Method for Preparing Olefin-Based Elastomer

Abstract

Provided is a method for preparing an olefin-based elastomer including: supplying a cycle stream including an unreacted olefin comonomer and a residual solvent, a solvent stream including a solvent, and a comonomer stream including an olefin comonomer to a distillation column; obtaining an upper discharge stream from the distillation column including a low-boiling point component, a lower discharge stream from the distillation column including a high-boiling point component, and a side discharge stream from the distillation column including an olefin comonomer and the solvent, by distillation performed in the distillation column; supplying the side discharge stream from the distillation column and a monomer stream including an olefin monomer to a polymerization reactor and performing copolymerization to obtain a discharge stream from the polymerization reactor including an olefin-based elastomer solution; and supplying the discharge stream from the polymerization reactor including the olefin-based elastomer solution to a flash drum to obtain an olefin-based elastomer.

Dependencies are inferred from the claim text.