公开(公告)号：EP0517183A3

公开(公告)日：1993-01-20

申请号：EP92109376.1

申请日：1992-06-03

申请人： Himont Incorporated ,  SPHERILENE S.r.l.

发明人： Covezzi, Massimo ,  Galli, Paolo ,  Govoni, Gabriele ,  Rinaldi, Roberto

IPC分类号： C08F10/00 ,  C08F2/34 ,  C08F297/08

CPC分类号： C08F10/00 ,  C08F210/16 ,  C08F4/6492 ,  C08F2/001

摘要： Process for the gas-phase polymerization of olefins of the formula CH₂=CHR in which R is hydrogen or an alkyl or aryl radical with 1 to 8 carbon atoms carried out in one or more reactors having a fluidized or mechanically agitated bed, using a catalyst obtained by reaction of a titanium halide or haloalcoholate and optionally an electron-donor compound supported on an active Mg dihalide with an Al-trialkyl compound and optionally an electron-donor compound, comprising the steps of: a) contacting the catalyst components in the absence of the olefin; b) prepolymerizing propylene or mixtures of propylene with minor amounts of ethylene or an alpha-olefin to form a propylene polymer with an insolubility in xylene of at least 60% by weight, in an amount of from 0.5 to 1000 g per g solid catalyst component; and c) polymerizing one or more CH₂=CHR olefins in the gas phase in the presence of the prepolymer-catalyst system obtained in b) while maintaining in the gas phase an alkane in a molar concentration with respect to the olefin of from 20 to 80%.

公开(公告)号：EP0517183A2

公开(公告)日：1992-12-09

申请号：EP92109376.1

申请日：1992-06-03

申请人： Himont Incorporated ,  SPHERILENE S.r.l.

发明人： Covezzi, Massimo ,  Galli, Paolo ,  Govoni, Gabriele ,  Rinaldi, Roberto

IPC分类号： C08F10/00 ,  C08F2/34 ,  C08F297/08

CPC分类号： C08F10/00 ,  C08F210/16 ,  C08F4/6492 ,  C08F2/001

摘要： Process for the gas-phase polymerization of olefins of the formula CH₂=CHR in which R is hydrogen or an alkyl or aryl radical with 1 to 8 carbon atoms carried out in one or more reactors having a fluidized or mechanically agitated bed, using a catalyst obtained by reaction of a titanium halide or haloalcoholate and optionally an electron-donor compound supported on an active Mg dihalide with an Al-trialkyl compound and optionally an electron-donor compound, comprising the steps of: a) contacting the catalyst components in the absence of the olefin; b) prepolymerizing propylene or mixtures of propylene with minor amounts of ethylene or an alpha-olefin to form a propylene polymer with an insolubility in xylene of at least 60% by weight, in an amount of from 0.5 to 1000 g per g solid catalyst component; and c) polymerizing one or more CH₂=CHR olefins in the gas phase in the presence of the prepolymer-catalyst system obtained in b) while maintaining in the gas phase an alkane in a molar concentration with respect to the olefin of from 20 to 80%.

摘要翻译： 用于CH 2 = CHR的烯烃的气相聚合方法，其中R是氢或具有1至8个碳原子的烷基或芳基，在具有流化床或机械搅拌床的一个或多个反应器中进行，使用催化剂 通过卤化钛或卤代醇化物和任选的负载在活性Mg二卤化物上的电子给体化合物与Al-三烷基化合物和任选的电子给体化合物反应获得，包括以下步骤：a）在不存在的情况下使催化剂组分接触 的烯烃; b）预聚丙烯或丙烯与少量乙烯或α-烯烃的混合物以形成在二甲苯中不溶于至少60重量％的丙烯聚合物，其量为每克固体催化剂组分0.5-1000g ; 和c）在b）中得到的预聚物 - 催化剂体系的存在下，在气相中聚合一种或多种CH 2 = CHR烯烃，同时保持在气相中相对于烯烃的摩尔浓度为20-80的烷烃 ％。

公开(公告)号：EP0525767A1

公开(公告)日：1993-02-03

申请号：EP92113006.8

申请日：1992-07-30

申请人： Himont Incorporated

发明人： Govoni, Gabriele ,  Covezzi, Massimo

IPC分类号： C08F297/08 ,  C08F2/34

CPC分类号： C08F297/083 ,  C08L53/00

摘要： Process for the preparation of LLDPE with improved processability by gas phase polymerization performed in two or more reactors, wherein, whatever the order, in one of the reactors a mixture of ethylene and an alpha-olefin CH 2 = CHR, where R is an alkyl having 1-10 carbon atoms, is polymerized to yield a copolymer containing up to about 20% by mole of the alpha-olefin, and in another reactor a mixture of propylene and an alpha-olefin CH 2 =CHR', where R' is an alkyl radical having 2-10 carbon atoms, is polymerized to yield a copolymer containing from 5 to 40% by weight of said olefin, in an amount of 5-30% with respect to the total polymer weight and the polymer-catalyst system obtained in the first reactor is fed to the other reactors.

摘要翻译： 通过在两个或更多个反应器中进行的气相聚合制备具有改进加工性能的LLDPE的方法，其中无论在一个反应​​器中的任何一个顺序，乙烯和α-烯烃CH 2 = CHR的混合物，其中R是具有 1-10个碳原子聚合，得到含有至多约20摩尔％α-烯烃的共聚物，在另一个反应器中，丙烯和α-烯烃CH2 = CHR'的混合物，其中R'是烷基 将具有2-10个碳原子的基团聚合，得到含有5-40重量％所述烯烃的共聚物，相对于总聚合物重量为5-30％，并且所得聚合物 - 催化剂体系 将第一反应器送入其它反应器。