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- Title
Measurement and correlation of solid-liquid equilibrium data for nitroguanidine in water and organic solvents from 298.15 K to 338.15 K.
- Authors
Li-zhen CHEN; Chong-yang ZHAO; Le ZHANG; Yuan-yuan LIU; Jian-long WANG; Duan-lin CAO
- Abstract
Nitroguanidine(NQ) is a high-energy and low-sensitivity explosive and solid-liquid equilibrium data are significant for study on crystallization of NQ. The solubilities of NQ in water, dimethyl sulfoxide, N, N-dimethylformamide, 1,4-butyrolactone and dimethyl sulfoxide+water, N, N-dimethylformamide+water were measured by dynamic laser monitoring within a temperature range from 298.15 K to 338.15 K. The experimental data were correlated by modified Apelblat equation, λh equation, CNIBS/R-K model, and Jouyban-Acree model. The results show that the four thermodynamic models can all be used to predict solubility with high accuracy. Accrding to the Akaike's information criterion (AIC), the better models for correlating the solubility of NQ are judged. Additionally, the dissolution enthalpy, entropy and Gibbs free energy were calculated by the van't Hoff equation.
- Subjects
SOLID-liquid equilibrium; NITROGUANIDINE; ORGANIC solvents
- Publication
Journal of Measurement Science & Instrumentation, 2018, Vol 9, Issue 3, p226
- ISSN
1674-8042
- Publication type
Article
- DOI
10.3969/j.issn.1674-8042.2018.03.004