| 摘要 |
PURPOSE:To obtain cumene having improved quality, by producing crude cumene from benzene and propylene, contacting the crude product with a solid acidic substance to convert existing unsaturated compounds into high-boiling hydrocarbons and separating and removing the hydrocarbons by distillation. CONSTITUTION:Benzene is made to react with propylene in the presence of a phosphoric acid catalyst, a Friedel-Crafts catalyst, etc. The obtained crude cumene is made to contact with a solid acidic substance at <=130 deg.C (preferably 50-120 deg.C) to convert the existing unsaturated compounds into high-boiling hydrocarbons, which are separated and removed by distillation to obtain high- quality cumene. The solid acidic substance is preferably those containing >=0.15meq/g of a solid acid having an acid strength PKa of +3.3 and is e.g. China clay or zeolite, especially preferably activated clay produce by treating an acid clay with sulfuric acid. Cumene is useful as a production intermediate for synthetic polymer, surfactant, pharmaceuticals, agricultural chemicals, etc. |
