发明名称 |
Apparatus for crystallization of polytrimethylene terephthalate |
摘要 |
The pelletized product of melt condensation polymerization of 1,3-propanediol and terephthalic acid is crystallized in a vessel designed for continuous fluidized bed flow of the pellets in water at a temperature within the range of about 65 to about 100° C. Hot-water treatment in the vessel permits crystallization of the pellets in a continuous operation and results in an increase of the crystallinity of the polymer to greater than about 35% and an increase in pellet density.
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申请公布号 |
US6461575(B1) |
申请公布日期 |
2002.10.08 |
申请号 |
US19990309921 |
申请日期 |
1999.05.11 |
申请人 |
SHELL OIL COMPANY |
发明人 |
DUH BEN;CHEN YE-MON;COREY ANN MARIE |
分类号 |
B29B9/16;C08G63/88;(IPC1-7):B01D9/00 |
主分类号 |
B29B9/16 |
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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