A METHOD FOR PRODUCING AN OLEFIN POLYMERIZATION CATALYST

摘要

The present invention is directed to a process for producing a solid olefin polymerization catalyst component from an emulsion wherein the particle size of the solid catalyst or the droplet size of the emulsion is controlled. The actual size of the droplets or the solid catalyst particles is measured, or alternatively, both are measured. Then a difference between the actual size and the set point is calculated and the process is controlled based on the difference.

主权项

1. A process for producing a solid olefin polymerization catalyst component from an emulsion comprising the steps of:
(i) providing a set point for the particle size of the solid olefin polymerization catalyst component; (i) producing in an emulsification stage the emulsion comprising droplets of a dispersed phase in a continuous phase, the droplets comprising a transition metal compound; (ii) solidifying the droplets to produce the solid olefin polymerization catalyst component in a solidification stage; (iii) optionally, calculating a set point for the size of the droplets in said emulsification stage from said set point for the particle size of the solid olefin polymerization catalyst component; (iv) measuring the size of the droplets in said emulsification stage, or measuring the size of the solid olefin polymerization catalyst component in or after said solidification stage and determining a measured size for the particles or droplets from said measurement; (v) calculating a difference between said set point and said measured size; (vi) establishing a control signal based on said difference and using said control signal for adjusting at least one manipulated variable.