液相氧化环己烷制备环己酮的鼓泡塔新工艺

在连续无搅拌鼓泡塔反应器中，以环烷酸钴为催化剂，研究了空气液相氧化环己烷制备环己酮的氧化过程. 考察了空气流速、环己烷停留时间、催化剂浓度、压力及温度对反应效果的影响. 结果表明，在无搅拌鼓泡塔中，采用空气氧化环己烷制备环己酮的适宜操作条件为：反应温度413~423 K，压力1.2~1.5 MPa；当空气表观气速为2.5~3.5 cm/s、环己烷停留时间为30~40 min时，反应转化率为5%~7%，选择性达到80%~85%.

Liquid-phase Oxidation of Cyclohexane to Cyclohexanone in a Bubble Column Reactor

Liquid-phase air oxidation of cyclohexane to cyclohexanone and cyclohexanol with cobalt napthenate as catalyst was carried out m a continuous bubble column reactor. The effects of reaction conditions including temperature, pressure, residence time of cyclohexane, superficial air velocity and catalyst concentration on cyclohexane conversion and the selectivities to cyclohexanone, cyclohexanol and cyclohexanyl hydroperoxide were studied. When the reaction was conducted m the system temperature range from 413 to 423 K, system pressure range from 1.2 to 1.5 MPa, superficial air velocity range from 2.5 to 3.5 cm/s and cyclohexane residence time of 30-40 min, the cyclohexane conversion of 5%-7% and the total selectivity to cyclohexanone, cyclohexanol and cyclohexanyl hydroperoxide of 80%-85% were obtained.