Method fo the preparation of a catalyst suitable for the polymerisation of an olefin
Патенты
| Язык: |
Английский |
| Тип: |
Патент на изобретение |
| Номер (11) |
EP 830391 B1 |
| Номер заявки (21): |
906908385.6 |
| Дата подачи заявки (22): |
9 апр. 1996 г. |
| Дата начала отсчета срока действия патента (24): |
|
| Дата публикации патента (44,45,46): |
16 июн. 1999 г. |
| Дата публикации заявки (43): |
|
The invention relates to a method for the preparation of a catalyst suitable for the polymerisation of an olefine by contacting a magnesium compound with a halogenized Ti compound, characterised in that the magnesium compound is obtained by: a) contacting metallic magnesium with an aromatic halide RX, where R is an aromatic group containing from 6 to 20 carbon atoms and X is a halide, whereupon the dissolved reaction product I is separated from the solid residual products and then b) adding an alkoxy group or aryloxy group-containing silane compound to the obtained reaction product I at a temperature of from -20 to 20 °C, whereupon the precipitate formed is purified to obtain reaction product II, which subsequently during a step c is contacted with TiCl4 as halogenized Ti compound and is purified to obtain a catalyst.