摘要
合成了铌硅铝磷分子筛NbSAPO-5催化剂,并对其进行了XRD、BET表面吸附、ICP、SEM、NH3-TPD吸附表征,结果表明所合成的分子筛具有AFI的晶体结构;考察了催化剂对合成丙酮酸甲酯反应的催化酯化活性,表明Nb的引入使双功能催化剂的氧化和酯化功能更趋平衡,在改善酯化能力的同时,也使得酸酯总收率大大提高.
Nb-Si-Al-P（NbSAPO-5） catalysts are synthesized and their structures are characterized by XRD , BET, ICP, SEM and NH3-TPD. The results suggested that these catalysts possess the crystal structure of AFI. Esterification performance of NbFeSAPO-5 catalysts is researched with the synthetic process of methyl-pyrurate. The results indicate that the introduction of Nb atoms balances oxidation and esterfication. While improving esterification performance of the catalyst, it also increases the total yield of acid and ester.
出处
《化学研究》
CAS
2008年第2期9-12,共4页
Chemical Research
关键词
硅铝磷分子筛
催化剂
铌
丙酮酸甲酯
催化酯化
silicoaluminophosphate molecular sieves
catalyst
Nb
methyl-pyrurate
catalytic esterifi- cation
