Method for separating volatile substances from material mixtures and device for producing polyarylene sulfides

Patent metadata

Field	Value
Publication number	US-2016355642-A1
Application number	US-201615181098-A
Country	US
Kind code	A1
Filing date	Jun 13, 2016
Priority date	Apr 30, 2012
Publication date	Dec 8, 2016
Grant date	—

Abstract

The present invention relates to a method for separating volatile substances, particularly iodine, diiodised aromatic compounds and/or mixtures thereof, from material mixtures containing said compounds. The invention further relates to a device for producing polyarylene sulphides, by means of which volatile substances, particularly iodine and diiodised aromatic compounds, can be separated from the polymers.

First claim

1 - 8 . (canceled)

9 . An apparatus for producing polyarylene sulfides including at least one repeat unit in accordance with the general formula I
A-S   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
I-A-I   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 a 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, in particular iodine and/or the compound having the general formula II; and 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, in particular iodine and/or the compound of the general formula II.

10 . The apparatus in accordance with claim 9 , wherein the at least one drainage possibility 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.

11 . The apparatus in accordance with claim 10 , the distillation column has a feedback of non-reacted reactants into the agitation tub or into the first agitation tub of the cascade of agitation tubs respectively.

12 . The apparatus in accordance with claim 10 , wherein the distillation column has a drain at the head side, the drain being connected to at least one condenser or desublimator via a supply.

13 . The apparatus in accordance with claim 9 , wherein the at least one drainage possibility opens into at least one desublimator.

14 . The apparatus in accordance with claim 13 , wherein at least one distillation column is connected downstream of the at least one desublimator, 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.

15 . The apparatus in accordance with claim 14 , wherein the head side drain
a) opens into the condenser or into the desublimator; or b) is combined with the product flow stemming from the condenser.

16 . The apparatus in accordance with claim 9 , wherein it comprises an apparatus for generating vacuum which
a) is connected to the at least one desublimator via at least one connection line; and/or b) is connected to the at least one condenser or to the desublimator via at least one connection line.

17 - 31 . (canceled)

Assignees

• Sk Chemicals Co Ltd

Inventors

• Schaferskupper Clifford
• Hille Thomas
• Jurgens Theodor
• Schumann Andre
• Gierszewski Lars
• Cha Il Hoon
• Kim Sung Gi
• Kim Yoon Cheol

Classifications

• B01J2219/24

  Stationary reactors without moving elements inside · CPC title

• C08G75/14 Primary

  Polysulfides · CPC title

• C08G75/0281 Primary

  Recovery or purification · CPC title

• B01J19/245

  placed in series · CPC title

• C08G75/0209

  derived from monomers containing one aromatic ring · CPC title