Results 31 to 40 of about 2,075 (218)

System Identification for Experimental Study for Polymerization Catalyst Reaction in Fluidized Bed [PDF]

, 2011
In this work, system identification method is used to capture the reactor characteristics of production rate of polyethylene (PE) based on published experimental data. The identification method is used to measure the percentage effect on the production
Ahmmed S. Ibrehem, Ibrehem, A. S.
core   +1 more source

Structural Characterization of the EtOH–TiCl₄–MgCl₂ Ziegler–Natta Precatalyst [PDF]

, 2016
The Ziegler–Natta polymerization is one major example of application of catalysis in industry. Since the first discovery of Ziegler and Natta, several modifications of the catalyst have been developed, in order to improve its performance.
D. Gajan (2925687), K. Sanders (2925693), G. Pintacuda (2311231), V. Monteil (1737115), A. Lesage (2730706), V. D’Anna (2106346), S. Norsic (2925684), A. J. Pell (2925690), C. Copéret (2925681), P. Sautet (1964296)   +9 more
core   +2 more sources

MgO/MgCl_2/TiCl_4 Core-Shell Catalyst for Establishing Structure-Performance Relationship in Ziegler-Natta Olefin Polymerization [PDF]

, 2014
Recently we successfully established the first structure-performance relationships between the catalyst surface area and propylene polymerization activity using novel MgO/MgC_l2/TiCl_4 core-shell catalysts with non-porous and non-fragmentable features ...
Taniike, Toshiaki, Terano, Minoru, Chammingkwan, Patchanee, Thang, Vu Quoc   +3 more
core   +1 more source

Effects of Ti oxidation state on ethylene, 1-hexene comonomer polymerization by MgCl_2-supported Ziegler–Natta catalysts [PDF]

, 2011
In this work, the influences of the Ti oxidation state on the catalytic properties of MgCl_2-supported Ziegler–Natta catalysts in ethylene homo- and co-polymerization with 1-hexene. Three catalysts having different Ti oxidation states were synthesized by
Taniike, Toshiaki, Jongsomjit, Bunjerd, Praserthdam, Piyasan, Terano, Minoru, Nichapat Senso, Minoru Terano, Toshiaki Taniike, Senso, Nichapat, Piyasan Praserthdam, Bunjerd Jongsomjit   +9 more
core   +1 more source

Determination of Optimal Reaction Temperature and Hydrogen Amount for Propylene Polymerization by a Mathematical Model [PDF]

Kemija u Industriji, 2019
Regarding the complexity of Ziegler-Natta catalyst kinetics in polypropylene polymerization, so far, there is no adequate model to determine the best process conditions for predicting average molecular weight and dispersity as the most crucial final ...
Gholam Hossain Varshouee, Amir Heydarinasab, Ali Vaziri, Seyed Mehdi Ghafelebashi Zarand   +3 more
doaj   +1 more source

Effects of Important Operating Parameters on Product Properties and Operation of HDPE Slurry Reactor [PDF]

علوم و تکنولوژی پلیمر, 2007
In this article, a complete model for the mixed flow slurry reactor for polymerization of ethylene to high density polyethylene in the presence of Ziegler-Natta catalyst is presented. In addition to the effects of the multiple active sites, the effect of
M. Soltanieh, A. Ramzani Saadat Abadi, A. Dashti, J. Mokhtari   +3 more
doaj   +1 more source

Structural Characterization of Electron Donors in Ziegler–Natta Catalysts [PDF]

The Journal of Physical Chemistry C, 2018
Ziegler-Natta catalysis is a very important industrial process for the production of polyolefins. However, the catalysts are not well-understood at the molecular level. Yet, atomic-scale structural information is of pivotal importance for rational catalyst development.
E. S. Merijn Blaakmeer, Giuseppe Antinucci, Andrea Correa, Vincenzo Busico, Ernst R. H. van Eck, Arno P. M. Kentgens   +5 more
openaire   +5 more sources

Structure-Performance Relationship in Ziegler-Natta Olefin Polymerization with Novel Core-Shell MgO/MgCl_2/TiCl_4 Catalysts [PDF]

, 2012
The impact of support architectures on the olefin polymerization performance of heterogeneous Ziegler–Natta catalysts has been scarcely understood due to the complexity of pore system and the fragmentation-induced structural changes during polymerization.
Taniike, Toshiaki, Terano, Minoru, Chammingkwan, Patchanee   +2 more
core   +1 more source

How can pH value during catalyst preparation affect the performance of vanadium-modified (SiO2/MgO/ MgCl2)•TiClx Ziegler-Natta polyethylene catalysts [PDF]

Polyolefins Journal, 2018
Vanadium-modified (SiO2/MgO/MgCl2)•TiClx Ziegler-Natta catalysts were prepared through co-impregnation of water-soluble magnesium and vanadium salts under different pH values.
Ting Fu, Ruihua Cheng, Xuelian He, Zhen Liu, Zhou Tian, Boping Liu   +5 more
doaj   +1 more source

Quality control for Ziegler-Natta catalysis via spectroscopic fingerprinting [PDF]

, 2018
Commercial olefin polymerization catalysts are typically produced at a manufacturing site before transport to production facilities for storage and eventual use.
Vantomme, Aurélien, Sub Inorganic Chemistry and Catalysis, Inorganic Chemistry and Catalysis, Pletcher, Paul, Welle, Alexandre, Weckhuysen, Bert M.   +5 more
core   +1 more source