Patent ID: 9103586
Filing Date: 2015-08-11
Classification: C07C,F25J

Abstract:
1. A process to separate one or more light hydrocarbon streams comprising ethylene, ethane, and C3+ hydrocarbons into an ethylene stream, an ethane stream, and a C3+ hydrocarbon stream, comprising: feeding the one or more light hydrocarbon streams to a deethanizer; separating the light hydrocarbons in the deethanizer to form a C3+ hydrocarbon bottoms stream and a C2-rich overhead stream comprising ethylene and ethane; separating the C2-rich overhead stream in a C2-rectifier to form a first ethylene stream and an ethane-rich bottoms stream, wherein the C2-rectifier is operated without reboiling the ethylene introduced to the C2-rectifier; separating the ethane-rich bottoms stream in a C2-splitter to form a second ethylene stream and an ethane stream; and mixing the first ethylene stream and the second ethylene stream to form a combined ethylene stream.