公开(公告)号：US06407184B1

公开(公告)日：2002-06-18

申请号：US09539785

申请日：2000-03-31

申请人： Shotaro Matsuda ,  Satoru Ohtani ,  Yoshiaki Kikuchi ,  Toshihiro Okano

发明人： Shotaro Matsuda ,  Satoru Ohtani ,  Yoshiaki Kikuchi ,  Toshihiro Okano

IPC分类号： C08F234

CPC分类号： B01J8/26 ,  C08F10/00 ,  C08F2/34 ,  C08F2/001

摘要： A method of multistage gas phase polymerization is provided comprising performing polymerization of a feed gas mixture at least containing ethylene gas, an &agr;-olefin gas and hydrogen gas in an upstream fluid bed reactor to thereby produce a polymer powder, recovering the thus-produced polymer powder and performing further polymerization of the polymer powder in a downstream fluid bed reactor, the downstream fluid bed reactor being continuously connected to the upstream fluid bed reactor so that the polymer powder recovered from the upstream fluid bed reactor is introduced into the downstream fluid bed reactor, which method comprises the steps of: recovering polymer powder from the upstream fluid bed reactor, treating the recovered polymer powder so as to lower the content of &agr;-olefin gas and hydrogen gas therein by contacting the polymer powder with a stream of gas comprising ethylene or an inert gas, and introducing the treated polymer powder into the downstream fluid bed reactor. By this method, &agr;-olefin gas and hydrogen gas which inhibit the polymerization reaction in the downstream fluid bed reactor and which render regulation of desired polymer product properties difficult are removed from the polymer product prior to the downstream fluid bed reactor.

摘要翻译： 提供了一种多级气相聚合方法，包括在上游流化床反应器中进行至少含有乙烯气体，α-烯烃气体和氢气的进料气体混合物的聚合，从而产生聚合物粉末，回收如此制备的聚合物 粉末并在下游流化床反应器中进一步聚合聚合物粉末，下游流化床反应器连续地连接到上游流化床反应器，使得从上游流化床反应器回收的聚合物粉末被引入下游流化床反应器 该方法包括以下步骤：从上游流化床反应器回收聚合物粉末，处理回收的聚合物粉末，以便通过使聚合物粉末与包含乙烯的气体流接触来降低其中的α-烯烃气体和氢气的含量 或惰性气体，并将经处理的聚合物粉末引入下游流化床反应 要么。 通过这种方法，在下游流化床反应器之前，从聚合物产物中除去抑制下游流化床反应器中的聚合反应并且使所需聚合物产物性质调节困难的α-烯烃气体和氢气。

公开(公告)号：US5962607A

公开(公告)日：1999-10-05

申请号：US856289

申请日：1997-05-14

申请人： Ryoichi Yamamoto ,  Toshihiro Okano ,  Mitsunori Ichimura ,  Yoshiaki Kikuchi

发明人： Ryoichi Yamamoto ,  Toshihiro Okano ,  Mitsunori Ichimura ,  Yoshiaki Kikuchi

IPC分类号： F16J15/447 ,  B01J8/18 ,  B01J8/24 ,  C08F2/00 ,  C08F2/34 ,  C08F10/00 ,  C08F210/16 ,  F04D29/16

CPC分类号： B01J8/1827 ,  B01J8/1818 ,  C08F10/00 ,  F04D29/162 ,  B01J2208/00256 ,  B01J2208/00274 ,  C08F210/16 ,  Y10S526/901

摘要： A method for vapor phase polymerization comprises blowing a gaseous monomer from a bottom of a fluidized bed reactor through a distributor plate into the reactor by means of a blower while feeding a solid catalyst into the reactor to thereby form a fluidized bed in the reactor and conducting a vapor phase polymerization to produce a polymer or copolymer, wherein the blower has a slide or rotational slide part between its discharge side as a high pressure side and its suction side as a low pressure side in a blower body casing, said slide or rotational slide part being provided with a noncontacted gas leakproof seal part at a clearance ranging from 0.7 to 2.5 mm.

摘要翻译： 气相聚合的方法包括将气态单体从流化床反应器的底部通过分配器板通过鼓风机吹入反应器中，同时将固体催化剂进料到反应器中，从而在反应器中形成流化床并导电 气相聚合以制备聚合物或共聚物，其中鼓风机在其作为高压侧的排出侧和在鼓风机主体壳体中作为低压侧的吸入侧之间具有滑动或旋转滑动部分，所述滑动件或旋转滑块 部分设置有间隙为0.7至2.5mm的非接触式气体泄漏密封部分。