| 摘要 |
PURPOSE:To improve conversion ratio of raw material, and to obtain xylene selectively, by using a crystalline borosilicate containing fluorine, methylating toluene or benzene. CONSTITUTION:An aqueous medium is added to a silica source, a boron source, and a crystallizing agent, which are subjected to hydrothermal reaction to give crystalline boro silicate, which is reacted with chlorine to give crystalline borosilicate containing fluorine. Toluene or benzene or a mixture of them is methylated with a methylating agent such as methanol, etc. by the use of the crystalline borosilicate containing fluorine as a catalyst, to give xylens. EFFECT:The catalyst has long catalytic life, and continuous operation can be carried out with keeping high catalytic activity for a long time. |
