On the production of polyolefins with bimodal molecular weight and copolymer composition distributions in catalytic gas-phase fluidized-bed reactors

被引：16

作者：

Chatzidoukas, Christos ^{[1
]}

Kanellopoulos, Vassileios ^{[1
]}

Kiparissides, Costas ^{[1
]}

机构：

[1] Aristotle Univ Thessaloniki, Proc Engn Res Inst, Dept Chem Engn, GR-54124 Thessaloniki, Greece

来源：

MACROMOLECULAR THEORY AND SIMULATIONS | 2007年 / 16卷 / 08期

关键词：

catalysis; comonomer composition distribution; gas-phase olefin polymerization; molecular weight distribution; polymerization kinetics; process systems engineering;

D O I：

10.1002/mats.200700033

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A comprehensive mathematical model is developed for the dynamic calculation of the molecular distributed properties (i.e. MWD and CCD) in a gas-phase, catalytic, ethylene-1-butene copolymerization, FBR, taking into account the various kinetic, micro- and macroscopic phenomena in the reactor. The effects of the two single-site catalyst mass fractions and reactor operating conditions on the production of polyolefins with 'tailor-made' bimodal molecular properties are investigated. It is shown that PE grades with either a bimodal MWD or CCD can be produced in a single FBR, using a mixture of two single-site catalysts under properly selected operating conditions.

引用

页码：755 / 769

页数：15

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