Patent ID: 9670323
Date: 2017-06-06
CPC Classifications: B01J,C08G

Claim:
1. An apparatus for producing polyarylene sulfides including at least one repeat unit in accordance with the general formula I (where A represents a bivalent aromatic radical) produced by condensation polymerization of a di-iodized aromatic compound in accordance with the general formula II using a sulfidation agent, comprising a) a precondensation stage comprising an agitating tub or a cascade of agitating tubs composed of a plurality of agitating tubs connected one after the other, wherein the agitating tub and/or the first agitating tub of the cascade of agitating tubs has at least one input possibility for the reactants, and has an outlet for the prepolymer, and downstream of the agitating tub or the cascade of agitating tubs further comprising; b) a condensation polymerization step comprising at least one condensation polymerization reactor or a cascade of a plurality of condensation polymerization reactors connected one after the other, wherein the condensation polymerization reactor and/or the first condensation polymerization reactor of the cascade of a plurality of condensation polymerization reactors has an input possibility for the prepolymers obtained from the first step and has an output possibility for the polycondensate, wherein the precondensation stage is connected to the condensation polymerization step via a product line, characterized in that the agitating tub or at least one agitating tub of the cascade of agitating tubs has at least one drainage possibility for gaseous side products and/or non-reacted reactants; the condensation polymerization reactor or at least one condensation polymerization reactor of the cascade of condensation polymerization reactors connected one after the other has at least one drainage possibility for gaseous side products and/or non-reacted reactants; wherein the at least one drainage possibility of the agitating tub or at least one tub of the cascade of agitating tubs opens into a condensation apparatus and/or a distillation column for the separation by distillation of the gaseous side products and/or non-reacted reactants; and wherein the at least one drainage possibility of the condensation polymerization reactor or at least one condensation polymerization reactor of the cascade of condensation polymerization reactors connected one after the other opens into at least one desublimator, wherein the at least one distillation column is connected downstream of the at least one desublimator, and the distillation column being connected to the at least one desublimator via a line and having a head side drain and a sump side drain.