Seeded Batch Cooling Crystallization of Adipic Acid from Ethanol Solution

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Shigeko Sasaki¹  Masaaki Yokota¹  Norihito Doki¹  Hiroaki Nakamura¹  Noriaki Kubota¹ 

[1] Department of Chemical Engineering, Iwate University

关键词: Batch Cooling Crystallization;    Seeding Effect;    Adipic Acid;    Ethanol Solution;    Crystal Shape;   

DOI  :  10.1252/jcej.36.1001

来源: Maruzen Company Ltd

【 摘 要 】

References(9)Cited-By(4)Adipic acid was crystallized by cooling in a batch crystallizer. At low seed loadings, the product crystal size distribution (CSD) was bi-modal because of enormous secondary nucleation. However, at high seed loadings, it became uni-modal, where the crystallization was dominated by seed growth with practically no secondary nucleation. Enough seeding was thus effective in suppressing nucleation during batch crystallization. The mean mass size of the product crystals obtained at high seed loadings agreed with that calculated by a simple mass balance assuming growth-dominated crystallization with no change in the number of crystals during operation and no residual supersaturation towards the end of batch. The products obtained, i.e., grown seeds, were not well faceted but rounded, probably because of abrasion caused by mechanical impact induced by agitation.

【 授权许可】

Unknown