| 摘要 |
<p>PURPOSE:To obtain the titled compound useful as a stabilizer, etc. in improved catalytic activity in a short time in good selectivity in high yield, by making water of a liquid phase in a reaction system into a specific concentration, reacting in a liquid phase phenol with an olefin in the presence of an alumina catalyst. CONSTITUTION:Phenol is heated in a liquid phase in the presence of a powdery or granular alumina catalyst at 150-400 deg.C, so that it is distilled and dehydrated, a water concentration of a liquid phase in the reaction system is kept at <=250ppm, an olefin such as propylene, 1-butene, etc. is added to the reaction system at 1-50kg/cm<2>, phenol is reacted with the olefin for 0.1-50hr to give the aimed compound such as ortho-isopropylphenol, etc. The alumina catalyst, for example, is obtained by decomposing an aqueous solution of sodium aluminate prepared by Bayer's process with CO2, drying the prepared precipitate, and calcining the prepared Al(OH)3, and used. USE:An intermediate for an antioxidant, agricultural chemical, and dye.</p> |
