H. Imai, T. Hasegawa, H. Uchida
1968
Citations
0
Influential Citations
11
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
The composition of hexene isomers produced by the dimerization of propylene over a nickel oxide-silica-alumina catalyst has been examined under the following experimental conditions: 10–300 kg/cm2, 100 and 200°C. Under a typical set of experimental condition (50 kg/cm2, 200°C), eight hexene isomers, i.e. 4-methyl-trans-2-pentene, 4-methyl-cis-2-pentene, 2-methyl-1-pentene, trans-2-hexene, cis-2-hexene, 3-methyl-trans-2-pentene, 3-methyl-cis-2-pentene, and 3-methyl-1-pentene, have been found to be the primary products of the dimerization. Among these, more trans isomers are produced initially than the corresponding cis isomers for 4-methyl-2-pentenes and 2-hexenes, but the reverse is true for 3-methyl-2-pentenes. Under higher pressures, 2,3-dimethylbutenes are also produced at 200°C. A reaction scheme assuming the intermediates of cyclobutane derivatives has been proposed to explain the above findings. The scheme may also explain the unique order of the activity of the present catalyst for a series of n-ol...