Equilibrium Solubilities of 2-Cyanoguanidine in Water + (Ethane-1,2-diol or N,N-Dimethylformamide) Mixtures at Different Temperatures: An Experimental and Correlational Study
The solid liquid equilibrium of 2-cyanoguanidine in water + (ethane-1,2-diol, MEG, or N,N-dimethylformamide, DMF) mixtures within the temperature range from 278.15 K to 323.15 K at atmospheric pressure by using a static equilibrium method. Its corresponding (solid + liquid) equilibrium data will provide essential support for industrial design and further theoretical studies. The solubility of 2-cyanoguanidine in mixed solvents of (water + MEG) and (water + DMF) increased with increasing temperature, but the rate of solubility is different. The ideal solution, the modified Apelblat equation, and the semiempirical Buchowski Ksiazczak ?h equation were used to correlate with the solubility of 2-cyanoguanidine. The sum of the root-mean-square deviations was less than 2.598*10 3, the relative deviation less than 4.844*10 2 for f1 = 0.025 to 0.186 in (water + MEG) mixed solvents, and the root-mean-square deviations less than 3.412*10 3, the relative deviation less than 4.941*10 2 for f2 = 0.025 to 0.189 in (water + DMF). By comparing the models, the modified Apelblat equation provides a more accurate mathematical representation of the experimental data.
Compounds
#
Formula
Name
1
C2H4N4
N-cyanoguanidine
2
C2H6O2
1,2-ethanediol
3
C3H7NO
dimethylformamide
4
H2O
water
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.