Research on heteropoly anions with chromatography. VI. the study of decomposition reaction of 12-tungstoborate in solution

Abstract

The decomposition reaction of heteropoly anion a-BW12O405- in solution was studied with micellar liquid chromatog. It was found for the first time that the decomposition reaction of a-BW12O405- possesses two steps, the first is the fast interconversion equilibrium between a-BW12O405- and its isomer and the second is that the isomer dissocs. slowly. By experiment, the influence of the concentration of heteropoly anion, the pH value, the concentration of inorganic salt and the temperature on the decomposition reaction were investigated and the equilibrium equation of the first step of the reaction and the equation of the reaction kinetics of the second were obtained. Finally, the possible mechanism of the decomposition of a-BW12O405- was discussed.

Key words: REACTION MECHANISM, HETEROPOLYACID, REACTION KINETICS, LIQUID CHROMATOGRAPHY, DEGRADATION REACTION

CLC Number:

O658
O612

Cite this article

LI NANQIN;ZHU MINGHUA. Research on heteropoly anions with chromatography. VI. the study of decomposition reaction of 12-tungstoborate in solution[J]. Acta Chimica Sinica, 1994, 52(9): 888-894.

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