Optimization of Effective Parameters on 1-Hexene Production from Ethylene Using Chromium/tris 2-Ethylhexanoate Catalyst

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MOHAMADNIA ZAHRA; AHMADI EBRAHIM; Farandpour Atefeh Sadat

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Journal: Nashrieh Shimi va Mohandesi Shimi Iran Year:2018 | Volume:37 | Issue:2 Page(s): 79-93

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Title

Optimization of Effective Parameters on 1-Hexene Production from Ethylene Using Chromium/tris 2-Ethylhexanoate Catalyst

Author(s)

MOHAMADNIA ZAHRA | AHMADI EBRAHIM | Farandpour Atefeh Sadat | Issue Writer Certificate

Keywords

Alpha OlefinQ1

Ethylene trimerizationQ1

Chromium 2-ethylhexanoateQ1

TriethylaluminumQ1

PyrroleQ1

1-HexeneQ1

Abstract

Linear alpha-olefins are one of the most important products of the petrochemical industry, which are widely used in the preparation of detergents, lubricants, plasticizers and also as co-monomer in the production of Linear Low-Density PolyEthylene (LLDPE). Ethylene oligomerization, especially Ethylene trimerization (1-Hexene production), is one of the most important methods used to produce these high-consumption materials, in which different catalysts are used in the presence of ethylene gas. In this regard, Ethylene trimerization catalyst based on four-component system {2, 5-dimethylPyrrole (DMP)/Cr(III)/Triethyl Aluminum (TEA)/hexachloroethane (HCE)} was prepared with high purity and the prepared catalyst was characterized using different analysis such as FT-IR, UV-Visible, CHNS, and ICP. The effect of ethylene pressure, the molar ratio of Al/Cr, ligand and solvent types and different injection methods on activity and selectivity was studied. Also, with increasing the ethylene pressure, the productivity of 1-hexane increased. The use of hexachloroethane as an accelerator in the presence of n-heptane aliphatic solvent increased the yield of the catalyst. The best way to perform the trimerization reaction was the production of dual catalyst-ligand and cocatalyst-hexachloroethane solutions separately and adding them to the reactor. Ethylene trimerization using this catalytic system at 27 ° C, 90 ° C, normal heptane solvent and Al/Cr ratio of 40 resulted in selective production of 1-Hexene with a yield of 193850 (g L-C6/g Cr. h) and selectivity of 91. 8 percent.

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APA: Copy

MOHAMADNIA, ZAHRA, AHMADI, EBRAHIM, & Farandpour, Atefeh Sadat. (2018). Optimization of Effective Parameters on 1-Hexene Production from Ethylene Using Chromium/tris 2-Ethylhexanoate Catalyst. NASHRIEH SHIMI VA MOHANDESI SHIMI IRAN (PERSIAN), 37(2 ), 79-93. SID. https://sid.ir/paper/26418/en

Vancouver: Copy

MOHAMADNIA ZAHRA, AHMADI EBRAHIM, Farandpour Atefeh Sadat. Optimization of Effective Parameters on 1-Hexene Production from Ethylene Using Chromium/tris 2-Ethylhexanoate Catalyst. NASHRIEH SHIMI VA MOHANDESI SHIMI IRAN (PERSIAN)[Internet]. 2018;37(2 ):79-93. Available from: https://sid.ir/paper/26418/en

IEEE: Copy

ZAHRA MOHAMADNIA, EBRAHIM AHMADI, and Atefeh Sadat Farandpour, “Optimization of Effective Parameters on 1-Hexene Production from Ethylene Using Chromium/tris 2-Ethylhexanoate Catalyst,” NASHRIEH SHIMI VA MOHANDESI SHIMI IRAN (PERSIAN), vol. 37, no. 2 , pp. 79–93, 2018, [Online]. Available: https://sid.ir/paper/26418/en

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