A process for recovering olefins from a feed stream, comprising: supplying the feed stream at a primary distillation pressure, including if required compressing the feed stream in a primary compression stage; distilling the feed stream at the primary distillation pressure from 7 to 11 kg/cm 2 (100 to 160 psia) in a primary distillation zone to obtain a primary overhead vapor stream enriched in ethylene and one or more ethylene-lean bottoms streams; compressing the primary overhead vapor stream in a secondary compression stage to a discharge pressure effective to provide reflux for the primary distillation tower, wherein the discharge pressure from the secondary compression stage is from 10.5 to 17.5 kg/cm 2 (150 to 250 psia); chilling the primary overhead vapor stream at a pressure less than 30 kg/cm 2 (430 psia) in a first cooling stage to recover a first partial condensate stream and a first-stage vapor effluent; refluxing the primary distillation zone with at least a portion of the first partial condensate stream; further chilling the first-stage vapor effluent to recover at least a second partial condensate stream and a second-stage vapor effluent; feeding the at least second partial condensate stream and any remaining portion of the first partial condensate stream to a demethanizer to recover a methane-rich overhead stream and a bottoms stream essentially free of methane and lighter components; fractionating the bottoms streams from the primary distillation zone and the demethanizer into respective streams consisting essentially of hydrocarbons selected from the group consisting of ethylene, ethane, propylene, propane, C 4 's, C 5+ and combinations thereof; further chilling the second-stage vapor effluent in a cold section and phase-separating the resulting mixed vapor-liquid stream in one or more stages to obtain additional condensate and a vapor tail gas stream essentially free of ethylene; and vaporizing the additional condensate to a relatively lower pressure to provide refrigeration for the condensation and to form a relatively lower pressure recycle vapor stream. supplying the feed stream at a primary distillation pressure, including if required compressing the feed stream in a primary compression stage; distilling the feed stream at the primary distillation pressure from 7 to 11 kg/cm 2 (100 to 160 psia) in a primary distillation zone to obtain a primary overhead vapor stream enriched in ethylene and one or more ethylene-lean bottoms streams; compressing the primary overhead vapor stream in a secondary compression stage to a discharge pressure effective to provide reflux for the primary distillation tower, wherein the discharge pressure from the secondary compression stage is from 10.5 to 17.5 kg/cm 2 (150 to 250 psia); chilling the primary overhead vapor stream at a pressure less than 30 kg/cm 2 (430 psia) in a first cooling stage to recover a first partial condensate stream and a first-stage vapor effluent; refluxing the primary distillation zone with at least a portion of the first partial condensate stream; further chilling the first-stage vapor effluent to recover at least a second partial condensate stream and a second-stage vapor effluent; feeding the at least second partial condensate stream and any remaining portion of the first partial condensate stream to a demethanizer to recover a methane-rich overhead stream and a bottoms stream essentially free of methane and lighter components; fractionating the bottoms streams from the primary distillation zone and the demethanizer into respective streams consisting essentially of hydrocarbons selected from the group consisting of ethylene, ethane, propylene, propane, C 4 's, C 5+ and combinations thereof; further chilling the second-stage vapor effluent in a cold section and phase-separating the resulting mixed vapor-liquid stream in one or more stages to obtain additional condensate and a vapor tail gas stream essentially free of ethylene; and vaporizing the additional condensate to a relatively lower pressure to provide refrigeration for the condensation and to form a relatively lower pressure recycle vapor stream.