溶剂对对苯二酚晶体晶习的影响  

Effects of solvents on crystal habit of hydroquinone

作　　者：李小娜[1] 尹秋响[1] 陈巍[1] 王静康[1] 高海见[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《化工学报》2006年第3期480-485,共6页CIESC Journal

摘　　要：采用冷却结晶方法,考察了水、甲醇、乙醇、正丙醇、异丙醇和正丁醇等溶剂对对苯二酚晶习的影响,并通过扫描电镜、差热扫描分析、X射线衍射等手段对对苯二酚晶体进行了分析表征.结果表明,溶剂性质显著影响对苯二酚晶体的晶习,随着溶剂介电常数的减小,晶体的长径比变小.在利用分子模拟软件Cerius2预测对苯二酚晶体晶习的基础上,初步揭示了溶剂影响对苯二酚晶体晶习的机理.The effects of solvents such as water, methanol, ethanol, 1-propanol, 2-propanol and 1-butanol on the crystal habit of hydroquinone were studied. Growth experiments of hydroquinone single crystals were performed in a jacket crystallizer by cooling crystallization. Scanning electron microscopy, differential scanning calorimetry, powder X-ray diffractometry and single crystal X-ray diffractometry were used to characterize the produced crystals. The experimental results showed that the crystal habit of hydroquinone was evidently influenced by the property of solvents. The length-diameter ratio of the hydroquinone crystal decreased with the dielectric constant of solvent. Based on the theoretic prediction by Cerius^2 software, the mechanism of the effect of solvent on the crystal habit of hydroquinone was analyzed.

关 键 词：对苯二酚 结晶 溶剂效应 晶习 

分 类 号：TQ026.5[化学工程]