Method For Preparing Olefin Based Elastomer

Abstract: The present invention provides a method for preparing an olefin-based elastomer, the method comprising the steps of: supplying a circulation stream including unreacted olefin comonomers and residual solvents, a solvent stream including solvents, and a comonomer stream including olefin comonomers to a distillation column; obtaining a distillation column top discharge stream including low-boiling point components, a distillation column bottom discharge stream including high-boiling point components, and a distillation column side discharge stream including olefin comonomers and solvents, through distillation performed in the distillation column; supplying the distillation column side discharge stream and a monomer stream including olefin monomers to a polymerization reactor and copolymerizing same to obtain a polymerization reactor discharge stream including an olefin-based elastomer solution; and supplying the polymerization reactor discharge stream including the olefin-based elastomer solution to a flash drum to obtain an olefin-based elastomer.

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