Dehydrogenation of Tertiary Amylenes (Shell Process) : Isoprene synthesis |
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Dehydrogenation of Tertiary Amylenes (Shell Process) : Isoprene synthesis
t-Amylenes (2-methyl-1-butene and 2-methyl-2-butene) are produced in small amounts with olefins from steam cracking units. The amylenes are extracted from a C5 fraction with aqueous sulfuric acid. Dehydrogenation of t-amylenes over a dehydrogenation catalyst produces isoprene. The overall conversion and recovery of t-amylenes is approximately 70%. The C5 olefin mixture can also be produced by the reaction of ethylene and propene using an acid catalyst.
The C5 olefin mixture is then dehydrogenated to isoprene.
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