Batch Cooling Crystallization of an Organic Photochemical with a Low-Speed Intermittent Stirring Technique

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Yoshiyuki Koiwa¹  Kazuaki Iwamoto¹  Masaru Seki¹ 

[1] Engineering Research Laboratory, Sankio Chemical Co. Ltd.

关键词: Fine Chemicals;    Crystallization;    Filtration;    Photochemical Specific Cake Resistance;   

DOI  :  10.1252/jcej.35.1105

来源: Maruzen Company Ltd

【 摘 要 】

References(2)An organic photochemical was crystallized in batches-wise both in laboratory and industrial crystallizers. In the laboratory, crystals were produced at different stirring speeds using a 1 L crystallizer, and the centrifugal filtration tests were conducted for the slurries that were obtained slurries. The average specific resistance was reduced much more than expected from the Kozeny-Carmann equation. This suggested that the a change occurred in the channel structure occurred in the cake composed of the crystalline particles that were obtained. Based on the above laboratory tests, batch crystallization with a low-speed intermittent stirring technique was applied for an actual crystallizer. The filtration time was reduced in the actual plant to about 1/10 of that of the previous conventional stirring crystallization.

【 授权许可】

Unknown