Alkylation of toluene with 1-hexene over macroreticular ion-exchange resins
摘要:
The macroreticular acidic ion-exchange resins Amberlyst 35, Amberlyst 46 and Purolite CT 275 were investigated as catalysts for the alkylation of toluene with 1-hexene and simultaneous dimerization and isomerization of the olefin at 373 K. After six hours of reaction, 1-hexene conversion was complete. At low toluene concentration double-bound isomerization of 1-hexene was the main reaction. As toluene concentration increased, double-bond isomerization decreased and toluene alkylation and olefin dimerization reactions increased. By using Purolite CT 275 resin and for an almost equimolar toluene to 1-hexene ratio, the selectivity to dimers was 22%, that of mono- and di-alkylated compounds were 42% and 3.5%, respectively, while that of double-bound isomerization was 32.5%. These reactions catalyzed by macroreticular ion-exchange resins of high acid capacity and degree of crosslinking can be useful to boost naphtha streams in the refining industry by reducing volatile compounds and aromatics of low boiling point. (C) 2014 Elsevier B.V. All rights reserved.
A New Preparation Method for the Alkylation Catalysts of Aromatic Compounds Based on Immobilized AlCl3
作者:V. I. Bykov、B. A. Belyaev
DOI:10.1134/s0023158421020026
日期:2021.3
Abstract A new method for the preparation of active catalysts for the alkylation and transalkylation of aromatic compounds (benzene and toluene) based on aluminum chloride immobilized on the surface of silica gel was developed. The alkylation occurred with a high reaction rate at room temperature. Thus, the conversion of 1-hexene in the alkylation of benzene or toluene was close to 100% already 5 min
New Heterogeneous Alkylation Catalysts Based on Niobium Pentachloride
作者:V. I. Bykov、B. A. Belyaev、T. A. Butenko
DOI:10.1134/s0023158418050026
日期:2018.9
New active catalysts based on niobiumpentachloride immobilized on the surface of silica gel or aluminum oxide for the alkylation of aromatic compounds were prepared. The reaction occurs with a high rate at room temperature. Thus, the conversion of 1-hexene in the alkylation of benzene or toluene was close to 100% only 5 min after the onset of the reaction.