With the collaboration of Iran Polymer Society
Catalysis
Optimization of a new catalyst composition for trimerization of ethylene

Mohammad Javad Sharifi; Alireza Fazlali; Seyed Hamed Mahdaviani; Davood soudbar

Volume 11, Issue 4 , December 2024, , Pages 219-233

https://doi.org/10.22063/poj.2024.35534.1292

Abstract
  The performance of the catalyst system [chromium(III)/pyrrole/co-catalyst/halide] on the trimerization of ethylene has been studied using the combined experimental and response surface method (RSM). The chromium(III) tris(2-ethylhexanoate) was synthesized and characterized by FTIR, 1HNMR and 13CNMR, ...  Read More

Olefin oligomerization
Kinetic and microstructural studies of Cp2ZrCl2 and Cp2HfCl2-catalyzed oligomerization of higher α-olefins in mPAO oil base stocks production

Ahad Hanifpour; Mahdi Hashemzadeh Gargari; Mohammad Reza Rostami Darounkola; Zahra Kalantari; Naeimeh Bahri-Laleh

Volume 8, Issue 1 , January 2021, , Pages 31-40

https://doi.org/10.22063/poj.2020.2802.1170

Abstract
  Herein a quenched-flow kinetic technique was applied to calculate the rate constants of 1-hexene and 1-octene oligomerization catalyzed by the Cp2ZrCl2 and Cp2HfCl2/MAO catalyst systems, and subsequently a mechanism for the higher α-olefin oligomerization reaction was proposed. The oligomerization ...  Read More

Olefin oligomerization
Halogen substituted iron(III) di(imino)pyridine complexes as catalysts for 1-pentene/1-hexene co-oligomerization reactions

Tanja H. Ritter; Helmut G. Alt

Volume 7, Issue 2 , July 2020, , Pages 79-89

https://doi.org/10.22063/poj.2020.2718.1159

Abstract
  Nine different bis(arylimino)pyridine complexes of Fe(III) with different halide substituents (F, Cl, Br, I) at different positions of the iminophenyl group of the ligand have been synthesized, characterized and applied for homogeneous 1-pentene and 1-hexene oligomerization and co-oligomerization reactions ...  Read More

Olefin oligomerization
Homogeneous and heterogeneous oligomerization reactions of olefins with unbridged metallocene catalysts

Tanja H. Ritter; Helmut G. Alt

Volume 6, Issue 2 , June 2019, , Pages 107-116

https://doi.org/10.22063/poj.2018.2258.1119

Abstract
  1-Pentene, respectively 1-hexene, were reacted with 13 homogeneous metallocene catalysts to give linear oligomerization products, predominantly dimers, with selectivities above 90%. The product distributions of the codimerization reactions of 1-pentene with 1-hexene reflected a binomial behaviour. Therefore, ...  Read More

Olefin oligomerization
Selective production of light olefins from methanol over desilicated highly siliceous ZSM-5 nanocatalysts

Mohammad Rostamizadeh; Fereydoon Yaripour; Hossein Hazrati

Volume 5, Issue 1 , January 2018, , Pages 59-70

https://doi.org/10.22063/poj.2017.1501

Abstract
  Highly siliceous ZSM-5 nanocatalysts can dehydrate methanol to a wide range of hydrocarbons. In this study, the development of hierarchical H-ZSM-5 nanocatalysts (Si/Al=200) were reported for the methanol-toolefins (MTO) reaction. The nanocatalysts were prepared through a hydrothermal technique and treated ...  Read More

Reaction engineering
Modelling the catalyst fragmentation pattern in relation to molecular properties and particle overheating in olefin polymerization

Mohsen Najafi; Mahmoud Parvazinia; Mir Hamid Reza Ghoreishy

Volume 1, Issue 2 , December 2014, , Pages 77-91

https://doi.org/10.22063/poj.2014.1044

Abstract
  A two-dimensional single particle finite element model was used to examine the effects of particle fragmental pattern on the average molecular weights, polymerization rate and particle overheating in heterogeneous Ziegler-Natta olefin polymerization. A two-site catalyst kinetic mechanism was employed ...  Read More