| 摘要 |
Fluid, high-boiling, thermostable hydrocarbons are obtained by heating an aryl alkyl halide with at least an equivalent amount of an aromatic hydrocarbon in the absence of catalyst or condensing agent until no more hydrogen halide is evolved; the product may be hydrogenated. Unreacted aromatic hydrocarbons and low-boiling products, e.g. boiling in the 250-300 DEG C. range, may be recycled. Suitable aromatic compounds are benzene and alkylbenzenes and the aryl alkyl halide may be chloromethylated benzene, naphthalene, tetrahydronaphthalene, diphenyl and their alkyl derivatives, many being specified. If desired, an aromatic hydrocarbon may be partially haloalkylated and the resultant mixture used as starting material. Preferably, the aromatic hydrocarbon is in excess, e.g. 2-10: 1 mol ratio; further solvent may be added if necessary to raise the boiling point of the mixture, e.g. chloroform or tetrachlorohydrocarbons. The temperature may be 75-450 DEG C. and the reaction time 1-7 hours. Hydrogenation is effected conventionally, e.g. over Raney nickel. Specification 830,052 is referred to. |
