Separation and PurificationHomologous Compounds byof Dodecanedioic Acid from Its Falling Film Crystallization

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Separation and PurificationHomologous Compounds byof Dodecanedioic Acid from Its Falling Film Crystallization

LI Yu; LIU Youzhi; QI Xueqin

Department of Chemical Engineering, North China Institute of Technology, Taiyuan 030051, China

Received:1900-01-01 Revised:1900-01-01 Online:2004-06-28 Published:2004-06-28
Contact: LI Yu

应用降膜结晶法将十二烷二酸从同系物中分离及精制

李裕; 刘有智; 齐雪琴

Department of Chemical Engineering, North China Institute of Technology, Taiyuan 030051, China

通讯作者: 李裕

Abstract

Abstract: Separation and purification of dodecanedioic acid (DDDA) from its homologous compounds were studied experimentally by falling film crystallization (FFC). The influences of various operation parameters, including crystallizing time, flow rate of melt and temperature of glycerine bath, on purity of DDDA and crystallizing rate were investigated. Over 99% (by mole) DDDA was obtained for a feed composition of 96% (by mole). The main factors affecting the separation efficiency are flow rate of melt and temperature of glycerine bath. The crystallizing layer of DDDA was further purified by sweating and blasting. A set of optimized operation data are provided for better understanding the mechanism of heat and mass transfer in FFC, and for further industrial application of DDDA purification process.

Key words: dodecanedioic acid, homologous compound, falling film crystallization, separation, purification

摘要： Separation and purification of dodecanedioic acid (DDDA) from its homologous compounds were studied experimentally by falling film crystallization (FFC). The influences of various operation parameters, including crystallizing time, flow rate of melt and temperature of glycerine bath, on purity of DDDA and crystallizing rate were investigated. Over 99% (by mole) DDDA was obtained for a feed composition of 96% (by mole). The main factors affecting the separation efficiency are flow rate of melt and temperature of glycerine bath. The crystallizing layer of DDDA was further purified by sweating and blasting. A set of optimized operation data are provided for better understanding the mechanism of heat and mass transfer in FFC, and for further industrial application of DDDA purification process.

关键词: 分离工艺;提纯技术;酸;化合物;结晶化;DDDA

LI Yu, LIU Youzhi, QI Xueqin. Separation and PurificationHomologous Compounds byof Dodecanedioic Acid from Its Falling Film Crystallization[J]. , DOI: .

李裕,刘有智,齐雪琴. 应用降膜结晶法将十二烷二酸从同系物中分离及精制[J]. , DOI: .

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