第３級長鎖アルキルアミンの有機溶液によるコハク酸の抽出平衡に対する有機溶媒の影響

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  • Effect of organic solvent on extraction equilibria of succinic acid with tertiary long-chain alkylamine.
  • ダイ 3キュウ チョウサ アルキルアミン ノ ユウキ ヨウエキ ニ ヨル コハ

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Distribution equilibria of succinic acid in aqueous solution into organic solvents and in organic solutions of tri-n-octyl amine were measured for various concentrations at 303K. The.succinic acid dissolved as the monomeric species in organic solvents. The distribution coefficients of the acid varied in the order of hexane < benzene < chloroform < methyl isobutyl ketone. The acid hardly dissolved in carbon tetrachloride. The species formed and the equilibrium constants for the reactions between the acid, A, and the ammine, B, were estimated by graphical analysis. The experimental results were interpreted by the following reaction models.<BR>(1) The amine in organic solution reacts with the acid to form AB species in the solvents.<BR>(2) The species AB further reacts with A or AB to form (AB)5 in benzene or A2B in methyl isobutyl ketone.<BR>The formation constants for the species were estimated by use of the above reaction models.

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