摘要
利用熔融结晶技术对粗对苯二甲酰氯进行提纯,考察了结晶终温、发汗终温、降温速率和升温速率对产品纯度和结晶收率的影响,最终确定最佳工艺条件为:降温速率为0.05℃/min,结晶终温为64℃,升温速率为0.1℃/min,发汗终温为76℃,所得产品纯度在99.8%以上。
The crude terephthaloyl dichloride was purified by melting crystallization technology. The effects of the final crystallization temperature, final sweating temperature, cooling rate and heating rate on the purity and crystallization yield of the product were investigated. The optimum technological conditions were determined as follows: the cooling rate is 0.05 ℃/min, the final crystallization temperature is 64 ℃ and the heating rate is 0.1 ℃/min, the final sweating temperature is 76 ℃ and the purity of the product is over 99.8 %.
作者
王俊伟
李改真
李中贤
刘小培
余学军
Wang Junwei;Li Gaizhen;Li Zhongxian;Liu Xiaopei;Yu Xuejun(High&New Technology Research Center of Henan Academy of Sciences,Zhengzhou 450002,China)
出处
《广东化工》
CAS
2020年第15期3-4,共2页
Guangdong Chemical Industry
基金
河南省科学院科研开发专项(200602019)。
关键词
对苯二甲酰氯
提纯
熔融结晶
terephthaloyl chloride
purification
melt crystallization
