| 摘要 |
PURPOSE:To obtain the corresponding aromatic olefin in high conversion and selectivity, by dehydrating a methylphenylcarbinol in a high concentration in the presence of a porous sulfonic acid type strong acidic cation exchange resin having a specified specific surface area as a catalyst. CONSTITUTION:A methylphenylcarbinol expressed by formula I (R is H or alkyl), e.g. dimethylphenylcarbinol, etc., in >=80% concentration is subjected to dehydration reaction in the presence of a catalyst consisting of a porous sulfonic acid type strong acidic cation exchange resin having >=40m<2>/g specific surface area to afford the aimed corresponding aromatic olefin expressed by formula II, e.g. alpha-methylstyrene, etc., in high conversion and selectivity even in a high concentration. EFFECT:Since troublesome operation after reaction is not required with hardly any formation of dimers or trimers of the aromatic olefin compound and the reaction can be carried out without a solvent, the method is industrially advantageous. |
