Method for preparing a catalyst suitable for polymerizing an olefine
Patents
| Language: |
Английский |
| Type: |
Invention |
| Number |
US 6051666 A |
| Request number: |
08/948,055 |
| Request date: |
Oct 9, 1997 |
| patent.field.start_date: |
|
| Registration date: |
Apr 18, 2000 |
| patent.field.request_publication_date: |
|
A method for polymerizing at least one olefin by contacting at least one olefin with a polymerization catalyst and an organometallic compound containing a metal from group 1, 2, 12 or 13 of the Periodic System of Elements under effective polymerization conditions. The polymerization catalyst is obtained by contacting metallic magnesium with an aromatic halide, RX, under conditions effective to obtain a first reaction product and solid residual products. The first reaction product is then separated from the solid residual products. A silane compound containing an alkoxy or aryloxy group is added to the first reaction product between -20 DEG C. to 20 DEG C. to obtain a precipitate which is purified to obtain a second reaction product. Subsequently, the second reaction product is contacted with a halogenized titanium compound, such as titanium tetrachloride, to obtain a further reaction product. The polymerization catalyst is obtained by purifying the further reaction product. In the aromatic halide, R represents an aromatic group containing from 6 to 20 carbon atoms and X represents a halide.