Integration of Multiple Side-Draw Distillation and Continuous Crystallization for Refining of High-Purity p- and o-Nitrochlorobenzene
Methods of separating mixed isomers of nitrochlorobenzene (NCB) were reviewed and analyzed in this paper, A new integrated technology including multiple side-draw distillation and continuous crystallization was raised for refining of high-purity p-nitrochlorobenzene(p-NCB) and o-nitrochlorobenzene(o-NCB) from the NCB mixture. Eventually, over 99% purity of p-NCB and o-NCB can be obtained, and the comprehensive yield is higher than 90%. Compared with the traditional process, the new technology has obvious advantages due to its simple process, high separation efficiency, and low energy consumption.
Zhong Cao, Lixian Sun, Xueqiang Cao, Yinghe He
Q. Q. Huang et al., "Integration of Multiple Side-Draw Distillation and Continuous Crystallization for Refining of High-Purity p- and o-Nitrochlorobenzene", Advanced Materials Research, Vols. 233-235, pp. 926-929, 2011