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- W2086054020 abstract "The reaction investigated in this work is the dehydrogenation of α-pinene to p-cymene over carriers impregnated with Pd. An optimal acid strength is required to cleave selectively the CC bond in the cyclobutane ring of α-pinene. Too strong acid sites such as in zeolites favor side reactions like oligomerization and cracking. Too weak acid sites fail to cleave the aforementioned CC bond and rapid hydrogenation of the α-pinene is a consequence. Hydrogenolysis is also a major side reaction leading to tetramethylcyclohexanes. A reaction mechanism is proposed in which first isomerization is involved followed by hydrogenation/dehydrogenation to stabilize the components. The catalyst has a dual-functionality with the acid sites in charge of isomerization and the metallic sites responsible of hydrogenation/dehydrogenation. The use of crude sulfate turpentine (CST) as raw material shows that β-pinene has a similar reactivity as α-pinene and high yields of p-cymene can be obtained from this cheap starting material. The sulfur remains however a major drawback." @default.
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- W2086054020 date "2001-07-01" @default.
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- W2086054020 title "Catalytic aspects in the transformation of pinenes to p-cymene" @default.
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- W2086054020 doi "https://doi.org/10.1016/s0926-860x(01)00514-2" @default.
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