乌洛托品在真空蒸发结晶器里结晶的动力学研究

摘要本文探讨了乌洛托品在真空蒸发结晶器里结晶的动力学,并对影响结晶的各种主要参数做了较细致的研究。发现在真空蒸发结晶的条件下,乌洛托品有其独特的结晶特性,二次成核的动力学方程式可用下式表达: B~*=39.94G1.10MT-1.17(TIPS)1.68 通过对动力学方程的研究发现,对于象乌洛托品这样的晶体生长速率指数接近于1的体系,靠简单的增加晶体在结晶器中的停留时间来增加产品的平均粒径是办不到的。而且还发现,由于搅拌桨周边转速对二次成核的影响最大,因而为了得到一个比较满意的产品粒度与粒度分布,合理地选择搅拌浆周边转速是个关键问题。

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	张又文
	钱如莹
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Abstract： Hexamethylenetetramine crystallization kinetics is determined in a vacuum evaporation crystallizer with related Parameters. It is interesting to note that the crystallization of hexamethylenetetramine has special characteristics under Vacuum evaporation. The kinetics evaluated in this study is correlated by the equation: B°=39.94G1.1M_T-1.17 (TIPS) 1.68 It is shown that, for the system of hexamethylenetetramine with the index of crystal growth rate approximating to 1, the increase of the average crystal size of the product can not be obtained by simply increasing the crystal retention time. In order to obtain satisfactory size and size distributions of the product, it is very important to choose agitation speed because secondary nucleation is very much dependent on it.

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Received 1989-10-15; published 1989-10-15

引用本文:

张又文;钱如莹;.乌洛托品在真空蒸发结晶器里结晶的动力学研究[J]. 化学工业与工程, 1989,6(4): 17-24

Zhang You-Wen .Crystallization Kinetics of Hexamethylenetetramine in a Vacuum Evaporation Crystallizer[J]. Chemcial Industry and Engineering, 1989,6(4): 17-24