Catalytic system for preparation of wide-distribution polyolefin, and application of catalytic system

The invention relates to a catalytic system for preparation of wide-distribution polyolefin, and application of the catalytic system. The catalytic system comprises a solid catalyst component (A), a cocatalyst (B) and a first external electron donor (ED1), wherein the component (A) is a magnesium ha...

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Hauptverfasser: ZHANG CHENG, MA LIANGXING, WANG DUJIN, LI HUAYI, LI QIAN, ZHAO HUANQUN
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention relates to a catalytic system for preparation of wide-distribution polyolefin, and application of the catalytic system. The catalytic system comprises a solid catalyst component (A), a cocatalyst (B) and a first external electron donor (ED1), wherein the component (A) is a magnesium halide loaded Ti solid component and contains a composite internal electron donor (ID); the first external electron donor (ED1) is selected from one or more of compounds as shown in a general formula (1), (the formula is as shown in the description); and the R1 is selected from C1-C6 alkyl, C3-C8 naphthenic base, C6-C14 aryl or C6-C14 ceteroary, R2 is selected the formulas as shown in the description, and R3 is selected from OR1, R2, C1-C6 alkyl and C3-C8 naphthenic base. When being applied to olefin polymerization, the catalytic system has various advantages: catalytic activity and hydrogen sensitivity are high; and the polymerization product is high in isotactic index, wide in molecular weight distribution and high