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以Ziegler-Natta催化剂和茂金属催化剂为例,介绍了聚烯烃均相催化剂的负载化技术以及载体选择的影响因素,明确了载体的强度、密度、总孔容、孔分布、孔径、粒度和颗粒形状等物理性质是选择载体要考虑的主要因素。综述了聚烯烃催化剂载体硅胶的结构特征和性能特征,并对聚烯烃催化剂载体硅胶的合成机理、影响因素进行了详细介绍。此类载体硅胶比表面积280~320m2/g、堆密度0.28~0.32g/cm3、孔容1.40~1.70cm3/g、平均孔径18~22nm。建议通过开展对不同性能硅胶(如更小粒径、不同元素改性等)的研究开发,以满足不同催化剂对载体硅胶的特殊要求。
Taking Ziegler-Natta catalyst and metallocene catalyst as examples, the loading technology of polyolefin homogenous catalyst and the influence factors of carrier selection are introduced. The carrier strength, density, total pore volume, pore distribution, pore size, particle size and particle size Physical properties such as shape are the main factors to consider in choosing a carrier. The structural features and performance characteristics of the polyolefin catalyst support silica gel were reviewed. The synthesis mechanism and influencing factors of the silica catalyst support were introduced in detail. The silica gel has a specific surface area of 280-320 m2 / g, a bulk density of 0.28-0.32 g / cm3, a pore volume of 1.40-1.70 cm3 / g and an average pore diameter of 18-22 nm. Proposed through the development of different properties of silica gel (such as smaller particle size, different elements, etc.) research and development to meet the different catalyst on the carrier silica gel special requirements.