Effects of catalyst fragmentation during propylene polymerization. IV: Comparison between gas phase and bulk polymerization processes

1991 ◽  
Vol 31 (12) ◽  
pp. 904-911 ◽  
Author(s):  
Monica A. Ferrero ◽  
Mario G. Chiovetta
Keyword(s):  
Gas Phase ◽  
Bulk Polymerization ◽  
Propylene Polymerization

ZIEGLER-NATTA PROPYLENE POLYMERIZATION IN GAS PHASE: PRODUCTION OF HIGHLY ISOTACTIC POLYMERS

1972 ◽  
Vol 1 (4) ◽  
pp. 327-329 ◽  
Author(s):  
Yoshiharu Doi ◽  
Ichiro Okura ◽  
Tominaga Keii
Keyword(s):  
Gas Phase ◽  
Propylene Polymerization ◽  
Phase Production

Specific features of gas-phase propylene polymerization

Polimery ◽  
1989 ◽  
Vol 34 (06/07) ◽  
pp. 289-290
Author(s):  
YU.A. GAVRILOV ◽  
G.A. KOROLEVA ◽  
L.A. NOVOKSHONOVA
Keyword(s):  
Gas Phase ◽  
Propylene Polymerization

scholarly journals Comparative simulation study of gas-phase propylene polymerization in fluidized bed reactors using aspen polymers and two phase models

2013 ◽  
Vol 19 (1) ◽  
pp. 13-24 ◽  
Author(s):  
Ahmad Shamiria ◽  
M.A. Hussaina ◽  
Farouq Mjallic ◽  
Navid Mostoufid
Keyword(s):  
Molecular Weight ◽  
Gas Phase ◽  
Production Rate ◽  
Fluidized Bed ◽  
Average Molecular Weight ◽  
Phase Model ◽  
Propylene Polymerization ◽  
Flow Index ◽  
Fluidized Bed Reactors ◽  
Two Phase

A comparative study describing gas-phase propylene polymerization in fluidized-bed reactors using Ziegler-Natta catalyst is presented. The reactor behavior was explained using a two-phase model (which is based on principles of fluidization) as well as simulation using the Aspen Polymers process simulator. The two-phase reactor model accounts for the emulsion and bubble phases which contain different portions of catalysts with the polymerization occurring in both phases. Both models predict production rate, molecular weight, polydispersity index (PDI) and melt flow index (MFI) of the polymer. We used both models to investigate the effect of important polymerization parameters, namely catalyst feed rate and hydrogen concentration, on the product polypropylene properties, such as production rate, molecular weight, PDI and MFI. Both the two-phase model and Aspen Polymers simulator showed good agreement in terms of production rate. However, the models differed in their predictions for weight-average molecular weight, PDI and MFI. Based on these results, we propose incorporating the missing hydrodynamic effects into Aspen Polymers to provide a more realistic understanding of the phenomena encountered in fluidized bed reactors for polyolefin production.

A Comparison of the Influence of Temperature During Slurry and Gas Phase Propylene Polymerization on Ziegler-Natta Catalyst

2016 ◽  
Vol 370 (1) ◽  
pp. 41-51 ◽  
Author(s):  
Aarón J. Cancelas ◽  
Goond Hongmanee ◽  
Fabiana N. Andrade ◽  
Minoru Terano ◽  
Toshiaki Taniike ◽  
...  
Keyword(s):  
Gas Phase ◽  
Propylene Polymerization ◽  
Influence Of Temperature ◽  
Natta Catalyst ◽  
Ziegler Natta Catalyst

Control of industrial gas phase propylene polymerization in fluidized bed reactors

2012 ◽  
Vol 22 (6) ◽  
pp. 947-958 ◽  
Author(s):  
Yong Kuen Ho ◽  
Ahmad Shamiri ◽  
Farouq S. Mjalli ◽  
M.A. Hussain
Keyword(s):  
Gas Phase ◽  
Fluidized Bed ◽  
Propylene Polymerization ◽  
Fluidized Bed Reactors
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