发明名称 |
Polyester continuous production process |
摘要 |
A process for continuously producing a polyester comprising an aromatic dicarboxylic acid or a lower alkyl ester thereof and an alkylene glycol having 2 to 4 carbon atoms as the main glycol component by recycling part or all of a distillate comprising an alkylene glycol having 2 to 4 carbon atoms recovered from a polycondensation reaction step as the main component as a raw material for the polyester. Low-boiling substances contained in the distillate are separated by flush distillation and the distillate is supplied to an ester exchange reaction step or esterification reaction step.
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申请公布号 |
US6703478(B2) |
申请公布日期 |
2004.03.09 |
申请号 |
US20010019129 |
申请日期 |
2001.12.27 |
申请人 |
TEIJIN LIMITED |
发明人 |
NAKANE MIKIO;YAMAGUCHI KENTARO;TAKENAGA FUMINORI |
分类号 |
C08G63/183;C08G63/78;(IPC1-7):C08F6/00 |
主分类号 |
C08G63/183 |
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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