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本文研究了叔胺Ｎ２３５和正辛醇在石油醚稀释剂中，协萃柠檬酸的机理。协萃配合物组成为Ｈ３Ａ·２Ｎ２３５·ｎ－ｏｃｔａｎｏｌ，是一个加成反应，Ｋｆ＝２．６２×１０３。并推测出协萃配合物的结构式，解释了协萃现象
In this paper, the mechanism of synergistic extraction of citric acid with tertiary amine N235 and n-octanol in petroleum ether diluent was studied. The coexisting complex is composed of H3A · 2N235 · n-octanol, which is an addition reaction with Kf = 2.62 × 103. And deduced the formula of the complex compound, which explains the phenomenon of synergistic extraction