ABSTRACT

In this paper, the solid-liquid equilibrium of 2,5-thiophenedicarboxylic acid in methanol, ethanol, i-propanol, n-butanol, acetic acid, n-hexane, acetonitrile and acetone was explored from 278.15K to 333.15K under atmosphere pressure. Modified Apelblat equation and [lamda]h equation were adopted to describe and predict the change tendency of solubility. Besides, the thermodynamic properties of the dissolution process, including enthalpy, entropy and Gibbs energy, were calculated by means of van t Hoff analysis and Gibbs equation. Based on the analysis above, ethanol is considered to be the best solvent in crystallization process of 2,5-thiophenedicarboxylic acid.

Compounds

#	Formula	Name
1	C6H4O4S	2,5-thiophenedicarboxylic acid
2	CH4O	methanol
3	C2H6O	ethanol
4	C3H8O	propan-2-ol
5	C4H10O	butan-1-ol
6	C2H4O2	acetic acid
7	C6H14	hexane
8	C2H3N	acetonitrile
9	C3H6O	acetone

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.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	2 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Gravimetric method	12
POMD	3 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Gravimetric method	12
POMD	4 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Gravimetric method	12
POMD	5 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Gravimetric method	12
POMD	6 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Gravimetric method	11
POMD	7 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Gravimetric method	12
POMD	8 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Gravimetric method	12
POMD	9 1	Mole fraction - 1 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Gravimetric method	11

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Solid-liquid equilibrium and thermodynamic of 2,5-thiophenedicarboxylic acid in different organic solvents

Zhi, W.[Wenbiao], Hu, Y.[Yonghong], Liang, M.[Mengmeng], Liu, Y.[Yan], Li, J.[Jiaojiao], Yin, J.[Jingjing], Shi, Y.[Ying]

ABSTRACT