CAJ | 학술논문

研究了在硫酸溶液中,以V5+为氧化剂将甲苯氧化为苯甲醛.探讨了硫酸浓度、V5+与甲苯的摩尔比、反应温度以及反应时间等因素对苯甲醛产率的影响.结果表明,硫酸浓度较低时,苯甲醛产率也较低,这是因为溶液酸度较低时,V5+的氧化性较弱;但硫酸溶液浓度超过11mol·L时反应产率下降,可能与反应的副产物增加有关.在硫酸浓度为11mol·L、甲苯与V5+物质的量之比为11:1、反应温度80°C以及反应时间为180 min等条件下,苯甲醛产率可达71.32%.动力学研究表明, V5+氧化甲苯为苯甲醛的表观反应级数为1.
연구료재류산용액중,이V5+위양화제장갑분양화위분갑철.탐토료류산농도、V5+여갑분적마이비、반응온도이급반응시간등인소대분갑철산솔적영향.결과표명,류산농도교저시,분갑철산솔야교저,저시인위용액산도교저시,V5+적양화성교약;단류산용액농도초과11mol·L시반응산솔하강,가능여반응적부산물증가유관.재류산농도위11mol·L、갑분여V5+물질적량지비위11:1、반응온도80°C이급반응시간위180 min등조건하,분갑철산솔가체71.32%.동역학연구표명, V5+양화갑분위분갑철적표관반응급수위1.
Toluene is oxidized into benzaldehyde by V5+ in acidic solutions. Effects of H2SO4 concentrations, molar ratios of V5+ to toluene, reaction temperature and time on the yield of benzaldehyde are studied and discussed. Results show that for lower H2SO4 concentrations where oxidation potentials of V5+ decrease, it will lead to low yields of benzaldehyde. However, when H2SO4 concentrations are more than 11mol·L, the yield of benzaldehyde decreases. Under the conditions that H2SO4 concentration is 11mol·L, molar ratio of V5+ to toluene is 1:11, reaction temperature is 80°C and reaction time is 180 min, the yield of benzaldehyde reaches to 71.32%. It is indicated from kinetic research of the reaction that apparent reaction order of oxidation of toluene by V5+ into benzaldehyde is 1.