摘要
采用浸渍焙烧法制备负载磷钨酸(PTA)催化剂用于以苯酐和乙基苯为原料,氯苯为溶剂合成2-(4'-乙基苯甲酰基)苯甲酸(BEA)的反应中.实验结果表明,当PTA负载量为30%(质量分数),焙烧温度为300℃时,以SiO2为载体负载PTA后,其催化活性增加逾一倍.实验采用XRD对负载量的影响、NH3-TPD对焙烧温度的影响进行了分析,用FT-IR和BET对PTA/SiO2催化剂进行了表征.考察了PTA/SiO2催化剂的重复使用性能,结果表明,PTA/SiO2在重复使用后仍保持了原有的催化活性.
A series of supported phosphotungstic acid（ PTA） catalysts were prepared with the method of impregnation,the catalysts were used in the synthesis of 2-（ 4＇-ethylbenzoyl）-benzoic acid（ BEA）,with phthalic anhydride and ethylbenzene as materials,chlorobenzene as solvent. The experimental results indicated that the catalyst has doubled in catalytic activity after supported on Si O2 with PTA loading rate 30%（ mass fraction）and calcination temperature 300 ℃. The effect of PTA loading rate,calcination temperature on the yield of BEA were studied through the characterized of XRD,NH3-TPD; PTA / Si O2 was characterized by means of FTIR and BET. Repeated use of PTA / Si O2 catalyst was examined,and the result indicated that the catalyst still maintained its original catalytic activity after repeated use.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2015年第4期49-53,共5页
Journal of Zhengzhou University（Engineering Science）
基金
国家自然科学基金资助项目(21276244)
