| 摘要 |
<p>PURPOSE:To provide a process for the continuous production of an ortho- alkylated phenolic compound capable of suppressing the formation of impurity by-products, increasing the orthoselectivity and keeping the high selectivity over a long period. CONSTITUTION:An ortho-alkylated phenolic compound is produced by contacting a phenolic compound with an alcohol in vapor phase in the presence of a supported catalyst containing an iron oxide using a fluidized bed reactor, thereby alkylating the phenolic compound. In the above process, the selectivity of the phenolic compound is improved and the ortho-alkylated phenolic compound is continuously produced in high efficiency by using a reactor and a regeneration apparatus, extracting a prescribed amount of the catalyst from the reactor at prescribed time interval and returning a prescribed amount of the catalyst from the regeneration apparatus to the concentrated catalyst phase of the reactor.</p> |
