NaOH溶液催化正戊醛缩合反应条件优化及宏观动力学研究  

Optimization of N-valeraldehyde condensation reaction conditions by liquid alkali and study on macroscopic kinetics

作　　者：张超[1] 徐显明[2] 李智芳[3] 耿翠 康燕 杨长龙[1,3] ZHANG Chao;XU Xian-ming;LI Zhi-fang;GENG Cui;KANG Yan;YANG Chang-long(School of Chemistry and Chemical Engineering,Qiqihar University,Heilongjiang Qiqihar 161006,China;Daqing Chemical Research Center of China Petroleum,Heilongjiang Daqing 163714,China;School of Materials Science and Engineering,Qiqihar University,Heilongjiang Qiqihar 161006,China)

机构地区：[1]齐齐哈尔大学化学与化学工程学院,黑龙江齐齐哈尔161006 [2]中国石油天然气股份有限公司大庆化工研究中心,黑龙江大庆163714 [3]齐齐哈尔大学材料科学与工程学院,黑龙江齐齐哈尔161006

出　　处：《齐齐哈尔大学学报（自然科学版）》2020年第3期61-64,73,共5页Journal of Qiqihar University(Natural Science Edition)

摘　　要：在间歇釜式反应器中,以NaOH溶液为催化剂,考察了催化剂浓度、搅拌器转速、反应时间及温度对戊醛缩合反应转化率及选择性的影响。研究结果表明,当搅拌器转速超过500 r/min时,可以消除外部传递对反应的影响。确定出最佳的反应条件为:催化剂浓度2%(wt%),搅拌器转速600 r/min,反应温度120℃,反应时间1 h。拟合得到的宏观动力学为一级,-rA=0.09exp(-56.80/RT)CA,反应活化能及指前因子分别为:Ea=56.80 kJ/mol,A=0.09 m^3/(kmol•s)。In the interim tank reactor,NaOH solution was used as catalyst to investigate the effects of catalyst concentration,stirrer speed,reaction time and temperature on the conversion and selectivity of valeraldehyde condensation reaction.The results of the study show that when the stirrer speed exceeds 500 r/min,the effect of external transfer on the reaction can be eliminated.The optimum reaction conditions were determined as follows:the catalyst concentration was 2%(wt%),the stirrer speed was 600 r/min,the reaction temperature was 120℃,and the reaction time was 1 h.The macroscopic kinetics obtained by fitting is first-order,-rA=0.09exp(-56.80/RT)CA,and the reaction activation energy and pre-exponential factors are:Ea=56.80 kJ/mol,A=0.09 m^3/(kmol•s).

关 键 词：液体碱 戊醛 缩合 动力学 

分 类 号：O643.12[理学—物理化学]