伯胺N1923萃取柠檬酸的研究

Extraction of Citric Acid with Primary Amine N1923

以伯醇A1416作有机相调节剂(15％,V/V),对照考察了N1923-煤油-A1416(15％,V/V)溶液对HCI、HNO_3和HClO_4的萃取,发现在相同条件下N1923萃取酸的顺序为HCl(?)HNO_3(?)HClO_4>H_3A.讨论了用盐酸反萃取含H_3A有机相的可能性.

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)+iH3A B·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=-HNO3=HC1O4>H3A.The possibility of stripping of citric acid from organic phase with aqueus solution containing hydrochloride is discussed.