Osmotic Dehydration of Bentonite Slurry Using Hypertonic Polymer Solution

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Nobuyuki Katagiri¹  Masashi Iwata²  Hiroshi Tsuchiya¹  Eiji Iritani¹ 

[1] Department of Chemical Engineering, Nagoya University;Department of Chemistry and Biochemistry, Suzuka National College of Technology

关键词: Osmotic Dehydration;    Hypertonic Solution;    Dialysis Membrane;    Consolidation;    Bentonite;   

DOI  :  10.1252/jcej.40.98

来源: Maruzen Company Ltd

【 摘 要 】

References(20)Osmotic dehydration experiments of “difficult- to-filter” bentonite slurry were conducted with the aid of the high osmotic pressure brought about by hypertonic solution. In the experiments, osmotic dehydration was conducted by submerging a dialysis membrane tube containing bentonite slurry in polyethylene glycol solution. It was found that this method is quite effective for dehydration of “difficult-to-filter” slurry. It was clarified that the dehydration behaviors can be analyzed separately divided into two parts; filtration and subsequent consolidation. In the filtration period, the dehydration behaviors were well described by the Ruth filtration rate equation, in consideration of the compressibility of the filter cake. Also, the dynamic behaviors of dehydration in the consolidation period were accurately described by the modified Terzaghi model. The variations over time of the mass of the bentonite slurry during osmotic dehydration were well evaluated using in combination with the Ruth filtration rate equation and the modified Terzaghi model.

【 授权许可】

Unknown