| 摘要 |
PURPOSE:To produce p-xylene in high efficiency, by methylating benzene or toluene in the presence of a catalyst comprising a crystalline borosilicate attached with carbon. CONSTITUTION:p-Xylene can be produced in high selectivity and yield, by methy lating benzene or toluene in the presence of a catalyst comprising a crystalline borosilicate attached with carbon and obtained by contacting a crystalline borosilicate with an aromatic hydrocarbon, especially the above raw material at 400-700 deg.C. Since the catalyst has long life, the reaction can be carried out continuously for a long period keeping high catalytic activity, and the process is useful and extremely advantageous for industrial purpose. |
