氯化钙在甲醇水溶液中的结晶  

Crystallization of Calcium Chloride in Methanol-aqueous Solution

作　　者：王农[1] 孟庆洛 王兴权[1] 

机构地区：[1]兰州交通大学化学与生物工程学院甘肃省植物源生物农药工程技术研究中心,甘肃兰州730070

出　　处：《化学世界》2014年第10期601-604,627,共5页Chemical World

基　　金：甘肃省科技支撑计划项目(1204NKCA107);甘肃省工程技术研究中心项目(1106NTGA013);兰州交通大学"青蓝"人才工程基金资助项目;金川公司预研基金资助项目(JCYY2013008)

摘　　要：通过显微镜,观察了氯化钙在甲醇水溶液中的结晶情况,发现在不同的结晶方法和条件下会形成许多不同形状的结晶体,有立方形、片形、三角形、六角形、十字形、六边形等;研究了结晶体的形状和大小与结晶温度、结晶时间和溶液浓度等的关系,发现在蒸发结晶过程中,开始形成的结晶体棱角分明,随着静置时间的延长,小颗粒溶解,大颗粒长大,结晶体的棱角趋于平缓,形状趋于一致,形成不规则多面体;浓度较高时,形成的结晶体粒度较小,浓度较低时形成的结晶体粒度较大;与蒸发结晶相比,自然结晶出的颗粒较大,而通过蒸发结晶出的颗粒较小,并初步探讨了结晶现象的本质规律。The crystallization of calcium chloride in methanol-aqueous solution was observed under an optical microscope.Many different shaped crystals were formed with different crystallization methods and conditions,such as cube,flake,triangle,hexagon,cross let and so on.The relationship between shape and size of the crystals with crystallization temperature,crystallization time and solution concentration was studied.It was found that the particles were chiseled when the crystals began to form,as time went on the small particles dissolved and the large particles grew up,the edges and corners of the crystals were flattened and then the shape began to converge and form irregular polyhedron.The crystal grain size decreased with the concentration of the solution.As compared with the evaporation crystallization method,the crystals formed by natural crystallization were bigger in size.The essential law of crystallization phenomenon was preliminarily discussed.

关 键 词：氯化钙 甲醇 络合物 结晶 形状 大小 

分 类 号：O631[理学—高分子化学]