title: Effects of various poisoning compounds on the activity and stereospecificity of heterogeneous Ziegler-Natta catalyst.
abstract: A TiCl4/ethylbenzoate/MgCl2Ziegler-Natta catalyst was pretreated with chemically different poisoning compounds to investigate their effects on the catalyst activity and stereospecificity for propylene polymerization. The poisoning power on the activity was in the order of methanol > acetone > ethyl acetate. A kinetic analysis using the stopped-flow method revealed that addition of the poisoning materials decreased the activity through the reduction of the number of active sites, whereas the catalyst isospecificity was hardly affected by these materials.
authors.affiliation: Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Kitti
authors.initials: K
authors.lastname: Tangjituabun
authors.affiliation: Catalyst Research Division, Samsung Total Petrochemicals Co., Ltd., Chung Nam 356-711, Korea.
authors.forename: Sang
authors.initials: S
authors.lastname: Yull Kim
authors.affiliation: Tokyo Research Laboratory, Yuki Gosei Kogyo Co., Ltd., Tokyo 174-0043, Japan.
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Hiraoka
authors.affiliation: School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan.
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Taniike
authors.affiliation: School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan.
authors.forename: Minoru
authors.initials: M
authors.lastname: Terano
authors.affiliation: Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Bunjerd
authors.initials: B
authors.lastname: Jongsomjit
authors.affiliation: Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Piyasan
authors.initials: P
authors.lastname: Praserthdam
keywords: Ziegler–Natta catalyst; poisoning material; stopped-flow propylene polymerization