Seeding Effect on Batch Crystallization of Potassium Sulfate under Natural Cooling Mode and a Simple Design Method of Crystallizer

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Donepudi Jagadesh¹  Masaaki Yokota¹  Norihito Doki¹  Akira Sato¹  Noriaki Kubota¹ 

[1] Department of Applied Chemistry and Molecular Science, Iwate University

关键词: Crystallization;    Batch Cooling Policy;    Seeding;    Potassium Sulfate;    Crystal Size Distribution;   

DOI  :  10.1252/jcej.32.514

来源: Maruzen Company Ltd

【 摘 要 】

References(14)Cited-By(33)Potassium sulfate was crystallized in a seeded batch cooling crystallizer with no temperature control or natural cooling. Above a critical seed concentration, uni-modal product of grown seeds was obtained even under a natural cooling mode with practically no nucleation. This ideal growth of seed crystals is contrary to the common belief that a natural cooling mode produces small size products with enormous secondary nucleation. The critical seed concentration can be determined easily with data from a laboratory crystallizer on the seed chart, in which the product mean mass size normalized with the seed mean mass size is plotted as a function of seed concentration with seed size as a parameter. A simple and practical method to design a batch crystallizer to be operated with no nucleation has been proposed.

【 授权许可】

Unknown