Nitrogen refrigerated process for the recovery of c2 +...

Details Nitrogen refrigerated process for the recovery of c2 +... Nitrogen refrigerated process for the recovery of c2 +...

F - Mech Eng,Light,Heat,Weapons

25

J

F25J 3/00 (2006.01) F25J 3/02 (2006.01) F25J 3/06 (2006.01)

Patent

CA 2344488

C2 and C3 hydrocarbons, particularly ethylene and propylene, are recovered from refinery or petrochemical plant gas mixtures by cooling and fractionating a feed gas mixture containing these hydrocarbons and lighter components. Refrigeration for the process is provided by a closed-loop gas expander refrigeration process cycle which preferably uses nitrogen as the recirculating refrigerant. Cooling and fractionation may be effected in a dephlegmator.

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