Crown Ether Derivatives of EDTA (Ⅴ)—Synthesis of EDTA-Diaminodibenzocrown Ether Polyconden- sate and Preliminary Study on Their Adsorption Behavior for Some Metal Ions

Abstract

Abstract: EDTAdianhydridc reacted with 4,4' -diaminodibenzocrown ethers or 4,4'-diaminobiphenyl to give polyamido acids 3_a-d, bearing pendant carboxymethyl groups on the chain. 3_a-d were heated under vacuum to form polyimides 4_a-d. The adsorption behavior of the polymers for U(Ⅳ)> U(Ⅵ), Au(Ⅲ) and K( Ⅰ ), etc. was examined. The preliminary experiment shows that the polyamido acids are superior to the polyimides in adsorbability for some metal ions and the cis-polyamido acid 3_d, is the most excellent one among the 8 polymers. 3_a has the capacity of 97.5 mg U(Ⅵ)/g, 976 mg Au(Ⅲ)/g and 10.6 mg K(Ⅰ)/g, respectively.

Key words: EDTA, Crown ether polycondensatc, Synthesis, Adsorption

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Qin Shengying, Liu Zhongqun, Chen Shaojin, Jin Chengchang . Crown Ether Derivatives of EDTA (Ⅴ)—Synthesis of EDTA-Diaminodibenzocrown Ether Polyconden- sate and Preliminary Study on Their Adsorption Behavior for Some Metal Ions[J]. Chem. J. Chinese Universities, 1989, 10(6): 658.

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Crown Ether Derivatives of EDTA (Ⅴ)—Synthesis of EDTA-Diaminodibenzocrown Ether Polyconden- sate and Preliminary Study on Their Adsorption Behavior for Some Metal Ions

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