TY - JOUR
T1 - Solvent-free oxidation of p-tert-butyl toluene catalyzed with cobalt 4-tert-butylbenzoate in an internal circulation bubbling bed reactor
AU - Pengzhen, Yin
AU - Qin, Wu
AU - Daxin, Shi
AU - Kangcheng, Chen
AU - Yaoyuan, Zhang
AU - Wenqiang, Liang
AU - Hansheng, Li
N1 - Publisher Copyright:
© 2023
PY - 2023/10/5
Y1 - 2023/10/5
N2 - P-tert-butyl benzoic acid (PTBA) was synthesized by solvent-free oxidation of p-tert-butyl toluene (PTBT) at atmospheric pressure using cobalt 4-tert-butylbenzoate as catalyst and oxygen as an oxidant in a self-made internal circulation bubbling bed reactor (ICBBR). The effects of different catalysts and reactors on the reaction were investigated. The results show that the catalytic performance of cobalt 4-tert-butylbenzoate is superior, and the performance of the ICBBR is distinctly better than that of the batch stirred tank reactor (BSTR). The effects of reaction conditions such as flow rate, reaction temperature, and catalyst concentration on the oxidation of PTBT were studied. According to the distribution and kinetics of oxidation products, the oxidation mechanism of PTBT was analyzed. The results show that under the conditions of the oxygen flow rate of 2.5 L/min, reaction temperature of 150 °C and Co mass fraction of 250 ppm, the conversion rate of PTBT is 45.63% and the selectivity of PTBA is 97.8% after 4 h reaction without solvent. The reaction kinetics model of oxidation of PTBT to PTBA was established, and the reaction kinetics equation was obtained. The experimental values were close to the predicted values of the model.
AB - P-tert-butyl benzoic acid (PTBA) was synthesized by solvent-free oxidation of p-tert-butyl toluene (PTBT) at atmospheric pressure using cobalt 4-tert-butylbenzoate as catalyst and oxygen as an oxidant in a self-made internal circulation bubbling bed reactor (ICBBR). The effects of different catalysts and reactors on the reaction were investigated. The results show that the catalytic performance of cobalt 4-tert-butylbenzoate is superior, and the performance of the ICBBR is distinctly better than that of the batch stirred tank reactor (BSTR). The effects of reaction conditions such as flow rate, reaction temperature, and catalyst concentration on the oxidation of PTBT were studied. According to the distribution and kinetics of oxidation products, the oxidation mechanism of PTBT was analyzed. The results show that under the conditions of the oxygen flow rate of 2.5 L/min, reaction temperature of 150 °C and Co mass fraction of 250 ppm, the conversion rate of PTBT is 45.63% and the selectivity of PTBA is 97.8% after 4 h reaction without solvent. The reaction kinetics model of oxidation of PTBT to PTBA was established, and the reaction kinetics equation was obtained. The experimental values were close to the predicted values of the model.
KW - Catalytic oxidation
KW - Cobalt 4-tert-butylbenzoate
KW - Dynamics
KW - Internal circulation bubbling bed reactor
KW - P-tert-butyl benzoic acid
KW - P-tert-butyl toluene
UR - http://www.scopus.com/inward/record.url?scp=85164254585&partnerID=8YFLogxK
U2 - 10.1016/j.ces.2023.119046
DO - 10.1016/j.ces.2023.119046
M3 - Article
AN - SCOPUS:85164254585
SN - 0009-2509
VL - 280
JO - Chemical Engineering Science
JF - Chemical Engineering Science
M1 - 119046
ER -