| abstract |
A disproportionation catalyst comprising rhenium heptoxide supported on gamma-alumina obtained by calcination of an alumina hydrate, which alumina hydrate is prepared by a process which comprises the steps of: A. REACTING AN ALUMINIUM ALKYL OF LOW MOLECULAR WEIGHT, E.G., ALUMINIUM TRIETHYL WITH AN ALPHA MONO-OLEFIN, ETHYLENE BEING PREFERRED TO FORM HIGHER MOLECULAR WEIGHT ALUMINIUM ALKYL, B. OXIDISING THE HIGHER MOLECULAR WEIGHT ALUMINIUM ALKYLS TO FORM THE CORRESPONDING ALUMINIUM ALKOXIDES, C. HYDROLYZING THE ALUMINIUM ALKOXIDES TO FORM THE ALUMINA HYDRATE AND THE CORRESPONDING FATTY ALCOHOLS, D. RECOVERING THE ALUMINA HYDRATE, E.G., BY FILTRATION. Olefins are produced by contacting an olefinic hydrogen feedstock with the disproportionation catalyst. |