采用等体积浸渍法制备了Cu(5%)-Al-MCM-41分子筛催化剂,在固定床连续反应器中以苯和苯甲醇为反应物合成二苯甲烷。考察了焙烧温度和焙烧时间对Cu(5%)-Al-MCM-41催化性能的影响以及反应条件对二苯甲烷合成反应的影响。利用XRD、N₂吸附-脱附和NH₃-TPD等表征手段对制备的分子筛催化剂进行分析,结果表明,焙烧温度为550℃、焙烧时间为6 h制备的催化剂织构性质较好。苯和苯甲醇反应合成二苯甲烷适宜的反应条件为:剂油质量比为1∶3、反应压力为1 MPa、反应温度为110℃、体积空速(GHSV)为1.5 h^-1,在此条件下苯甲醇的转化率为98.15%,二苯甲烷收率为88.45%。

Cu(5%)-Al-MCM-41 molecular sieve catalyst is prepared through an equal volume impregnation method,and applied for synthesis of diphenylmethane from benzene and benzyl alcohol in a fixed bed continuous reactor.The influences of calcination temperature and time on the catalytic performance of Cu(5%)-Al-MCM-41,and reaction conditions on the synthesis of diphenylmethane are investigated.XRD,N₂ adsorption-desorption and NH₃-TPD are employed to analyze the prepared molecular sieve catalysts.Results show that the catalysts prepared through calcinating at 550℃ for 6 hour have good texture properties.The optimum reaction conditions for the synthesis of diphenylmethane from benzene and benzyl alcohol are as follows:the ratio of agent to oil is 1∶3,reaction pressure is 1 MPa,reaction temperature is 110℃,and GHSV is 1.5 h^-1.Under these conditions,the conversion rate of benzyl alcohol is 98.15%,and the yield of diphenylmethane is 88.45%.

宁良明(2000-),男,硕士生,研究方向为分子筛催化剂,18340374503@163.com;刘冬梅(1977-),女,博士,副教授,研究方向为分子筛催化剂,通讯联系人,ldmwain1234@126.com。