Recovery of C.sub.2 hydrocarbons from demethanizer overhead

Details Recovery of C.sub.2 hydrocarbons from demethanizer overhead Recovery of C.sub.2 hydrocarbons from demethanizer overhead

1979-11-09

1981-06-02

Yudkoff, Norman

Refrigeration

Processes

Circulating external gas

62 38, 62 31, F25J 302

Patent

active

042709407

ABSTRACT:
Enhanced recovery of ethane and ethylene from demethanizer overhead is obtained by subjecting the uncondensed vapor effluent from the main reflux condenser to further condensation and accompanying rectification in a dephlegmator and returning the liquid condensate from the dephlegmator to the demethanizer column. One or more of the refrigerants employed in the dephlegmator comprises vapors leaving the dephlegmator and cooled by pressure reduction.

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