| 新型钒系Ziegler-Natta乙烯聚合催化剂制备宽/双峰分布聚乙烯 |
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| 引用本文： | 王东升,赵增辉,赵成才,郎笑梅,吴伟,米克娜斯T.B.,扎哈洛夫A.V..新型钒系Ziegler-Natta乙烯聚合催化剂制备宽/双峰分布聚乙烯[J].化学与粘合,2012(2):1-4,45. |
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| 作者姓名： | 王东升 赵增辉 赵成才 郎笑梅 吴伟 米克娜斯T.B. 扎哈洛夫A.V. |
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| 作者单位： | 黑龙江大学化学化工与材料学院黑龙江省普通高校高效转化的化工过程与技术重点实验室;中国石油天然气股份有限公司大庆化工研究中心;俄罗斯科学院西伯利亚分院鲍列斯科夫催化研究院 |
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| 基金项目： | 国家科技部国际合作项目(编号:2008DFR40400) |
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| 摘 要： | 采用格氏试剂法合成了氯化镁载体,并分别担载四氯化钛和四氯化钒制备出含有钛和钒活性中心的载体型高效聚乙烯催化剂。钒系催化剂的活性与钛系催化剂相近,但是其氢调敏感性更高,而且钒系催化剂所生产的聚乙烯产品具有较宽的相对分子质量分布和较高的甲基支化密度。提出了钒系催化剂体系中形成高支化度聚乙烯的反应机理。
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| 关 键 词： | Ziegler-Natta催化剂 钒活性中心 聚乙烯 宽/双峰分布 |
A Novel Ziegler-Natta Catalyst with Vanadium Active Center for Producing Polyethylene with Broad/ Bimodal Molecule Weight Distribution |
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| Affiliation: | WANG Dong-sheng1,ZHAO Zeng-hui2,ZHAO Cheng-cai2,LANG Xiao-mei2,WU Wei1,MIKNAS T.B.3,ZACHAROV A.V.3(1.Key Laboratory of Chemical Engineering Process&Technology for High-efficiency Conversion,College of Heilongjiang Province,Sino-Russians Joint Laboratory for Catalysis,College of Chemistry and Material Sciences,Heilongjiang University,Harbin 150080,China;2.China National Petroleum Corporation,Daqing Chemical Research Institution,Daqing 163714,China;3.Boreskov Institute of Catalysis,Siberian Branch of the Russian Academy of Sciences,Novosibirsk 630090,Russia) |
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| Abstract: | The MgCl2 supporter has been synthesized using Grignard reagent method,and the efficient catalysts with titanium and vanadium active centers for producing polyethylene are prepared by loading TiCl4 and VCl4,respectively.Compared with the catalyst with titanium active center,the catalyst with vanadium active center exhibited a similar activity,but it tends to make a higher hydrogen regulating sensitivity,and the polymer produced by using vanadium catalyst provided with broad / bimodal molecule weight distribution and high degree of methyl branching.The mechanism of producing polyethylene with high methyl branching degree prepared by catalyst with vanadium active center was proposed. |
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| Keywords: | Ziegler-Natta catalyst vanadium active center polyethylene broad/ bimodal molecule weight distribution |
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