公开(公告)号：US07232878B2

公开(公告)日：2007-06-19

申请号：US10475344

申请日：2002-04-18

申请人： Gerald Mulgrew ,  Gary Lindsay Pitman

发明人： Gerald Mulgrew ,  Gary Lindsay Pitman

IPC分类号： C08F6/00

CPC分类号： C08F6/005

摘要： A process for the separation of volatile material from particulate polymer which has been substantially freed from unreacted monomer in an earlier separation step, comprising (a) feeding the particulate polymer to a purge vessel, optionally causing it to move through the vessel in substantially plug-flow mode, (b) heating the particulate polymer in the purge vessel to a temperature greater than 30° C. but insufficiently high to cause the particles to become agglomerated, and/or maintaining the polymer at a temperature in this range in the purge vessel, (c) feeding air to the purge vessel counter-current to the movement of the particulate polymer to remove volatile material therefrom, (d) removing the particulate polymer from the purge vessel. Preferably the particulate polymer fed to the purge vessel is caused to move through the vessel in substantially plug-flow mode. The process is particularly suitable for polyethylene.

摘要翻译： 一种在早期分离步骤中基本上不含未反应单体的颗粒聚合物分离挥发性物质的方法，包括（a）将颗粒状聚合物进料到清洗容器中，任选地使其以基本上堵塞的方式移动通过容器， 流动模式，（b）将清洗容器中的颗粒状聚合物加热至大于30℃的温度，但不足以使颗粒变得团聚，和/或将聚合物保持在该吹扫容器中的该温度范围内 ，（c）与微粒聚合物的运动相反地将空气送入净化容器以从其中除去挥发性物质，（d）从净化容器中除去颗粒聚合物。 进料至净化容器的颗粒聚合物最好以基本上是插塞模式移动通过容器。 该方法特别适用于聚乙烯。