Abstract
Crystalline bis-(monohydrogenorthophosphate) of titanium (α-TiP) and titanium pyrophosphate were prepared and their catalytic activities for 1-butene isomerization were investigated. The activity of α-TiP strongly depends on the evacuation temperature; it reached a maximum at 600°C. Though titanium pyrophosphate showed negligibly low activity before grinding, it showed substantial activity after grinding. Ground titanium pyrophosphate exhibited similar evacuation-temperature dependence of the activity to that for α-TiP.
