Volume 41, Issue 2 pp. 337-344
Research Article

Fabrication of Solvent-Resistant Copolyimide Membranes for Pervaporation Recovery of Amide Solvents

Rong Xu

Rong Xu

Changzhou University, Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Gehu Road, 213164 Changzhou, China

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Meng Guo

Meng Guo

Changzhou University, Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Gehu Road, 213164 Changzhou, China

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Jin Wang

Jin Wang

Changzhou University, Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Gehu Road, 213164 Changzhou, China

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Qi Zhang

Qi Zhang

Changzhou University, Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Gehu Road, 213164 Changzhou, China

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Jing Zhong

Corresponding Author

Jing Zhong

Changzhou University, Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Gehu Road, 213164 Changzhou, China

Correspondence: Jing Zhong ([email protected]), Changzhou University, Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Gehu Road, Changzhou 213164, China.Search for more papers by this author
First published: 15 November 2017
Citations: 11

Abstract

Dimethylformamide and dimethylacetamide are important industrial chemicals, which are used, e.g., as solvents in the manufacturing of polyurethane products. They are conventionally recovered by distillation associated with high energy consumption and operating costs. In contrast, pervaporation is an energy-efficient membrane separation method. Ceramic-supported copolyimide membranes were synthesized via the two-step thermal imidization method and applied to pervaporation recovery of dimethylformamide and dimethylacetamide. The prepared membrane demonstrated high resistance to the two amides in a wide concentration range. Effects of operating parameters such as feed temperature and feed concentration on pervaporation performances were investigated. The results showed that the copolyimide membrane is a promising candidate for the recovery of high concentrations of amide solvents.

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