| 摘要 |
1,164,648. 1,2-Di-(aryl) ethylenes. EASTMAN KODAK CO. 20 Oct., 1966 [20 Oct., 1965], No. 46914/66. Heading C5E. [Also in Division C2] 1,2-Di-(aryl) ethylenes are prepared by heating one or more mono-aryl methanes at reaction temperatures with, as an inorganic oxidant, As 2 O 5 , Sb 2 O 5 , Bi 2 O 3 , SbO 4 or manganese arsenate or mixtures thereof, or a substance or substances giving rise to said oxidant on heating at or below said reaction temperature. Reaction may be effected at 200-600‹ C. with the monoaryl methane in liquid or vapour form. The inorganic oxidant may be supported on e.g. alumina, silica, titania or kieselguhr and may be re-oxidized periodically or by continuous or intermittent removal of part of the oxidant during the reaction, re-oxidation thereof and return thereof continuously or intermittently. The preparation of stilbene is described in Examples 1, 2 and 11. 4,4<SP>1</SP>-Diphenyl-stilbene, 1 - naphthyl - 2 - phenyl - ethylene and 1- (naphth - 2<SP>1</SP> - yl) - 2 - naphthylethylene are also specified as products of the process. |
