环己基过氧化氢分解工艺流程的优化

Optimization of decomposition process of cyclohexyl hydrogen peroxide

在80 kt/a环己酮装置环己基过氧化氢(CHHP)分解工序工艺现状和CHHP分解反应机理的分析基础上,对分解工序工艺流程进行了优化,改3釜串联流程为2釜串联流程或单釜流程试运行,对比分析了不同工艺流程下CHHP分解反应的停留时间和分解反应收率。结果表明:现有的3釜串联流程因反应停留时间较长,CHHP分解反应收率较低;3釜串联流程改为2釜串联流程,CHHP分解反应停留时间减少,分解反应收率明显提高;3釜串联流程改为单釜流程,CHHP分解反应停留时间也减少,但分解反应收率略有下降;在固定氧化通气量为11000~12000 Nm^(3)/h、循环量为250~270 m^(3)/h、第一分解反应釜温度为88~94℃及碱度为0.9~1.0 mmol/g的条件下,改3釜串联流程为2釜串联流程,分解反应停留时间由37.66 min减少至24.61 min,分解反应收率由83.93%提高至85.43%。

The technological process of cyclohexyl hydrogen peroxide(CHHP)decomposition was optimized based on the current situation of the CHHP decomposition process of an 80 kt/a cyclohexanone plant and the mechanism of CHHP decomposition.The three-reactor series process was transformed into two-reactor series process or single-reactor process.And the residence time and decomposition yield of CHHP were compared and analyzed under different process.The results showed that the long residence time of the three-reactor series process resulted in the low yield of CHHP decomposition;the residence time of CHHP decomposition was reduced and the yield of CHHP decomposition reaction was obviously increased by transforming the three-reactor series process into two-reactor series process;the residence time of CHHP decomposition was also reduced,but the yield of CHHP decomposition was slightly decreased by transforming the three-reactor series process into single-reactor process;and the residence time of CHHP decomposition was decreased from 37.66 min to 24.61 min and the decomposition yield was increased from 83.93%to 85.43%when the three-reactor series process was transformed into two-reactor series process under the conditions of fixed oxidation ventilation of 11000-12000 Nm^(3)/h,circulation rate of 250-270 m^(3)/h,the first decomposition reactor temperature of 88-94℃and alkalinity of 0.9-1.0 mmol/g.