SYNERGISTIC EXTRACTION OF Cd(II) WITH PRIMARY AMINE N-1923 AND NEUTRAL ORGANOPHOSPHORUS REAGENTS

Acta Metall Sin

1989, Vol. 25

Issue (1): 104-110 DOI:

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SYNERGISTIC EXTRACTION OF Cd(II) WITH PRIMARY AMINE N-1923 AND NEUTRAL ORGANOPHOSPHORUS REAGENTS

MA Genxiang;LI Deqian Changchun Institute of Applied Chemistry; Academia Sinica

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MA Genxiang;LI Deqian Changchun Institute of Applied Chemistry; Academia Sinica. SYNERGISTIC EXTRACTION OF Cd(II) WITH PRIMARY AMINE N-1923 AND NEUTRAL ORGANOPHOSPHORUS REAGENTS. Acta Metall Sin, 1989, 25(1): 104-110.

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Abstract The synergistic extraction of Cd (Ⅱ) with primary amine N--1923and neutral organophosphorus reagents (TBP, DBBP, B) from hydrochloric acidhas been investigated at μ=0.5, t=25℃. The compositions of the synergisticextraction complexes and the mechanism of the synergistic extraction have beendatermined by the methods of slope and constant mole. The synergistic extractioncomplexes with composition (RNH_3C1)_2. CdCl_2.B have been demonstrated. Thesynergistic extraction reactions and additional reaction of Cd (Ⅱ) have beenproposed as follows:CdCl_2+2RNH_3Cl_(o)+B_(o)?(RNH_3Cl)_2. CdCl_2.B_(o)(RNH_3Cl)_3. CdCl_2_(o)+B_(o)?(RNH_3Cl)_2.CdCl_2.B_(o)+RNH_3Cl_(o)In addition, the equilibrium constants and the thermodynamic functions of the syn-ergistic extraction reactions have been calculated. The IR and NMR spectra of thesynergistic extraction complexes of cadmium (Ⅱ) have been studied as well.

Key words: primary amine neutral organophosphorus reagent synergistic extraction cadmium

Received: 18 January 1989

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1989/V25/I1/104

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