Purification by solid layer melt crystallization

被引:13
作者
Ulrich, J
Neumann, M
机构
[1] Universität Bremen, Verfahrenstechnik/FB4, D-28334 Bremen
来源
JOURNAL OF THERMAL ANALYSIS | 1997年 / 48卷 / 03期
关键词
caprolactam; dynamic mode; melt crystallization; plant design; static mode;
D O I
10.1007/BF01979499
中图分类号
O414.1 [热力学];
学科分类号
摘要
The application of solid layer crystallization techniques in industry is arousing ever more interest. One reason is the increasing demand for ultrapure products, and another is the energy-saving potential of this separation technology. This article examines solid layer melt crystallization as concerns its purification efficiency. The crystallization process was carried out in two different modes, whereby the process parameters were varied and post-crystallization treatments were additionally applied. The experimental results were used as the basis for a mathematical fit of a semi-empirical expression which predicts the purification efficiency. It was used for a design of different multistage plants, which operate with different crystallization strategies. One result is that a comparable product quality is attainable with a simple process technique in combination with post-crystallization treatments, instead of a more complicated and therefore more expensive process technique.
引用
收藏
页码:527 / 533
页数:7
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