| MgCl2负载β-二酮-茂型钛配合物催化乙烯聚合的研究 |
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| 引用本文： | 孙敏,许学翔,纪洪波,景振华,段启伟. MgCl2负载β-二酮-茂型钛配合物催化乙烯聚合的研究[J]. 化工进展, 2003, 22(9): 976-979 |
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| 作者姓名： | 孙敏 许学翔 纪洪波 景振华 段启伟 |
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| 作者单位： | 石油化工科学研究院,北京,100083 |
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| 摘 要： | 研究开发了一种新型非茂负载聚烯烃催化剂——CpTi(dbm)Cl2/MgCl2／THF,分析了该催化剂的结构特征，研究了该催化剂的乙烯聚合活性与催化剂的组成和结构间的关系。结果表明，用共沉淀方法制备的MgCl2具有较大的比表面积和孔体积。CpTi(dbm)Cl2同MgCl2作用后，催化剂中的CpTi(dbm)Cl2仍保持了原来的化学结构，而活化了的MgCl2也仍然基本保持原有的晶型；载体型催化剂的孔体积和比表面积随着Mg／Ti比的增加而增加；Mg/Ti比影响栽体型催化剂粒子形态、分散性以及催化活性随着Mg／Ti比增加，催化剂的粒子形态和分散性提高，催化活性线性地增加，MgCl2对Ti生成活性中心起良好的化学改性作用。
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| 关 键 词： | MgCl2 负载 β-二酮-茂型钛配合物 催化 乙烯 聚合 结构表征 |
| 文章编号： | 1000-6613(2003)09-0976-04 |
| 修稿时间： | 2003-05-13 |
MgCl2-Supported Monocyclopentadienyl Titanium Complex Containing β-Diketone Ligand for Ethylene Polymerization |
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| Sun Min,Xu Xuexiang,Ji Hongbo,Jing Zhenhua,Duan Qiwei. MgCl2-Supported Monocyclopentadienyl Titanium Complex Containing β-Diketone Ligand for Ethylene Polymerization[J]. Chemical Industry and Engineering Progress, 2003, 22(9): 976-979 |
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| Authors: | Sun Min Xu Xuexiang Ji Hongbo Jing Zhenhua Duan Qiwei |
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| Abstract: | A novel non-metallocene supported catalyst, CpTi(dbm)Cl 2/ MgCl 2/THF was prepared by co-precipitation and characterized by means of elemental analysis, XRD, BET and SEM technique. The results indicate that the Mg/Ti ratio has considerable influence on the polymerization activity and physical structure of the catalyst. The catalytic activity of polymerization increase with the Mg/Ti ratio within the experimental range, and the surface area, pore volume and flowability of the supported catalyst increase with the Mg/Ti ratio also. In supported catalyst, the chemical structure of CpTi(dbm)Cl 2 and the crystal structure of MgCl 2 are not changed. The effect of MgCl 2 to CpTi(dbm)Cl 2 is discussed, which suggest that the activity of Ti can be improved via the chemical action of Mg to Ti. |
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| Keywords: | diketone titanium complex half-metallocene MgCl 2-supported structure ethylene polymerization |
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