摘要
采用分步反应、分步酸化法制备了磷钼钒缺位型杂多酸,用(C4H9)4N+(以下简写为Bu4N+)阳离子取代杂多酸中H+作为反荷离子合成了杂多季铵盐(用于苯氧化制苯酚反应).FT-IR分析反应前后催化剂结构的变化.以苯为原料,乙酸为溶剂,30%H2O2作氧化剂,系统考察了催化剂类型、催化剂用量、氧化剂用量、反应时间及温度对反应的影响.实验结果表明,56.4mmol苯在(Bu4N)5PMo10V2O40用量0.25mmol,30%H2O2用量10mL,溶剂乙酸10mL,70℃条件下回流反应6h,苯酚收率可达到27.9%.
A series of Molybdovanadophosphoric Quaternary Ammonium with Keggin - type were synthesized by multi -step method and characterized by means of IR. Using 30% aqueous hydrogen peroxide（30% H2O2） as oxidant and aetic acid as solvent, the catalytic oxidation activity for the synthesis of Phenol from Benzene by Molybdo- vanadophosphoric quaternary ammonium with Keggin - type was investigated. The effects of various parameters including the nature and the amount of the catalysts, reaction temperature and reaction time were studied. The results indicated that （Bu4N） 5 PMo10VEO40was found to be a suitable catalyst for the present reaction and the suitable reaction conditions for this reaction are 10 mL acetic acid , 0.25 mmol （Bu4N）5PMo10V2O40 per 56.4 mmol benzene,70℃ for 6 h. Under the suitable reaction conditions, the yield of phenol was up to 27.9%.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2009年第2期168-172,共5页
Journal of Molecular Catalysis(China)
关键词
苯酚
催化氧化
磷钼钒季铵盐
Phenol
Catalytic oxidation
Molybdovanadophosphoric quaternary ammonium
