硅胶负载型烯烃聚合催化剂的研究 Ⅳ 化学活化对催化剂形态的影响  

STUDIES ON SILICASUPPORTED POLYOLEFIN CATALYSTS EFFECTS OF CHEMICALACTIVATION ON MORPHOLOGY OF CATALYSTS

作　　者：刘柏平[1] 任晓红[1] 阳永荣[1] 戎顺熙[1] 

机构地区：[1]浙江大学化工系

出　　处：《化学反应工程与工艺》1999年第2期113-117,共5页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金;中国石化总公司基金

摘　　要：ＳＥＭ观察发现了催化剂制备过程中颗粒的破碎和聚结现象，破碎随化学活化时三乙基铝量的增加而加剧，同时还发现了细粒子和碎片在粒径较大催化剂颗粒表面的聚结现象，发生聚结的细粒子或碎片的粒径一般在２０μｍ以下，破碎和聚结都破坏了催化剂的宏观形态，较多的三乙基铝量也改变了催化剂颗粒表面的微观形态。By SEM method, particle fracture phenomena were found in the catalyst preparation process. Fractures would be aggravated with the increase in the amount of AlEt3 used in chemicalactivation steps. At the same time, the agglomeration phenomenon of small particle and fragments was also found on large catalyst particle surfaces, and the diameters of the small particles or fragments were mostly below 20 m. Both fracture and agglomeration made the catalyst macromorphology worse. Certain kind of cottonlike substance occurred on the local surface of the catalyst with excessive amount of AlEt3.

关 键 词：硅胶 负载型 聚烯烃 催化剂 聚合 气相法 活性 

分 类 号：TQ325.104[化学工程—合成树脂塑料工业] O643.361[理学—物理化学]