摘要
采用气相色谱法和酸碱滴定法监控反应进程,验证了1,2-环己二醇是环己烯氧化制备己二酸过程中最重要的氧化中间体;在该前提下,以磷酸为助剂,采用初始浓度法研究了钨酸催化H2O2氧化环己烯生成1,2-环己二醇的反应动力学.结果表明,环己烯反应级数为1.33,H_2O_2反应级数为1.08,动力学方程为r=2.322′10^(10(e^(-10480/T)C_(c_e)^(1.33)c_(H_2O_2)^(1.08),活化能Ea=87.15 k J/mol,指前因子A=2.322×10^(10).通过实验验证氧化动力学方程,计算值和实验值的平均相对误差为0.017,两者基本吻合.
Monitoring the reaction by gas chromatography and acid-base titration to verify that 1,2-cyclohexanediol（1,2-Cd） is the most important reaction intermediate when cyclohexene（Ce） oxidatized to adipic acid（AA）. Under this premise, hydrogen peroxide oxidatize cyclohexene to 1,2-cyclohexanediol catalyzed by tungstate with the method of initial concentration, wherein phosphoric acid as additives. The results showed that reaction order of cyclohexene is 1.33 and reaction order of hydrogen peroxide is 1.08. The kinetics equation is written asr=2.322×10^10e^-10480/TCH2O2^1.08, and activation energy is 87.15 k J/mol. Pre-exponential factor of the reaction is about 2.322×10^10, and kinetic model is verified experimentally, the error between calculated values and experimental values is 0.017, both are consistent.
出处
《过程工程学报》
CAS
CSCD
北大核心
2016年第6期990-996,共7页
The Chinese Journal of Process Engineering
