Measurement, correlation of the solubility and solution thermodynamics of 2-cyanoguanidine in (methanol + water) binary solvent systems from T = (283.15 to 343.15) K》.pdfVIP

J. Chem. Thermodynamics 89 (2015) 233–239 Contents lists available at ScienceDirect J. Chem. Thermodynamics journal homepage: www.else /locate/jct Measurement, correlation of the solubility and solution thermodynamics of 2-cyanoguanidine in (methanol + water) binary solvent systems from T = (283.15 to 343.15) K Ning Zhang, Jia Chen, Haipeng Zhao, Wei Shen, Xiaorui Zhang, Yongsheng Ren ⇑ School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, PR China a r t i c l e i n f o a b s t r a c t Article history: The solubility of 2-cyanoguanidine in binary solvent mixtures (water + methanol) were experimentally Received 5 February 2015 measured from T = (283.15 to 343.15) K by the static method. The mass fraction of methanol wt is Received in revised form 15 May 2015 0.100, 0.200, 0.300, 0.400, 0.500, and 0.600. The experimental results show that values obtained increased Accepted 24 May 2015 with temperature increasing from (283.15 to 343.15) K. Good agreement was found between the exper- Available online 30 May 2015 iments and calculations by the modified Apelblat equation, fifth-order polynomial equation and semi-empirical Buchowski–Ksiazczak kh equation. Our experiment values were proven to give best Keywords: agreement with the modified Apelblat equation. The dissolution enthalpy DdisH (24119.2