环己醇、环己酮是生产己内酰胺的原料，环己烷通过氧化反应制备上述原料的反应过程在安全性和时空收率等方面仍有挑战。今利用微通道的优异的安全和传热传质性能，采用氧气作为氧化剂，考察内径1 mm，长度5 m的不锈钢微管内环己烷无催化氧化反应的性能，重点考察了不同工艺条件，包括反应温度、反应压力、气液摩尔比和反应停留时间对环己烷氧化性能的影响。在180℃，压力1.5 MPa，氧气与环己烷的摩尔比为0.3：1，停留时间为1.5 min时，环己烷的转化率为3.93%，环己醇的选择性为23.39%，环己酮的选择性为35.95%，己二酸的选择性为26.71%，环己基过氧化氢选择性为4.78%。实验表明，微管内环己烷无催化氧化是可行的，且有一定的效果，尤其是反应时间短且安全性高，为慢反应在微管内的反应提供了借鉴。%Cyclohexanone and cyclohexanol are important raw materials for caprolactam production, and their production from non-catalytic oxidation of cyclohexane still has problems in safety and time space yield. In this paper, non-catalytic oxidation of cyclohexane was investigated in a microcapillary reactor which was made by a stainless steel tube with diameter of 1 mm and length of 5 m. Such tubes have good safety records and excellent mass and heat transfer properties. Effects of temperature, pressure, gas-liquid molar ratio and residence time on catalytic performance were studied. When the reaction is couducted under conditions of temperature 180℃, pressure 1.5 MPa, gas-liquid molar ratio 0.3 and residence time 1.5 min, the results show that the conversion of the non-catalytic cyclohexane oxidation is 3.93%, and the selectivities of cyclohexanol, cyclohexanone, adipic acid and CHHP are 23.39%, 35.95%, 26.71% and 4.78%, respectively. This study indicates that cyclohexane non-catalytic oxidation in microcapillary tubes to produce KA oil is feasible with good safety and short reaction time, which provides references to slow reaction in microcapillary.
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