Purification and separation of durene by static melt crystallization  

静态熔融结晶法提纯均四甲苯（英文）

作　　者：丛山 刘莹 李洪 李鑫钢 张吕鸿 王磊 

机构地区：[1]School of Chemical Engineering,Tianjin University [2]National Engineering Research Center for Distillation Technology [3]Yunnan Jiehua Clean Energy Development Co.,Ltd.

出　　处：《Chinese Journal of Chemical Engineering》2015年第3期505-509,共5页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(21176172);Top Talents Program of Yunnan Province,China(2011HA010)

摘　　要：The purification and separation of durene from the mixture containing durene isomers were studied.Since the boiling points of tetramethyl benzene isomers are very close but their melting points are of great differences,static melt crystallization was applied to separate and purify durene from its isomers.Crystallization experiments were carried out under various operating conditions.The effects of cooling rate,crystallization temperature,sweating temperature and sweating time on the yield and purity of crystal were investigated.Orthogonal experimental design method was adopted to analyze the factors that may affect the yield of durene.Under the optimal crystallization conditions,the purity of durene could reach as high as 99.06%with the yield of 75.3%through one crystallization process.By fitting purification data based on sweating time in isothermal operations,the purification rate coefficient was obtained.The purification and separation of durene from the mixture containing durene isomers were studied.Since the boiling points of tetramethyl benzene isomers are very close but their melting points are of great differences,static melt crystallization was applied to separate and purify durene from its isomers.Crystallization experiments were carried out under various operating conditions.The effects of cooling rate,crystallization temperature,sweating temperature and sweating time on the yield and purity of crystal were investigated.Orthogonal experimental design method was adopted to analyze the factors that may affect the yield of durene.Under the optimal crystallization conditions,the purity of durene could reach as high as 99.06%with the yield of 75.3%through one crystallization process.By fitting purification data based on sweating time in isothermal operations,the purification rate coefficient was obtained.

关 键 词：Durene Static melt crystallization Isothermal sweating Orthogonal experimental design 

分 类 号：TQ241.1[化学工程—有机化工] TQ026.5