三相循环床中树脂催化过氧化氢异丙苯分解 Ⅰ.工艺条件研究

Decomposition of Cumene Hydroperoxide Catalyzed by Resins in a Three-Phase Circulating Fluidized Bed Reactor Ⅰ.Reaction Process

针对树脂催化过氧化氢异丙苯分解反应的特点 ,设计了新型气、液、固三相循环流化床反应器。该反应器接近全混流反应器 ,解决了工程放大存在的树脂破碎与传质和传热的矛盾。适宜的反应温度为 70～ 80℃ ,此时进料 (过氧化氢异丙苯 ) /(丙酮 )约为 1∶3 ,产物的选择性不低于硫酸催化工艺。进料过氧化氢异丙苯空速为 3 0h- 1 时 ,产品中过氧化氢异丙苯的质量分数 <0 .1%。催化剂的失活是其吸附原料中的Na+ 所致 ,催化剂的寿命与原料中的Na+ 含量成反比。当Na+ 质量分数为 2× 10 - 6 时 ,催化剂的寿命可达 160 0 0倍。

WT5BZ]A novel three-phase cycling fluidized bed reactor,designed on the basis of reaction characteristics,and comparable to a mixed flow reactor,was used for decomposing cumene hydroperoxide(CHP) catalyzed by resin,with very well mass transfer and heat transfer and almost no resin breakage during the operation.The optimal reaction temperature is 70～80 ℃,volume ratio of acetone and CHP is about 3 and selectivity is no less than that of the conventional process catalyzed by H 2SO 4.When the WHSV of CHP is 30 h -1 ,CHP in products is less than 0 1% which meets the industrial requirement.Resin deactivation is caused by Na + from CHP;the lifetime of the resin is inversely proportional to the Na + content.When the Na + content is below 2×10 -6 ,a part of resin in weight can decompose about 16 000 parts of CHP before it must be regenerated. [