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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received June 8, 2017
Accepted August 20, 2017

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Effective separation of succinic acid by combined crystallization

Eun Hye Kim Seong-Sik You¹ Jeong Won Kang^†

Department of Chemical and Biological Engineering, Korea University, 5-1, Anam-dong, Sungbuk-gu, Seoul 02841, Korea ¹School of Energy, Material & Chemical Engineering, Korea University of Technology and Education, 1600 Chungjeol-ro, Byeongcheno-myun, Dongnam-gu, Cheonan 31253, Korea

jwkang@korea.ac.kr

Korean Journal of Chemical Engineering, January 2018, 35(1), 204-209(6), 10.1007/s11814-017-0232-9

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Abstract

Succinic acid, which is widely used as a building block chemical, can be produced from either petroleum or renewable resources. Bio-based production of succinic acid requires several purification steps, and the yield of any particular separation method is an important factor in facilitating an economic design. Crystallization is a common method for the purification of succinic acid, and several driving forces can be used to generate solubility changes in the solution. In this work, three driving forces of crystallization - cooling, acidification, and salting out - were examined individually and combined to achieve maximum yield from a solution of succinic acid. It was found that combined crystallization can significantly improve the yield (97.08%) compared with conventional cooling crystallization (84.31%) or acidification (66-67%). Additionally, a basic kinetic study was performed, and a total of 7minutes of batch operation was sufficient to produce the maximum amount of crystals.

Keywords

Cooling Crystallization Acidification Salting-out Crystallization Succinic Acid

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