Method for manufacture of stylene monomer

Abstract

A method for producing a styrene monomer capable of suppressing the reduction in the production volume of styrene per unit time is provided. The present disclosure relates to a method for producing a styrene monomer, including a mixed liquid preparation step of preparing a mixed liquid by mixing a styrene-based resin composition containing a styrene-based polymer that includes styrene monomer units with a solvent to prepare a mixed liquid, a purification step of purifying the mixed liquid using a purifier; a devolatilization step of devolatilizing the purified mixed liquid to obtain a fluid, and a first thermal decomposition step of thermally decomposing the fluid to produce a first thermal decomposition liquid.

Dependencies are inferred from the claim text.