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| MgCl_2-SiO_2复合载体型Ziegler-Natta乙烯聚合催化剂 | |
| 引用本文： | 任合刚,张瑞,白鹏,曲佳燕,刘宾元,王延吉.MgCl_2-SiO_2复合载体型Ziegler-Natta乙烯聚合催化剂[J].石油化工,2011,40(7):732. |
| 作者姓名： | 任合刚 张瑞 白鹏 曲佳燕 刘宾元 王延吉 |
| 作者单位： | 1. 河北工业大学高分子科学与工程研究所,天津,300130 2. 中国石油石油化工研究院大庆化工研究中心,黑龙江大庆,163714 3. 河北工业大学化工学院绿色化工研究所,天津,300130 |
| 基金项目： | 中国石油天然气股份有限公司资助项目(0604A18-11); 高等学校博士学科点专项科研基金项目(200800800002); 河北省科技支撑计划项目(09215110D); 河北省高等学校科学技术研究指导项目(Z2010129) |
| 摘 要： | 采用相同的制备工艺,制备了4种不同SiO2加入量的MgCl2-SiO2复合载体型Ziegler-Natta催化剂,考察了SiO2加入量对催化剂的形态、结构及其催化乙烯聚合性能的影响;并用BET,SEM,XRD等方法对催化剂的形态和物性进行了表征。实验结果表明,加入SiO2可以改善催化剂的颗粒形态和均匀程度;随SiO2加入量的增加,催化剂活性降低,聚乙烯的堆密度和熔体流动指数呈先增大后趋于平稳的趋势;当m(SiO2)∶m(MgCl2)=5.0时,催化剂的形态和性能较好,聚乙烯的堆密度为0.35g/cm3,熔体流动指数(10min)为0.12g,粒径为75～750μm的颗粒的质量分数为98.67%。 |
| 关 键 词： | 氯化镁-二氧化硅复合载体 Ziegler-Natta催化剂 乙烯聚合 聚乙烯 |
MgCl2-SiO2 Supported Ziegler-Natta Catalyst for Ethylene Polymerization |
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| Ren Hegang,Zhang Rui,Bai Peng,Qu Jiayan,Liu Binyuan,Wang Yanji.MgCl2-SiO2 Supported Ziegler-Natta Catalyst for Ethylene Polymerization[J].Petrochemical Technology,2011,40(7):732. | |
| Authors: | Ren Hegang Zhang Rui Bai Peng Qu Jiayan Liu Binyuan Wang Yanji |
| Affiliation: | Ren Hegang1,Zhang Rui2,Bai Peng1,Qu Jiayan1,Liu Binyuan1,Wang Yanji3(1.Institute of Polymer Science and Engineering,Hebei University of Technology,Tianjin 300130,China,2.Daqing PetrochemicalResearch Center,Petrochemical Research Institute of CNPC,Daqing Heilongjiang 163714,3.Institute of Green ChemicalTechnology,School of Chemical Engineering & Technology,China) |
| Abstract: | Four MgCl2-SiO2 supported Ziegler-Natta catalysts were prepared in the same way.The effects of mass ratio of SiO2 to MgCl2 on the catalyst structure and activity in ethylene polymerization were investigated.The catalysts were characterized by means of BET,SEM and XRD.The results indicated that adding SiO2 could improve particle morphology and uniformity of the catalysts.The catalyst activity decreased,and bulk density and melt index of the obtained polyethylene first increased and then almost unchanged alon... |
| Keywords: | MgCl2-SiO2 composite support Ziegler-Natta catalyst ethylene polymerization polyethylene |
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