| abstract |
The present invention relates to a method of preparing an aromatic vinyl compound-vinyl cyanide compound polymer and an apparatus for preparing the same. More specifically, the method according to the present invention includes a step of polymerizing a reaction mixture containing an aromatic vinyl compound, a vinyl cyanide compound, and an organic solvent in a reactor and a step of transferring the vaporized reaction mixture present in the upper space of the reactor to a heat exchanger via a pipe and condensing the vaporized reaction mixture. As a feature of the method according to the present invention, the condensed reaction mixture is transferred to one side of the pipe and sprayed into the pipe.nAccording to the present invention, the flow velocity of the reaction mixture vaporized in the reactor is reduced, and temperature is lowered. Accordingly, a phenomenon wherein polymer particles in a reactor are sucked into a heat exchanger is prevented, and occurrence of polymerization in the heat exchanger is suppressed. Therefore, productivity and quality may be improved. |