Supported double-active-center polyethylene catalyst, preparation method and applications thereof

• Main Authors: YAN JIE, MA YUE, FAN DAPENG, LI LIUZHONG, CHENG RUIHUA, LIU BAIPING
• Format: Patent
• Language: Chinese; English
• Published: 13.03.2018
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOSITIONS BASED THEREON; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention relates to a polyethylene catalyst, particularly to a supported double-active-center polyethylene catalyst, a preparation method and applications thereof. The supported double-active-center polyethylene catalyst comprises an inorganic carrier and two supported active components, wherein the two active components comprise a chromium oxide and a manganese oxide, the total chromium loading amount accounts for 0.01-5% of the total weight of the catalyst (calculated as the weight of Cr), the manganese loading amount accounts for 0.01-5% of the total weight of the catalyst (calculatedas the weight of Mn), and the inorganic carrier has the pore volume is 0.5-5 cm /g, the surface area of 100-600 m /g, and the average particle size of 1-100 [mu]m. According to the present invention, the catalyst has advantages of high catalytic activity, high hydrogen-adjusting sensitivity, good copolymerization performance, good hydrogen-adjusting response, excellent alpha-olefin copolymerization performance, wide molec