二茂铁升华精制工艺的研究节能减排

Sublimation process of ferrocene

升华法可以直接获得二茂铁产品,能耗低,过程不产生废水,研究开发该提纯工艺具有重要的经济效益和环保效益。文中采用升华法,考察了加热温度、惰性粒子以及氮气等因素对二茂铁纯度和收率的影响。研究结果表明:升华温度低于160℃产品纯度(质量分数)可达99%以上,温度高于160℃,产品纯度下降;升华过程中原料会产生团块,对产品收率影响显著,减少或破碎团块有助于产品收率的提高;惰性粒子对产品纯度基本无影响,但能强化热质传递,分散物料,减少团块的产生,提高产品收率;氮气的通入能加快二茂铁的升华,但由于夹带固体杂质会使产品纯度下降。

Purified ferrocene was directly obtained by sublimation method, which was featured by low energy consumption and no wastewater. The development of the purification process has important economic and environmental benefits. The impact of heating temperature, inert particles and nitrogen on the yield and purity of ferrocene was studied in the sublimation process. The research shows that ferrocene purity （mass fraction ） can reach more than 99% when sublimation temperature is below 160 ~C ; the purity decreases while the temperature is higher than 160 ~C. During the process of sublimation, the clumps produced have an significant influence on the product yield. Reducing or destroying clumps help improving the ferroeene yield. The inert particles have no influence on the purity of ferrocene, but can enhance the heat and mass transfer, disperse materials and reduce clumps size, thus increasing the ferrocene yield. The sublimation of ferrocene can be accelerated by accessing nitrogen, but the ferrocene purity is declined due to the solid impurities entrained.