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    PRODUCTION OF P-XYLENE
    42.
    发明专利
    PRODUCTION OF P-XYLENE 失效

    公开(公告)号：JPS6263528A

    公开(公告)日：1987-03-20

    申请号：JP20346185

    申请日：1985-09-17

    申请人： TEIJIN YUKA KK

    发明人： SATO KIMIHIKO ,  NAMATAME AKIO ,  ONODERA TAMIO

    IPC分类号： C07C2/00 ,  B01J29/00 ,  B01J29/70 ,  C07B61/00 ,  C07C1/00 ,  C07C2/70 ,  C07C2/86 ,  C07C15/08 ,  C07C67/00

    摘要： PURPOSE:To obtain p-xylene in high conversion, by modifying a catalyst containing a crystalline aluminosilicate with phosphorus oxide, etc., treating the modified catalyst with a silicic acid ester in liquid phase and methylating toluene in vapor phase in the presence of the above catalyst. CONSTITUTION:A catalyst containing crystalline aluminosilicate modified with phosphorus and/or its oxide (e.g. zeolite ZSM-5) is treated with a silicic acid ester in liquid phase. p-xylene is produced by methylating toluene with a methylation agent (e.g. methanol, dimethyl ether, etc.) in vapor phase in the presence of the above treated catalyst. The methylation is carried out at 300-700 deg.C and a weight-hour space velocity of 1-800/hr at a methylation agent/toluene molar ratio of 0.01/n-2/n (n is 2 when the methylation agent is dimethyl ether and is 1 otherwise). The methylation may be performed in the presence of hydrogen.