Title:
METHOD FOR PRODUCING POLYARYLENE SULFIDE, DEHYDRATION METHOD, AND DEVICE FOR PRODUCING POLYARYLENE SULFIDE
Document Type and Number:
WIPO Patent Application WO/2021/005839
Kind Code:
A1
Abstract:
This method for producing polyarylene sulfide (PAS) comprises: a polymerization step; a dehydration step; a hydrogen sulfide recovery step in which the hydrogen sulfide contained in the gas component generated by the dehydration step is absorbed by an aqueous solution of an alkali metal hydroxide and is recovered; and a condensation step for condensing the gas component generated by the dehydration step. The hydrogen sulfide recovery step is performed before the condensation step.
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Inventors:
SUZUKI KENJI (JP)
SAKABE HIROSHI (JP)
MIYAHARA MICHIHISA (JP)
SAKABE HIROSHI (JP)
MIYAHARA MICHIHISA (JP)
Application Number:
PCT/JP2020/012193
Publication Date:
January 14, 2021
Filing Date:
March 19, 2020
Export Citation:
Assignee:
KUREHA CORP (JP)
International Classes:
C08G75/025
Domestic Patent References:
| WO2003029328A1 | 2003-04-10 | |||
| WO2004060974A1 | 2004-07-22 | |||
| WO2018135372A1 | 2018-07-26 |
Foreign References:
| JPH02160833A | 1990-06-20 | |||
| JPH09286861A | 1997-11-04 | |||
| JP2015218214A | 2015-12-07 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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