反应条件对环己醇低温脱氢过程的影响

Effect of Reaction Conditions on Low-Temperature Dehydrogenation of Cyclohexanol

在固定床反应器中,采用Cu系催化剂研究了环己醇低温脱氢合成环己酮的反应,考察了反应温度、反应压力、空速和原料组成对环己醇低温脱氢转化率和选择性的影响。确定较佳的反应条件为:反应温度264~272℃,反应压力为常压,空速0.6~0.8 h^-1,还应控制原料中环己酮和杂质的含量。在264℃、常压、空速0.8 h^-1的条件下,环己醇转化率为65.6%,环己酮选择性为99.0%。

We studied the low-temperature dehydrogenation of cyclohexanol into cyclohexanone in a fixed bed reactor using Cu catalysts,and investigated the effects of reaction temperature,reaction pressure,air velocity,and material composition on the conversion rate and selectivity of low-temperature dehydrogenation of cyclohexanol.The optimal reaction conditions are determined as follows:the reaction temperature of 264-272℃,at the normal reaction pressure,the air velocity of 0.6-0.8 h^-1,and the content of cyclohexanone and impurities in the raw material should be controlled.Under the conditions(namely,at the reaction temperature of 264℃,at the normal pressure,and at the air velocity of 0.8 h^-1),the conversion rate of cyclohexanol is 65.6%,and the selectivity of cyclohexanone is 99.0%.