Title:
METHOD FOR PURIFYING AND METHOD FOR PRODUCING POLYARYLENE SULFIDE
Document Type and Number:
WIPO Patent Application WO/2020/032171
Kind Code:
A1
Abstract:
Provided are a method for purifying polyarylene sulfide (PAS) with which it is possible to efficiently reduce alkali metal halides and carboxyalkylamino-group-containing compounds in the PAS by treating the alkali metal halides and carboxyalkylamino-group-containing compounds in the PAS under a lower pressure without using a strong acid, and a method for producing PAS having a low level of alkali metal halides and carboxyalkylamino-group-containing compounds in the PAS. More specifically: a method for purifying PAS, the method having a step for removing a solvent from a crude reaction product that contains PAS and is obtained by reacting a polyhaloaromatic compound and a sulfidizing agent in an organic polar solvent and obtaining a crude-PAS-containing slurry, a step for bringing the crude-PAS-containing slurry into contact with water and an oxygen-atom-containing solvent to form the crude PAS into porous particles having a specific surface area of 30 m2/g or higher, and a step for bringing the resulting porous particles into contact with carbonated water; and a method for producing PAS, the method having the aforementioned steps.
Inventors:
WATANABE HAJIME (JP)
WATANABE HIDEKI (JP)
INOUE SATOSHI (JP)
WATANABE HIDEKI (JP)
INOUE SATOSHI (JP)
Application Number:
PCT/JP2019/031355
Publication Date:
February 13, 2020
Filing Date:
August 08, 2019
Export Citation:
Assignee:
DAINIPPON INK & CHEMICALS (JP)
International Classes:
C08G75/0281
Domestic Patent References:
| WO2012070335A1 | 2012-05-31 | |||
| WO2006027985A1 | 2006-03-16 | |||
| WO2015166838A1 | 2015-11-05 | |||
| WO2003048231A1 | 2003-06-12 |
Foreign References:
| JP2005264030A | 2005-09-29 | |||
| JP2017071752A | 2017-04-13 | |||
| JPH06192421A | 1994-07-12 | |||
| JP2015040284A | 2015-03-02 | |||
| JPS51144495A | 1976-12-11 |
Attorney, Agent or Firm:
OGAWA Shinji (JP)
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