固体超强碱催化分解环己基过氧化氢的工艺研究

Catalytic decomposition of cyclohexyl hydroperoxide by solid superbase

以水合三氧化二铝为载体,在340℃下加入20 g氢氧化钠及金属钠制得固体超强碱催化剂,采用该固体超强碱对环己基过氧化氢进行催化分解;考察了反应温度、反应时间及催化剂用量等因素对分解反应的影响。结果表明:在100 mL氧化液中,加入催化剂4.0～6.0 g,反应温度55～60℃,分解时间35～45min,采用4釜串联,环己基过氧化氢分解转化率大于等于99%,环己酮与环己醇的总收率大于等于95%,且无废液碱产生。

A solid superbase catalyst was prepared by using aluminium trihydroxide as carrier and adding 20 g sodium hydroxide and metal sodium at 340 ℃, which was used for cyclohexyl hydroperoxide catalytic decomposition. The effects of reaction temperature and time and catalyst amount on the decomposition reaction were investigated. The results showed that the conversion rate of cyclohexyl hydroperoxide was not less than 99%, the total yield of cyclohexanone and cyclohexanol was not less than 95% and no spent caustic yielded when the process conditions were as followed： 4.0 - 6.0 g catalyst in 100 mL oxidation liquid, reaction temperature 55 -60 ℃, decomposition time 35 -45 min, four reactors in series.