Oligomerization of Ethylene to Linear α-Olefins Using Complex Catalytic Systems of Zirconium Carboxylate

• Published in: Catalysis in industry 2021-10, Vol.13 (4), p.378-385
• Main Authors: Gadzhieva-Etai, K. Sh, Khanmetov, A. A., Khamiev, M. D., Bagirova, Sh. R., Seidova, Kh. G., Ibragimova, M. D., Alieva, R. V.
• Format: Article
• Language: English
• Subjects: Aliphatic compounds; Alkenes; Carboxylates; Carboxylic acids; Catalysis; Catalysis in Chemical and Petrochemical Industry; Chemistry; Chemistry and Materials Science; Comparative studies; Ethylene; Molecular weight distribution; Naphthenic acids; Oligomerization; Solvents; Zirconium
• ISSN: 2070-0504; 2070-0555
• DOI: 10.1134/S2070050421040048

The oligomerization of ethylene in aliphatic and aromatic solvents on complex zirconium carboxylate catalytic systems obtained from naphthenic acid fractions isolated from Baku oils is studied for the first time. Comparative studies are performed using complex zirconium carboxylate catalytic systems obtained from individual carboxylic acids CH 3 (CH 2 ) 2 COOH and CH 3 (CH 2 ) 8 COOH. It is found that the activity of a catalyst and the molecular weight distribution (MWD) of oligomeric products depend mainly on the solvent and the composition of the zirconium complex. It is shown that the rate of ethylene oligomerization when using zirconium carboxylate catalytic systems in aliphatic solvents is 2–3 times lower than in aromatic solvents. The resulting product has a narrow MWD and consists mainly of C 4 –C 10 fractions. The oligomeric products obtained in aromatic solvents have wide MWDs and consist mainly of C 4 –C 18 in the presence of zirconium carboxylates and of C 12 –C 18 and C 20 fractions with zirconium naphthenates.