| 摘要 |
PURPOSE:To prepare 2,4-diphenyl-4-methyl-1-pentene, selectively, in high yield, in one step, by heating alpha-cumyl alcohol under reduced pressure in the presence of acid clay or activated clay while distilling out the produced water from the reaction system. CONSTITUTION:To obtain the title dimer composed mainly of high-quality 2,4- diphenyl-4-methyl-1-pentene, by heating alpha-cumyl alcohol at 50-120 deg.C under a vacuum of 50-500mm.Hg in the presence of acid clay or activated clay, while distilling out the produced water from the reaction system. The amount of the acid clay or the activated clay is 1-0.01wt% of alpha-cumyl alcohol. When additional catalyst is added to the reaction system after the consumption of the alpha-cumyl alcohol, the alpha-methylstyrene remaining in the latter stage of the reaction can be converted to the dimer, and accordingly, the yield of the objective compond can be further increased. USE:Agent for regulating polymerization degree. |
