The title reaction was studied over CaO catalysts which had been prepared by the calcination of Ca(OH)2 in air, followed by heating in a He stream or by thermal decomposition in a He flow. The former catalysts gave high cis/trans ratios (up to 21.6), while the latter ones were higher in activity but showed much lower ratios (ca. 1).
Aus ZIOCI2 entsteht durch Hydrolyse mit wäßrigem NH4OH, anschließender Trocknung bei 100°C, Behandlung mit H2SO4 und Calcinierung bei 500°C der im Titel genannte Katalysator, in dessen Gegenwart Butan sich pulspyrolytisch zwischen 100 und 250°C zu Isobutan und ab 250°C auch zu Propan isomerisiert.
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