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Catalysts 2017, 7(9), 273; doi:10.3390/catal7090273

The Isomerization of Limonene over the Ti-SBA-15 Catalyst—The Influence of Reaction Time, Temperature, and Catalyst Content

West Pomeranian University of Technology Szczecin, Faculty of Chemical Technology and Engineering, Institute of Organic Chemical Technology, Pulaskiego 10, 70-322 Szczecin, Poland
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Received: 10 August 2017 / Revised: 6 September 2017 / Accepted: 12 September 2017 / Published: 14 September 2017
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Abstract

The isomerization of limonene over the Ti-SBA-15 catalyst, which was prepared by the hydrothermal method, was studied. The main products of limonene isomerization were terpinolene, α-terpinene, γ-terpinene, and p-cymene—products with numerous applications. The amount of these products depended on reaction time, temperature, and catalyst content. These parameters changed in the following range: reaction time 30–1380 min, temperature 140–160 °C, and catalyst content 5–15 wt %. Finally, the most favorable conditions for the limonene isomerization process were established: a reaction time of 180 min, temperature of 160 °C, and amount of the catalyst 15 wt %. In order to obtain p-cymene (dehydroaromatization product), the most favorable conditions are similar but the reaction time should be 1380 min. The application of such conditions allowed us to obtain the highest amounts of the desired products in the shortest time. View Full-Text
Keywords: limonene; isomerization; Ti-SBA-15 catalyst; p-cymene; α-terpinene; γ-terpinene; terpinolene limonene; isomerization; Ti-SBA-15 catalyst; p-cymene; α-terpinene; γ-terpinene; terpinolene
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Retajczyk, M.; Wróblewska, A. The Isomerization of Limonene over the Ti-SBA-15 Catalyst—The Influence of Reaction Time, Temperature, and Catalyst Content. Catalysts 2017, 7, 273.

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