Application of new internal electron donor catalyst in batch bulk polypropylene unit
The catalyst with alcohol ester internal donor was used in batch bulk polypropylene unit.The activity,amount of external donor,hydrogen response and product quality were investigated.The results show that the activity,stereospecificity and hydrogen response of the internal donor catalyst are higher than Ziegler-Natta catalyst A with phthalic acid ester as internal donor,which is suitable to reduce hydrogen consumption,unit propylene consumption,usage of donor and odors.Although the bulk density of product is lower and the output of single autoclave is reduced by 1.6%,the catalyst with alcohol ester internal donor is more suitable for producing the powder of MFR more than 20.0 g/10 min.