(1. 南京理工大学 化工学院,南京 210094;
2. 山东轻工业学院 轻化与环境工程学院,济南 250353)
摘 要: 以十六烷基三甲基氯化铵为模板剂,在碱性条件下采用水热晶化法合成Co取代介孔磷铝分子筛。研究溶剂种类和用量、反应温度、反应时间、催化剂用量以及H2O2和苯乙烯摩尔比等因素对反应的影响。催化性能测试表明:该分子筛在苯乙烯氧化制苯甲醛反应中有很好的活性,以乙腈为溶剂,当H2O2和苯乙烯摩尔比为3、催化剂用量为5%时,在70 ℃反应4 h后,苯乙烯的转化率为42.2%,苯甲醛的选择性为82.0%,苯甲醛产率达到34.6%。
关键字: 介孔磷铝分子筛;Co;苯乙烯;苯甲醛;催化性能
(1. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;
2. School of Light Chemistry and Environment Engineering,
Shandong Institute of Light Industry, Ji’nan 250353, China)
Abstract:The Co-substituted mesoporous aluminophosphate molecular sieve (Co-MAP) was prepared by hydrothermal crystallizing process under alkaline conditions using cetyltrimethylammonium chloride as the templating agent. The influences of solvents, reaction temperature, reaction time, amount of catalyst and mole ratio of H2O2 to styrene were also studied. The results show that, under the conditions of n(H2O2)/n(styrene)=3, catalyst of 5%, reaction temperature of 70 ℃ and reaction time of 4 h, the conversion rate of styrene, the selectivity to benzaldehyde and the yield of benzaldehyde reach 42.2%, 82.0% and 34.6%, respectively.
Key words: mesoporous aluminophosphate molecular sieve; cobalt; styrene; benzaldehyde; catalytic performance