氨肟化反应中双氧水分解的影响因素探讨  

Influential factors on hydrogen peroxide decomposition in ammoxiation

作　　者：李红梅[1] 

机构地区：[1]中国石油化工股份有限公司巴陵分公司,湖南岳阳414003

出　　处：《合成纤维工业》2012年第4期34-37,共4页China Synthetic Fiber Industry

摘　　要：在实验装置上对环己酮氨肟化反应体系中引发双氧水分解的因素进行了分析,将实验结果应用于工业化生产。结果表明:在氨肟化反应体系中,氨过量导致的碱性环境、双氧水过量加入或氨肟化反应不完全是双氧水分解的主要原因;反应温度、反应时间等反应条件的变化可改变双氧水的分解速度;微量的铜、铁、铬等金属离子的存在会加速双氧水的分解;适当控制氨浓度、环己酮∶双氧水摩尔比、反应条件及降低金属离子含量有利于提高双氧水的有效利用率;在工业生产装置中,控制反应液中氨质量分数2.0%～2.8%,环己酮∶双氧水摩尔比为1∶(1.05～1.10),反应温度78～81℃,催化剂(相对于环己酮)质量分数小于4%,双氧水利用率提高了3.7%。The influential factors on hydrogen peroxide decomposition were analyzed during eyelohexanone ammoxiation process on an experimental unit. The experimental results was applied in commercial production. The results showed that for ammoxiation reaction system, the principal factors causing the hydrogen peroxide decomposition did not exclusively comprise the alkaline condition in presence of excessive ammonia, excessive hydrogen peroxide and incomplete ammoximation; the reaction conditions in- cluding reaction temperature and time could change the decomposition rate of hydrogen peroxide; the existence of metal ions like trace copper, iron and chromium accelerated the hydrogen peroxide decomposition; and the reasonable control of ammonia content, cyclohexanone/hydrogen peroxide mole ratio, reaction conditions and metal ion content was helpful to improving the effective availability of hydrogen peroxide. The availability of hydrogen peroxide was improved by 3.7% in commercial production when the reaction conditions were controlled as followed ： ammonia mass fraction 2.0% - 2.8%, cyclohexanone ： hydrogen peroxide mole ratio 1 ： （ 1.05 - 1.10）, reaction temperature 78 -81℃, catalyst mass fraction below 4% based on cyclohexanone.

关 键 词：双氧水 分解 环己酮 氨肟化 

分 类 号：TQ203[化学工程—有机化工]