氨肟化法制备环己酮肟的工艺条件的优化

Conditions for the Preparation of Cyclohexanone Ammoximation Process

通过工业试验,研究以HTS新型钛硅分子筛催化环己酮、H2O2和氨反应一步合成环己酮肟反应中新工艺中催化剂浓度、进料配比、反应温度以及反应停留时间的影响。结果表明,适宜的反应工艺条件为:催化剂浓度稳定在3.0%～6.0%(ω),进料中n(H2O2)∶n(环己酮)=1.05,反应釜氨含量控制在2.2%～3.2%(ω),反应温度为80～85℃,物料的平均停留时间为70 min。环己酮氨肟化反应转化率和选择性均大于99%,并通过优化使环己酮肟的质量进一步提高。

Through the industrial test based on HTS model of titanium silicon molecular sieve catalytic cyclohexanone, H2 O2 and ammonia in one step synthesis of cyclohexanone oxime reaction process of catalyst concentration, feed ratio, reaction temperature and reaction residence time effect were studied. The results showed that the reaction suitable technological conditions were the concentration of catalyst stability in 3% -6% （to）, the feeding of n（ H2O2 ）/n （eyelo- hexanone） = 1.05, the reactor ammonia content control in 2.2% -3.2% （ω）, the reaction temperature 80 - 85 ℃, and the average residence time of materials for 70 min. Cyclohexanone ammoximation reaction conversion rate and selectivity were greater than 99%, and the quality of cyclohexanone oxime was further improved through the optimization.