Volume 43, Issue 6 pp. 1072-1078
Research Article

Crystallization and Purification of 4,4′-Diaminodiphenyl Ether

Jianxin Chen

Corresponding Author

Jianxin Chen

Hebei University of Technology, School of Chemical Engineering and Technology, 300130 Tianjin, China

Hebei University of Technology, National-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization, 300130 Tianjin, China

Correspondence: Jianxin Chen ([email protected]), School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China; Qing Wu ([email protected]), School of Artificial Intelligence, Hebei University of Technology, Tianjin, 300130, China.Search for more papers by this author
Fengjiang Chen

Fengjiang Chen

Hebei University of Technology, School of Chemical Engineering and Technology, 300130 Tianjin, China

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Jian Han

Jian Han

Hebei University of Technology, School of Chemical Engineering and Technology, 300130 Tianjin, China

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Min Su

Min Su

Hebei University of Technology, School of Chemical Engineering and Technology, 300130 Tianjin, China

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Kaili Liu

Kaili Liu

Hebei University of Technology, School of Chemical Engineering and Technology, 300130 Tianjin, China

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Yinhui Li

Yinhui Li

Hebei University of Technology, School of Chemical Engineering and Technology, 300130 Tianjin, China

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Qing Wu

Corresponding Author

Qing Wu

Hebei University of Technology, School of Artificial Intelligence, 300130 Tianjin, China

Correspondence: Jianxin Chen ([email protected]), School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China; Qing Wu ([email protected]), School of Artificial Intelligence, Hebei University of Technology, Tianjin, 300130, China.Search for more papers by this author
First published: 12 March 2020
Citations: 5

Abstract

The purification of 4,4′-diaminodiphenyl ether (ODA) was investigated. ODA, which contained impurities, was sublimated and anti-solvent (ethanol)-crystallized in N-dimethylformamide (DMF). Fourier transform infrared (FTIR) results revealed that the sublimated crystal was basically identical with the pure ODA sample. The influence of different amounts of ethanol on particle size distribution was analyzed during anti-solvent crystallization. The morphology of the ODA crystal was examined by scanning electron microscopy (SEM). The color of the sample enhanced from a brown powder to a colorless granular crystal. The purity of the sample could be increased from about 30 % to 87 %. With the operations of sublimation and anti-solvent crystallization, the purity, crystal morphology, and particle size distribution of ODA were significantly improved.

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