| 摘要 |
<p>Hydrocarbons are obtained by the coupling of hydrocarbon radicals by a process which comprises pyrolysing a compound having one or more hydrocarbon radicals attached to a saturated carbon atom in a ring in the molecule. The hydrocarbon radicals to be coupled are preferably substituents on the saturated carbon atoms of a dihydro-aromatic hydrocarbon which preferably contains fused rings. Suitable aromatic hydrocatbons are benzene, naphthalene, biphenylene, cyclopentaindene, s-indacene, as-indacene acenaphthylene, anthracene, phenanthrene, fluoranthrene, naphthacene, chrysene, triphenylene pentacene, picene, dibenzophenanthrene and phenyl naphthalene. One or two substituents is or are introduced by alkylation preceded or followed by hydrogenation, if aliphatic the radical may contain 2 to 8 carbons, if aryl (including alkaryl and aralkyl) 6 to 16 carbons. Representative are ethyl, n-propyl, n-butyl, n-pentyl, n-hexyl, isoprppyl, isobutyl, tert.-butyl, 2-ethylpropyl, 1-methylpropyl, benzyl, o-methylbenzyl, cyclopentyl, cyclohexyl, allyl, methallyl, 2-pentenyl, 2-methyl-2-butenyl, 3-pentenyl, 4-pentenyl, 2-butenyl, 3-butenyl, 2,3-dimethyl-2-butenyl, 1,1-dimethyl-2-propenyl, 1-methyl-2-propenyl, cyclopent-2-enyl, phenyl, naphthyl, tolyl and xylyl. Two different radicals may be present but preferably two different compounds are employed to obtain "mixed" products. Other hydrocarbyl groups, unaffected by the pyrolysis, may be present. The pyrolysis is effected at 350 DEG C.-550 DEG C. for 1-120 seconds at 1 mm. Hg to 1,000 atmospheres (preferably atmospheric pressure) a diluent being added, if desired, e.g. nitrogen, helium, flue gas, carbon monoxide or benzene vapour, the precursor aromatic hydrocarbon is produced along with the coupled compound and may be re-used by alkylating and hydrogenating.</p> |
