Extraction of Citric Acid with Primary Amine N1923

Chem. J. Chinese Universities ›› 1992, Vol. 13 ›› Issue (9): 1153.

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Extraction of Citric Acid with Primary Amine N1923

WANG Zhi-Hua, GAO Zi-Li, SUN Si-Xiu, SHEN Jing-Lan

Department of Chemistry, Shandong University, Jinan, 250100

Received:1991-08-26 Revised:1991-11-06 Online:1992-09-24 Published:1992-09-24

Abstract

Abstract: The extraction of citric acid(H₃A) from its aqueous solution with primary amine N1923(B) in kerosene was studied at 298±1K.The extraction equilibrum can be expressed as B_(o)+_iH₃AB·_iH₃A (i=2/3;1).15%(V/V) high-carbon alcohol Al416(Chinese trade mark) was used as a modifier in organic phase.It was found that the probable component of the extracted complexes were B·(2/3)H₃A and B·H₃A which were confirmed by the mathods of isomolar series,saturatrion extraction,plot n/[H₃A] versus [H₃A] and the infrared spectra.The extraction capacity of inorganic acids and citric acid by N1923 is in the order of HCl HNO₃HClO₄>H₃A.The possibility of stripping of citric acid from organic phase with aqueus solution containing hydrochloride is discussed.

Key words: Extraction equlibrium, Citric acid, Primary amine N1923

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WANG Zhi-Hua, GAO Zi-Li, SUN Si-Xiu, SHEN Jing-Lan . Extraction of Citric Acid with Primary Amine N1923[J]. Chem. J. Chinese Universities, 1992, 13(9): 1153.

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Extraction of Citric Acid with Primary Amine N1923

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