摘要
原料过氧化氢异丙苯（CHP）中的Na^+存在于油相中的微量水中，水洗30min后油水分层达到平衡。当CHP和水体积比为5时，Na^+离子脱除率接近100％。催化剂固含率小于0.8%时，反应速率与固含率近似呈线性关系，固含率大于0.8％时，传质扩散过程是反应的控制步骤，固含率的增加对反应速度没有显著影响。同样，在60－90℃范围内，反应温度对总反应速率的影响并不显著，这也是因为传质扩散是控制步骤。另外，反应速率随原料中水含量的增加而下降，因此，必须控制原料中的水含量。采用气液固三相流化床反应器，CHP进料空速可达50h^-1，产物中CHP含量小于0.1%。
Since Na+ exists in the water phase rather than the oil phase (cumene hydroperoxide), the separation of oil and water for Na+ removal reaches equilibrium after water washing and standing for 30 min. When the volumetric ratio of oil to water is 5, nearly 100% of Na+ can be removed from cumene hydroperoxide. When the solid catalyst hold-up in a reactor is less than 0.8%, the rate of decomposition reaction increases linearly with the increase of the solid hold-up. However, when the solids hold-up of catalyst is more than 0.8%, the rate of decomposition hardly increases with the increase of the solid hold-up because mass transfer is now the rate-determining step. Similarly, the influence of reaction temperature on the reaction rate is not as remarkable as expected because mass transfer is depressed. In addition, with the increase of water content, the reaction rate decreases, so the water content in raw material must be controlled to a very low level. Based on the reaction conditions, a novel three-phase circulating fluidized-bed (TPCFB) is proposed and used as the reactor for the decomposition of cumene hydroperoxide. The hot model experiments show that the reaction pr℃eeds steadily and cumene hydroperoxide in the product is less than 0.1% which can meet industrial requirement.
出处
《过程工程学报》
CAS
CSCD
北大核心
2001年第3期304-308,共5页
The Chinese Journal of Process Engineering
