Catalysis, Nide 6

2-Methylpentane 2,2,4-trimethylpentane 2,3-dimethylbutane 2,4-dimethylpentane activation energy alkyl alumina aluminum bromide aluminum chloride amounts aromatics atoms benzene butane butenes carbon carbonium ion catalyst catalytic cracking CH₂ CH3 CH3 chain charge Chem chromia-alumina coke compounds concentration conversion cyclohexane dehydrocyclization dehydrogenation double bond effect equilibrium ethylene feed Figure fluoride formation free radical gasoline halides heat heptane hexane higher hydrocarbons hydrocracking increase initial isobutane isomer yield isomerization Isomerization of n-hexane isoparaffin Isopentane kcal kinetic LHSV liquid mechanism methacrylate methyl methylcyclopentane mole per cent molecular weight molecule molybdena molybdena-alumina monomer n-butane n-heptane n-hexane n-pentane naphtha naphthenes nickel nickel-silica-alumina obtained occur octane number olefins oxide paraffins pentane peroxide Petroleum platinum polymer polymerization presence pressure Propane proton psig rate constants ratio reaction temperature reactor recycle regeneration saturated side reactions silica-alumina solvent space velocity styrene sulfuric acid tertiary thermodynamic tion toluene U. S. Patent