Prepn process of polypropylene catalyst

一种聚丙烯催化剂制备方法

The present invention features applying ultrasonic technology in the preparation process of polypropylene catalyst. The preparation process includes the following steps: mixing anhydrous MgCl2, organic alcohol and inert solvent, inserting ultrasonic probe into the reactor, heating to 120-150 deg.c, turning on the ultrasonic unit while tuning the ultrasonic wave frequency to 20-50 KHz, adding phenyl anhydride and organic silicide and reaction for 1-5 hr to obtain alcoholate; adding the alcoholate cooled to room temperature into titanium compound solution cooled to -40 deg.c to -15 deg.c, heating to 90-110 deg.c, adding ester and reaction at 100-130 deg.c for 1-3 hr, and filtering to separate out solid catalyst grain. Applying ultrasonic wave technology in preparing polypropylene catalyst can raise the polymerizing activity of the catalyst and the bulk density of the polymer.