Device for continuously producing poly(arylene sulfide) and method for continuously producing poly(arylene sulfide)

Patent metadata

Field	Value
Publication number	US-10538629-B2
Application number	US-201716089407-A
Country	US
Kind code	B2
Filing date	Feb 28, 2017
Priority date	Apr 13, 2016
Publication date	Jan 21, 2020
Grant date	Jan 21, 2020

Abstract

Provided are a device for continuously producing poly(arylene sulfide) (hereinafter, referred to as PAS) and a method for continuous PAS production with which resource savings, energy savings, and a reduction in equipment cost are rendered possible. The device for continuous PAS production according to the present invention includes a housing chamber for housing a plurality of reaction cells; wherein the housing chamber is supplied with at least an organic amide solvent, a sulfur source, and a dihalo aromatic compound. In the reaction cells, the sulfur source is polymerized with the dihalo aromatic compound in the organic amide solvent to form a reaction mixture. The reaction cells communicate with each other through a gas phase within the housing chamber. The reaction cells are sequentially connected, and the reaction mixture sequentially moves to each reaction cell.

First claim

The invention claimed is:

1. A method for continuously producing poly(arylene sulfide) by carrying out simultaneously the steps of:
supplying at least: an organic amide solvent; at least one type of sulfur source selected from the group consisting of hydrogen sulfide, alkali metal sulfides, and alkali metal hydrosulfides; and a dihalo aromatic compound to a housing chamber inside a device for continuously producing poly(arylene sulfide), the device comprising the housing chamber configured to house a plurality of sequentially connected reaction cells;
forming a reaction mixture by carrying out a polymerization reaction between the sulfur source and the dihalo aromatic compound in the organic amide solvent in at least one or more reaction cells;
removing from the housing chamber at least a portion of water inside the housing chamber through a gas phase in the housing chamber; and
sequentially moving the reaction mixture to each of the reaction cells.

2. The method according to claim 1 , wherein
at least one group or more with regard to combinations of adjacent reaction cells are sequentially connected in order from the highest maximum liquid surface level of liquid that can be accommodated by the reaction cells, and
the reaction mixture is moved by the difference in heights of the maximum liquid surface levels from a reaction cell with a higher maximum liquid surface level to the reaction cell with a lower maximum liquid surface level.

3. The method according to claim 1 , wherein
the reaction cells are sequentially connected in order from the highest maximum liquid surface level of liquid that can be accommodated by each of the reaction cells, and
the reaction mixture is sequentially moved in accordance with the order by the difference in heights of the maximum liquid surface levels from a reaction cell with a higher maximum liquid surface level to a reaction cell with a lower maximum liquid surface level.

4. The method according to claim 1 , wherein the reaction cells are connected in series.

5. The method according to claim 1 , further implementing simultaneously a step of feeding inert gas to the gas phase from a downstream side to an upstream side in the movement direction of the reaction mixture.

6. The method according to claim 1 , further implementing simultaneously the steps of:
separating and recovering, from the gas phase in the housing chamber, a portion of at least one type of reaction raw material selected from the group consisting of the sulfur source and the dihalo aromatic compounds; and
resupplying at least a portion of the separated and recovered reaction raw material to at least some of the reaction cells.

Assignees

• Kureha Corp

Inventors

• Miyahara Michihisa
• Suzuki Kenji
• Sakabe Hiroshi

Classifications

• C08G75/0213

  containing elements other than carbon, hydrogen or sulfur · CPC title

• B01J2219/0077

  inclined · CPC title

• B01J2219/00779

  Baffles attached to the stirring means · CPC title

• C08G85/00

  General processes for preparing compounds provided for in this subclass · CPC title

• C08G75/025 Primary

  Preparatory processes · CPC title