发明名称 |
RECOVERING POLY(ARYLENE SULFIDE) OLIGOMERS FROM A POLY(ARYLENE SULFIDE) REACTION MIXTURE |
摘要 |
Poly(arylene sulfide) oligomers are recovered in a process comprising steps of: (a) dehydration of an aqueous admixture of alkali metal hydroxide such as sodium hydroxide, and alkali metal bisulfide such as sodium bisulfide, in a polar organic solvent such as N-methyl-2-pyrrolidone (NMP), wherein the molar ratio of alkali metal hydroxide to alkali metal bisulfide is about 0.90:1 to about 1.05:1 prior to dehydration and 0.99:1 to about 1.05:1 after dehydration; (b) reaction of at least one polyhalo-substituted aromatic compound such as p-dichlorobenzene with the mixture from step a) under polymerization conditions to produce a reaction mixture; (c) addition of a phase separation agent such as water, to the reaction mixture to produce a phase-separated poly(arylene sulfide) mixture; (d) cooling the mixture from step (c) to produce a slurry of particulate poly(arylene sulfide) and poly(arylene sulfide) oligomers in a liquid; (e) separating particulate poly(arylene sulfide) from the slurry of step (d) leaving a dispersion of poly(arylene sulfide) oligomers in a liquid; and (f) filtering the dispersion of step (e) to recover the poly(arylene sulfide) oligomers therefrom. |
申请公布号 |
CA1278317(C) |
申请公布日期 |
1990.12.27 |
申请号 |
CA19870554199 |
申请日期 |
1987.12.14 |
申请人 |
PHILLIPS PETROLEUM COMPANY |
发明人 |
NESHEIWAT, AFIF M.;SENATORE, GUY;SHERK, FRED T. |
分类号 |
C08G75/02;C08G75/06;C08G85/00 |
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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