The Effect of Immiscible Additives on the Batch Reactive Crystallization of a Benzoic Acid Derivative

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Juha Kallas³  Marjatta Louhi-Kultanen³  Pekka Oinas²  Guangyu Yang³  Zuoliang Sha¹ 

[1] Kemira Compound Fertiliser (Zhanjiang) Co., Ltd.;UMIST, Department of Chemical Engineering;Department of Chemical Technology, Lappeenranta University of Technology

关键词: Crystallization;    Immiscible Additive;    Agglomeration;    Crystal Size Distribution;    Filtration;   

DOI  :  10.1252/jcej.35.1140

来源: Maruzen Company Ltd

【 摘 要 】

References(8)In the present study, the effect of different immiscible additives on the reactive crystallization of a benzoic acid derivative from aqueous solution was investigated using the batch operation mode. Monochlorobenzene was used as the main additive, the effects of which on the crystal size distribution, shape and filterability of the crystal end-product were studied. The other immiscible additives studied here were toluene and hexane. The comparison between the studied additives was based on the obtained crystal size distribution. The experimental results of the crystal size distribution showed that monochlorobenzene and toluene were the compounds that resulted in a larger mean particle size. A microscopic study showed that the mean size increased due to the agglomeration of benzoic acid derivative crystals. Furthermore, the influence of the operating conditions, such as the flow rate of the reactant, mixing intensity and initial concentration, on the crystal size distribution was studied. In the presence of monochlorobenzene, the operating conditions affected the crystal size distribution, whereas without the additive, their influence could be ignored. The mechanism of the additive effect is discussed here.

【 授权许可】

Unknown