发明名称 |
Process and apparatus for crystallization of polytrimethylene terephthalate (PTT) |
摘要 |
Disclosed is a process for reducing the self-adhesiveness of polytrimethylene terephthalate pellets, which can be carried out in a continuous or batch manner comprising the steps of:a) introducing polytrimethylene terephthalate pellets having an intrinsic viscosity of at least about 0.4 dl/g into a conduit containing a liquid which is moving through the conduit, thereby causing the pellets to move through the conduit with the liquid;b) adjusting the temperature of the pellets and the liquid to a temperature of about 50 to about 95° C. for a time sufficient to induce a degree of crystallinity of at least about 35% in the pellets; andc) separating the pellets from the liquid.
|
申请公布号 |
US6740733(B2) |
申请公布日期 |
2004.05.25 |
申请号 |
US20020303477 |
申请日期 |
2002.11.25 |
申请人 |
SHELL OIL COMPANY |
发明人 |
LEE JAMES GAO;DE LELLIS THOMAS LOUIS;DENTON EDWARD JAMES;ALLEN KEVIN DALE;DEISS STEFAN;MACKENSEN KLAUS |
分类号 |
C08G63/183;C08G63/88;(IPC1-7):C08F6/00 |
主分类号 |
C08G63/183 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|