硅胶负载茂金属催化剂的制备及其催化乙烯聚合 |
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引用本文: | 张鹏,李丽,江竹海,韦少义,王海,张平生. 硅胶负载茂金属催化剂的制备及其催化乙烯聚合[J]. 石化技术与应用, 2013, 0(6): 486-488 |
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作者姓名: | 张鹏 李丽 江竹海 韦少义 王海 张平生 |
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作者单位: | [1]中国石油兰州化工研究中心,甘肃兰州730060 [2]中国石油华北化工销售公司,北京100009 |
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摘 要: | 采用浸渍法,制备了负载型茂金属催化剂双(1-乙基-2-甲基环戊二烯基)二氯化锆(简称茂金属化合物)-甲基铝氧烷-硅胶。以乙烯为原料,干燥的己烷(4L)为反应介质,加入茂金属催化剂后,在温度为80℃,压力为1MPa的条件下反应2h,可制备聚乙烯。结果表明,制备的催化剂颗粒形态较好,粒子分布均匀。以3”硅胶为载体,催化剂最佳制备条件为:硅胶用量6g,催化剂中的铝元素/锆元素(摩尔比)为150,茂金属化合物用量为0.12g。在此条件下,催化活性为2686g/g。
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关 键 词: | 茂金属催化剂 硅胶 负载 乙烯 聚合 催化活性 |
Preparation of silica gel - supported metallocene catalyst and its catalytic ethylene polymerization |
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Affiliation: | ZHANG Peng ,LI Li ,JIANG Zhu-hai ,WEI Shao -yi ,WANG Hai,ZHANG Ping -sheng ( 1. Lanzhou Petrochemical Research Center, PetroChina, Lanzhou 730060, China ; 2. North China Chemicals Marketing Company, PetroChina , Beijing 100009, China) |
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Abstract: | Abstract: The metallocene catalyst ( 1 - Et - 2 - MeCp)2ZrC12/MAO/SiO2 was prepared by impreg- nation method. Polyethylene was prepared under the condition of temperature 80 ℃, pressure 1 MPa,time 2 h,dry hexane (4 L) as reaction medium. The results showed that the catalyst had good particle mor- phology and narrow particle size distribution. Theoptimum preparation condition of catalyst was:3 sil- ica gel 6 g,A1/Zr molar ratio 150,metallocene com- plex 0.12 g. Under this condition, the catalytic activ- ity was 2 686 g/g. |
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Keywords: | metallocene catalyst silica gel load-ing ethylene polymerization catalytic activity |
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