Abstract: With CTAB as template, the β/MCM-41 micro-mesoporous composite molecular sieve has been synthesized by self-assembly of the zeolite structure fragments and the structural units obtained by alkali-treated β zeolite, and the effects of the alkali solution concentration, CTAB dosage in the synthesis process of β/MCM-41 was investigated. The β/MCM-41 composite molecular sieve with well long-range order can be synthesized under the optimum conditions: The solution concentration of NaOH is 1.5 mol/L and the mass fraction of CTAB is 10%. Then the Ce-β/MCM-41 composite molecular sieve doped skeleton with rare earth metal Ce was synthesized and the effect of Ce doping amount (Ce/β=0.03, 0.08) on Ce-β/MCM-41 was investigated. The result shows that the 0.03-Ce-β/MCM-41 had a well long-range order. The effect of acetylation reaction conditions on the yield of p-MOAP was investigated by using 0.03-Ce-β/MCM-41 as a catalyst in a fixed bed. The single-factor experiments showes that the 4.0 h p-MOAP yield is 58.6% under the conditions: The velocity of the reactants flow is 65 mL/h, the LHSV is 6.5 h^-1, reaction temperature is 140 ℃ and n(AN)/n(AA)=6.0.

Key words: β/MCM-41 composite molecular sieve, Anisole, Catalytic activity

摘要： 通过β沸石的碱溶解得到沸石结构碎片和结构单元，然后将这些结构碎片和单元在模板剂CTAB的作用下自组装形成β/MCM-41复合分子筛，并考察了NaOH浓度、CTAB质量分数对β/MCM-41的影响。当NaOH浓度1.5 mol/L、CTAB质量分数10%时，能够制备出长程有序性较好的β/MCM-41复合分子筛。随后制备了稀土金属Ce骨架掺杂的Ce-β/MCM-41复合分子筛，并考察Ce掺杂量(m(Ce)/m(β)=0.03、0.08）对Ce-β/MCM-41的影响，当m(Ce)/m(β)=0.03时，所制备0.03-Ce-β/MCM-41的长程有序性较好。以0.03-Ce-β/MCM-41为催化剂，在固定床上考察乙酰化反应工艺条件对p-MOAP收率的影响。正交试验结果表明，当反应物流量65 mL/h、体积空速6.5 h^-1、反应温度140 ℃和n(AA)/n(AN)=6.0时，p-MOAP的4.0 h收率可达58.6%。

关键词: β/MCM-41复合催化剂, 苯甲醚, 催化性能