Solubility and metastable zone width measurement of 3, 4-bis (3-nitrofurazan-4-yl) furoxan (DNTF) in ethanol+water

doi:10.1016/j.cjche.2016.08.015

摘要/Abstract

摘要： The solubility and supersolubility of 3,4-bis(3-nitrofurazan-4-yl)furoxan (DNTF) in ethanol+water at different operation were determined by laser monitoring system under atmospheric pressure to study the metastable zone width (MSZW). The modified Apelblat equation was adopted to correlate the experimental solubility data, and the correlation result showed perfect consistent with the experimental data. The standard dissolution enthalpy, standard dissolution entropy and Gibbs energy were calculated according to the experimental solubility data. The effect of the cooling rate, stirring rate, temperature and the concentration of ethanol+water on the MSZW was studied. It was found that the MSZW of DNTF increased with the increasing cooling rate, decreasing temperature, decreasing stirring rate and decreasing ratio of water. And the apparent nucleation order of DNTF in ethanol+water was calculated by the relationship between the cooling rate and the MSZW.

关键词: 3,4-Bis (3-nitrofurazan-4-yl) furoxan, Solubility, Metastable zone width, Apparent nucleation order

Abstract: The solubility and supersolubility of 3,4-bis(3-nitrofurazan-4-yl)furoxan (DNTF) in ethanol+water at different operation were determined by laser monitoring system under atmospheric pressure to study the metastable zone width (MSZW). The modified Apelblat equation was adopted to correlate the experimental solubility data, and the correlation result showed perfect consistent with the experimental data. The standard dissolution enthalpy, standard dissolution entropy and Gibbs energy were calculated according to the experimental solubility data. The effect of the cooling rate, stirring rate, temperature and the concentration of ethanol+water on the MSZW was studied. It was found that the MSZW of DNTF increased with the increasing cooling rate, decreasing temperature, decreasing stirring rate and decreasing ratio of water. And the apparent nucleation order of DNTF in ethanol+water was calculated by the relationship between the cooling rate and the MSZW.

Key words: 3,4-Bis (3-nitrofurazan-4-yl) furoxan, Solubility, Metastable zone width, Apparent nucleation order

Lizhen Chen, Liang Song, Guanchao Lan, Jianlong Wang. Solubility and metastable zone width measurement of 3, 4-bis (3-nitrofurazan-4-yl) furoxan (DNTF) in ethanol+water[J]. , 2017, 25(5): 646-651.

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