Process for recovering and purifying unreacted propylene during mass
polymerization of liquid propylene
    1.
    发明授权
    Process for recovering and purifying unreacted propylene during mass polymerization of liquid propylene 失效
    在液体丙烯的大规聚合过程中回收和纯化未反应的丙烯的方法

    公开(公告)号:US4529795A

    公开(公告)日:1985-07-16

    申请号:US210220

    申请日:1980-11-25

    CPC分类号: C08F6/28

    摘要: During the recovery of the unreacted propylene from the mother liquor obtained in the polymerization of liquid propylene, the major part of the propylene is evaporated in a first evaporation step at a low temperature and the remaining part is evaporated in a second evaporator at a high temperature. In this way an early agglomerization of the atactic and/or low-molecular weight polymer dissolved in the mother liquor and fouling of the heat exchanger tubes and/or of the column trays is avoided.

    摘要翻译: 在从液体丙烯聚合中得到的母液中回收未反应的丙烯期间,丙烯的主要部分在第一蒸发步骤中在低温下蒸发,剩余部分在高温下在第二蒸发器中蒸发 。 以这种方式,可以避免溶解在母液中的无规和/或低分子量聚合物的早期团聚和热交换器管和/或塔盘的结垢。

    Process for the manufacture of a catalyst
    2.
    发明授权
    Process for the manufacture of a catalyst 失效
    制造催化剂的方法

    公开(公告)号:US4007132A

    公开(公告)日:1977-02-08

    申请号:US553810

    申请日:1975-02-27

    IPC分类号: C08F4/64 C08F10/00

    摘要: A catalyst of high activity and stereospecificity in .alpha.-olefin polymerization is obtained by subjecting titanium trichloride, prepared from titanium tetrachloride by reduction with aluminum alkyl halides, to two thermal treatments, the second one being carried out in the presence of an dialkyl ether and a cyclopolyene, and/or after-treating the solid reaction product with an aluminum alkyl halide, optionally in the presence of a small amount of a cyclopolyene and/or an olefin.

    摘要翻译: 在α-烯烃聚合中具有高活性和立体定向性的催化剂是通过将由四氯化钛制得的三氯化铝与烷基卤化铝还原,得到两种热处理,第二种在二烷基醚和 和/或使用烷基卤烷化铝任选在少量的环戊烯和/或烯烃的存在下对固体反应产物进行后处理和/或后处理。

    Process for removing catalyst residues from polyolefins
    4.
    发明授权
    Process for removing catalyst residues from polyolefins 失效
    从聚烯烃中除去催化剂残留物的方法

    公开(公告)号:US4476297A

    公开(公告)日:1984-10-09

    申请号:US407123

    申请日:1982-08-11

    IPC分类号: C08F6/02 C08F6/08

    CPC分类号: C08F6/02

    摘要: In polyolefins, the content of titanium and light metal halides and aluminum compounds emanating from the catalyst system can be considerably reduced by treatment with a higher, preferably branched, aliphatic monocarboxylic acid having 6 to 10 carbon atoms.

    摘要翻译: 在聚烯烃中,通过用具有6至10个碳原子的较高优选支化的脂肪族单羧酸处理,可以显着降低从催化剂体系发出的钛和轻金属卤化物和铝化合物的含量。

    Process for the manufacture of a catalyst
    7.
    发明授权
    Process for the manufacture of a catalyst 失效
    制造催化剂的方法

    公开(公告)号:US4008176A

    公开(公告)日:1977-02-15

    申请号:US553811

    申请日:1975-02-27

    摘要: A catalyst of high activity and stereospecificity in .alpha.-olefin polymerization is obtained when titanium trichloride, prepared from titanium tetrachloride by reduction with an aluminum alkyl halide, is thermally treated, first with an ether in the presence of a cyclopolyene and the solid reaction product is then treated with an aluminum alkyl halide in the presence of a small amount of a cyclopolyene and/or an olefin. With the catalyst obtained high space-time yields of .alpha.-olefin polymers and copolymers can be produced.

    摘要翻译: 当通过用烷基卤化铝还原形成的四氯化钛的三氯化钛进行热处理时,首先用环己烯存在下的醚和固体反应产物是热处理,得到在α-烯烃聚合中具有高活性和立体定向性的催化剂 然后在少量的环烯烃和/或烯烃的存在下用烷基卤化铝处理。 通过催化剂得到高空时收率的α-烯烃聚合物和共聚物可以生产出来。

    Process for the manufacture of a catalyst
    10.
    发明授权
    Process for the manufacture of a catalyst 失效
    制造催化剂的方法

    公开(公告)号:US4007133A

    公开(公告)日:1977-02-08

    申请号:US553813

    申请日:1975-02-27

    摘要: A catalyst of high activity and stereospecificity in .alpha.-olefin polymerization is obtained by subjecting titanium trichloride, obtained by reduction of titanium tetrachloride with aluminum alkyl halides, to two thermal treatments, the second thermal treatment being carried out in the presence of a dialkyl ether.

    摘要翻译: 在α-烯烃聚合中具有高活性和立体定向性的催化剂是通过将通过还原四氯化钛获得的三氯化钛与烷基卤化铝进行两次热处理而获得的,第二次热处理是在二烷基醚的存在下进行的。