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1.实验证明,氢氧化钠对异丙苯过氧化氢具强分解能力,因而支持前文提出的,在氢氧化钠或异丙苯过氧化氢钠盐存在下,异丙苯氧化的初期快速吸氧是由于碱对异丙苯过氧化氢作用,产生自由基而引起反应链。 2.在氢氧化钠存在下,异丙苯氧化过程分为两个阶段。在第一阶段,快速吸氧伴以氢氧化钠的大量消耗;在第二阶段,较慢吸氧伴以很少的氢氧化钠消耗。 3.分离和鉴定氢氧化钠催化分解异丙苯过氧化氢的产物,其中含18％酸性产物,主要为苯甲酸、甲酸和碳酸。碱将这些酸变化为钠盐,从而减少异丙苯过氧化氢酸分解产物链抑制剂苯酚的生成,使氧化可继续以较高速率进行。 4.曾观察以上各酸的钠盐对异丙苯氧化过程的影响。虽然独立实验显示这些盐并不分解异丙苯过氧化氢,因而可以孰为弄丙苯过氧化氢的碱分解酸性产物,经形成钠盐后,对氧化过程并无显著作用,但在氧化实验中,这些盐确以不同程度消除或缩短誘导期和自动催化期,表现对链引发过程的影响。
1. Experiments show that sodium hydroxide on cumene hydroperoxide with strong decomposition capacity, thus supporting the previously proposed, in the presence of sodium hydroxide or cumene hydroperoxide in the presence of cumene oxidation of the rapid initial absorption Oxygen is due to the base of cumene hydrogen peroxide role in generating free radicals and lead to the reaction chain. In the presence of sodium hydroxide, cumene oxidation is divided into two stages. In the first phase, rapid oxygen uptake is accompanied by heavy consumption of sodium hydroxide; in the second phase, slower oxygen uptake with less sodium hydroxide consumption. 3. Separation and identification of sodium hydroxide catalytic cumene hydroperoxide product, which contains 18% acidic products, mainly benzoic acid, formic acid and carbonic acid. Alkali changes these acids to sodium salts, reducing the generation of cumene, a cumene hydroperoxide acid decomposition product chain inhibitor, so that oxidation can continue at a higher rate. 4. Have observed the above acid sodium salt of cumene oxidation process. Although independent experiments show that these salts do not decompose cumene hydroperoxide, it is possible to determine whether the alkali decomposes the acidic product of propylbenzene hydroperoxide and which does not have a significant effect on the oxidation process after the sodium salt is formed. However, in the oxidation experiment , These salts, to varying degrees, eliminate or shorten the induction period and autocatalytic period, the performance of the chain initiation process.