氨肟化反应中影响双氧水分解因素浅析

Ammoximation of analysis on the factors influencing the hydrogen peroxide decomposition reaction

本文对环己酮氨肟化反应体系中引发H2O2分解的因素进行了研究,针对各种影响因素提出控制H2O2分解的优化措施。结果表明:在氨肟化反应体系中,NH3过量导致的碱性环境、H2O2过量加入或H2O2浓度过高以及氨肟化反应不完全,是引起H2O2分解的主要原因;反应温度、反应压力等操作条件的变化也可改变H2O2的分解速度;微量的锰、锌、铜、铁、镍等金属离子的存在,也会大大加速H2O2的分解。控制适当的NH3浓度及酮/H2O2摩尔比、反应条件以及降低金属离子含量有利于提高H2O2的有效利用率,这些结果可以为优化氨肟化反应工艺、降低H2O2消耗提供依据。

This article in the reaction of cyclohexanone ammoximation studied factors that cause decomposition of hydrogen peroxide, for optimization of various influencing factors controlled decomposition of hydrogen peroxide. Results showed that： in ammonia oxime of reaction system in the ammonia excessive led to of alkaline environment, and hydrogen peroxide excessive joined or hydrogen peroxide concentration high and ammonia oxime of reaction does not full is caused hydrogen peroxide decomposition of main causes; reaction temperature, and reaction pressure, operation conditions of changes also can change hydrogen peroxide of decomposition speed; trace of MN, and zinc, and copper, and iron, and nickel, metal ion of exists also will greatly accelerated hydrogen peroxide of decomposition. Proper control of cyclohexanone/Mole ratio of hydrogen peroxide and ammonia concentration, reaction conditions, and reduce metal ions concentration is conducive to raising the effective utilization of hydrogen peroxide, these results can be optimized ammonium-oximation process, provide a basis for reducing the consumption of hydrogen peroxide.