Catalyst and polymerization method for preparing high MFR polypropylene with hydrogen regulation method
A catalytic system and catalytic component technology, applied in the production of bulk chemicals, etc., can solve problems such as poor and obvious effects
Active Publication Date: 2011-10-26
INST OF CHEM CHINESE ACAD OF SCI
8 Cites 21 Cited by
AI-Extracted Technical Summary
Problems solved by technology
A catalyst system containing multiple external electron donors comprises a solid catalytic component (A), aluminum alkyl (B) and the multiple external electron donors (C); the component (A) which is a magnesium chloride loaded Ti solid component contains phthalate internal electron donors; the component (B) is aluminum trialkyl; the component (C) comprises a first type external electron donor anda second type external electron donor with a molar ratio of 1-70:30-99; the first type external electron donor is selected from dialkyl dimethoxy silicon, 9,9-bis(methoxymethyl)fluorene or 2,2-diisobutyl-1,3-dimethoxypropane or a mixture of above substances; and the second type external electron donor is selected from tetraethoxysilane, n-propenyltriethoxysilane, n-propyltrimethoxysilane, 3-halopropyltrimethoxysilane or 3-halopropyltriethyoxyl silicon or a mixture of above substances. In the presence of hydrogen, a proportion of a silane type external electron donor and a hydrogen adding amount can be regulated and controlled, and the MFR of polypropylene can be regulated and controlled in a range of 10 to 250 g/10min under the condition of high catalytic activity.
Bulk chemical production
Tetraethyl orthosilicatePolypropylene +13
- Experimental program(17)
- Comparison scheme(3)
|Isotacticity||0.107 ~ 0.985|
|Isotacticity||0.157 ~ 0.982|
Description & Claims & Application Information
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