| 摘要 |
<p>The invention relates to a method for preparing a particulate carrier for an olefin polymerization procatalyst comprising a transition metal compound reacted for a carrier. In the method a melt Mg Cl2-CH5OH-complex is provided containing in the average 3.3 to 5.5 C2H5OH-molecules as per each MgCl2-molecule, the melt MgCl2-complex is sprayed through a nozzle dispersing it into a chamber, wherein a particulate carrier is formed of it and the ready particulate carrier is removed from the chamber. In the methods known so far difficulties have been encountered in endeavours to produce a carrier having an optimal C2H5OH content. In this invention the problems have been solved by removing by the aid of heat so much C2H5OH from the MgCl2-CH5OH-complex in connection with the spraying that the particulate carrier obtained will continue at the average 2.0 to 3.2 C2H5OH molecules as per each MgCl2 molecule. Such a carrier has a suitable C2H5OH content and a good morphology and spraying it does not raise any difficulties.</p> |
