| 摘要 |
PURPOSE:To separate a catalyst from a reaction solution without decomposing the catalyst in alkylating an aromatic compound with an olefin by using a boron trifluoride ether complex as the catalyst and to reuse the catalyst without reduction in catalytic activity by adding a weak acid to the reaction system. CONSTITUTION:In alkylating an aromatic compound with an olefin by using a boron trifluoride ether complex as a catalyst, preferably 0.05-2mol, especially 0.1-1mol based on 1mol of the complex of a weak acid, especially phosphoric acid, acetic acid or phenol is added to the reaction system in any stage before or after the reaction. Then the system after the reaction is allowed to stand, the catalyst part is separated, the separated catalytic layer is used as it is for the next alkylation, the catalyst which has been difficult to recover and to reuse is extremely readily separated from the reaction solution and is continuously reused many times without damaging catalytic activity. |
