|Author||Lucchesi, P. J. ♦ Heath, C. E.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||CHEMISTRY ♦ ALKENES ♦ ALKYL RADICALS ♦ BUTANE ♦ CHEMICAL REACTIONS ♦ CHEMICALS ♦ COBALT 60 ♦ FREE RADICALS ♦ GAMMA RADIATION ♦ GAMMA SOURCES ♦ GASES ♦ HIGH TEMPERATURE ♦ IONS ♦ IRRADIATION ♦ METHYL RADICALS ♦ MIXING ♦ PENTANE ♦ PRESSURE ♦ PROPYLENE ♦ QUANTITY RATIO ♦ RADIATION CHEMISTRY ♦ RADIATION DOSES ♦ RADIATION EFFECTS ♦ REACTION KINETICS ♦ TEMPERATURE|
|Abstract||A study was made of the gas phase alkylation of propylene with isobutane initiated by nuclear radiation at 55 atm pressure and 350 to 400 deg C. At these conditions, Co-60 radiation initiates a chain reaction and the purely thermal reaction is negligibly slow. Detailed product composition data are given as a function of conversion level. Although the radioalkylation chain reaction gives a complex mixture of products, the major products above butane are dimethylpentanes, isopentane, and olefins. The chain length for this reactlon is of the order 20 to 100. It increases with temperature and total pressure, increases directly with increasing olefin concentration and inversely with the half power of radiation dose rate. In addition, the chain radloalkylation has an induction period. It is not possible to decide unequivocally whether this new reaction is an accelerated thermal (i.e., free radical) chain alkylation or a chain reaction propagated by ions peculiar to the radiation method of initiation. However, the data are discussed from the viewpoint of ordinary free radical chemistry and it is shown that the major results can be reconciled with well established radical reactions. (auth)|
|Learning Resource Type||Article|
|Publisher Department||Esso Research and Engineering Co., Linden, N.J.|
|Journal||Journal of the American Chemical Society|
|Organization||Esso Research and Engineering Co., Linden, N.J.|
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