Under
atmospheric pressure, the solubilities of adipic acid, glutaric acid,
and succinic acid in acetic acid + cyclohexanone mixtures were measured
respectively by using the laser dynamic method in which the temperature
ranged from 298.55 to 340.85 K and the mass fraction of cyclohexanone
in the binary solvent mixtures ranged from 0.0 to 1.0. The results
showed that the solubilities of adipic acid, glutaric acid, and succinic
acid in acetic acid + cyclohexanone solvent mixtures all increased
with decreasing of the mass fraction of cyclohexanone in the solvent
mixtures at the constant temperature, and with the gradually increasing
of temperature the measured solubilities of adipic acid, glutaric
acid and succinic acid in acetic acid + cyclohexanone solvent mixtures
would increase at the constant proportion solvent mixtures. The λh equation and the nonrandom two liquid (NRTL) activity
coefficient model were used to correlate the experimental solubilities,
and the average relative deviation was lesser than 2% respectively.
It was found that the solubilities calculated by these models showed
a good agreement with the experimental observations. In addition,
the λh equation with a small number of adjustable
parameters is very suitable for engineers so that they could use directly.
Compared with the λh equation, the NRTL equation
has a wider range of applications due to the stronger theory.
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