Title:
PROCESS FOR PRODUCING POLYARYLENE SULFIDE AND DEVICE FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2012/008340
Kind Code:
A1
Abstract:
The disclosed process for producing a polyarylene sulfide (PAS) involves: a polymerization step of producing PAS in an organic amide solvent from a dihalo aromatic compound and a sulfur source comprising an alkali metal (hydro)sulfide; a separation step of separating the PAS particles; a countercurrent cleaning step of cleaning the PAS particles with water and/or an organic solvent, wherein a downward current consisting of a PAS-particle-containing aqueous slurry and an upward current consisting of a cleaning liquid are brought into countercurrent contact continuously; a PAS-particle re-separation step of capturing the cleaning waste liquid with a PAS-particle re-separation means equipped with a micro-slit filter, and then re-separating and discharging the PAS particles from the micro-slit filter preferably by using a backwash means; and a collecting step of collecting the discharged PAS particles. Also disclosed is a device for producing polyarylene sulfides.
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Inventors:
KIMURA TAKAYUKI (JP)
KOIZUMI TOMOYOSHI (JP)
MATSUZAKI MITSUHIRO (JP)
KOIZUMI TOMOYOSHI (JP)
MATSUZAKI MITSUHIRO (JP)
Application Number:
PCT/JP2011/065461
Publication Date:
January 19, 2012
Filing Date:
July 06, 2011
Export Citation:
Assignee:
KUREHA CORP (JP)
KIMURA TAKAYUKI (JP)
KOIZUMI TOMOYOSHI (JP)
MATSUZAKI MITSUHIRO (JP)
KIMURA TAKAYUKI (JP)
KOIZUMI TOMOYOSHI (JP)
MATSUZAKI MITSUHIRO (JP)
International Classes:
C08G75/02; C08G75/0213; C08G75/0254; C08G75/0259; C08G75/0281
Domestic Patent References:
| WO2006027985A1 | 2006-03-16 | |||
| WO2003048231A1 | 2003-06-12 |
Foreign References:
| JP2008513186A | 2008-05-01 | |||
| JP2008274294A | 2008-11-13 | |||
| JPH06192423A | 1994-07-12 | |||
| EP0594189A1 | 1994-04-27 | |||
| US20050087215A1 | 2005-04-28 | |||
| JPH0386287A | 1991-04-11 | |||
| US5143554A | 1992-09-01 | |||
| JP2003516846A | 2003-05-20 | |||
| US20030150804A1 | 2003-08-14 | |||
| JP2008513186A | 2008-05-01 | |||
| US20080025143A1 | 2008-01-31 | |||
| JP2003048231A | 2003-02-18 | |||
| JP2003516846A | 2003-05-20 | |||
| JP2008513186A | 2008-05-01 |
Other References:
See also references of EP 2594598A4
Attorney, Agent or Firm:
NOMURA Yasuhide et al. (JP)
Yasuhide Nomura (JP)
Yasuhide Nomura (JP)
Download PDF:
Claims: