Which catalyst is used in the manufacture of isoprene by isomerization of propylene dimer?

Which catalyst is used in the manufacture of isoprene by isomerization of propylene dimer? Correct Answer Tripropyl aluminium

A compressed propylene is reacted with tripropyl aluminium catalyst along with a carrier solvent at 200atms pressure in a reactor filled with heat transfer surface to remove exothermic heat of reaction.

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What are the series of chemical reactions in manufacture of isoprene from isomerization of polypropylene dimer?
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