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.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
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
关键词
聚烯烃
催化剂
硅胶载体
热活化
聚乙烯
UNIPOL
Polyolefin catalyst, Silica support, Thermoactivation, Thermal analysis methods
