聚烯烃催化剂用硅胶载体的热活化过程  

Thermoactivation Processes of Silica Support for Polyolefin Catalyst

作　　者：刘柏平[1] 任晓红[1] 阳永荣[1] 戎顺熙[1] 

机构地区：[1]浙江大学化工系联合化学反应工程研究所,杭州310027

出　　处：《高校化学工程学报》1999年第2期169-172,共4页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金;中石化科学技术研究开发项目

摘　　要：１前言ＵＮＩＰＯＬ气相聚乙烯工艺由于具有投资省。运行费用低、环境污染小等优势而在世界聚乙烯工业的发展中越来越占据主导地位，该工艺中使用的催化剂载体主要为无定形硅胶。硅胶的表面羟基具有较强的吸水性，水是催化剂的毒物，必须通过热活化予以除去，一般认为２０...By using thermal analysis methods, the thermoactivation processes of four kinds ofsilica supports had been studied. The effects of temperature elevation rate. particle size and silica typeon thermoactivation processes had been elucidated. Decreasing temperature elevation rate wouldaugment the dehydration amount of physisorbed water and dehydroxylation of surface silanols, and thehigher the temperature the larger the increased degree. The amount of dehydration and dehydroxylationwould vary with silica type and particle diameter. The difference between domestic and imported silicagels had also been discussed.

关 键 词：聚烯烃 催化剂 硅胶载体 热活化 聚乙烯 UNIPOL 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业] O643.36[理学—物理化学]