activated C particles, with subsequent removal of the adsorbed hydrocarbons by heat and steam.  It has been applied especially to recovery of C₂H₄ and the like from natural gas and cracked gas where high recoveries and high concentrations of the products are desired.  The Dow Chemical Co. has a unit at Midland, Mich., designed to process a maximum of 1,800,000 cu. ft. of cracked gases per day.  It will circulate up to 32,000 lb. of C per hr. and will strip the C at 500° F. or higher.  From a feed containing about 6% C₂H₄, 98-99% was recovered in a CO₂-free purity of about 95%.  In separating H₂ from a charge containing 52.2% H₂, 43.5% CH₄, and small amounts of C₂ and C₃, the discharge has showed 100% H₂, with 91% CH₄ and virtually no H₂ in the make gas.  Operations to concentrate C₃H₈ show results of 99.2% of C₃H₈ in the make gas from charge containing 28.8% C₃.