发明名称 |
Process for producing poly (arylene sulfide) |
摘要 |
<p>The application provides a process for producing a poly(arylene sulfide) comprising a dehydration step of heating and dehydrating a mixture containing an organic amide solvent (a), an alkali metal sulfide and water to control a water content in the mixture and a subsequent polymerization step of subjecting the alkali metal sulfide and a dihalo-aromatic compound to a polymerization reaction in the organic amide solvent (a), wherein hydrogen sulfide vaporized off during the dehydration step is absorbed in another organic amide solvent (b) outside a system in which the dehydration step is carried out, thereby recovering it, and the hydrogen sulfide thus recovered is reused in the polymerization reaction as a raw material for the alkali metal sulfide. The production process of the application can solve various problems attendant upon the vaporization of hydrogen sulfide and provide a poly(arylene sulfide) which undergoes little variation in melt viscosity and has stable quality.</p> |
申请公布号 |
EP0792904(A2) |
申请公布日期 |
1997.09.03 |
申请号 |
EP19970301049 |
申请日期 |
1997.02.19 |
申请人 |
KUREHA KAGAKU KOGYO KABUSHIKI KAISHA |
发明人 |
MIYAHARA, MICHIHISA;SATO, HIROYUKI;SATAKE, YOSHIKATSU |
分类号 |
C08G75/02;(IPC1-7):C08G75/02 |
主分类号 |
C08G75/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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