Thermodynamic properties of some cyclohexyl esters in the condensed state

Solubility of perfumery and fragrance raw materials based on cyclohexane in 1-octanol under ambient and high pressures up to 900 MPa

“…During the DSC and solubility measurements, the procedure of repeatedly decreasing and increasing temperature usually results in the stable phase. The glass transition temperature in our experiment was at 154 K with DC p equal to 72.7 J AE K À1 AE mol À1 , which is very close to the result published earlier [7]. For 2CEA and 2CE, the thermograph did not show any transition up to a temperature of 153 K. We did not notice any phase transition, not even a glass transition.…”

“…For one pass, the enthalpy of fusion should be the sum of these two effects, about 8 kJ AE mol À1 whilst from our measurements the average was 3.38 kJ AE mol À1 . The obtained melting point of CA was lower than presented earlier [7]. We cannot expect this result as a melting temperature of the CA metastable phase because the result from the SLE visual method was the same.…”

“…For CA, we have obtained only one run (see DSC diagrams, GRS 1 of ESI 1 ) for the melting transition at temperature 221.45 K with the enthalpy of fusion equal to (3.38 ± 0.01) kJ AE mol À1 . On the other hand, the (solid + solid) phase transition of the CA compound, accompanied by the enthalpy change of 5.23 J AE mol À1 at T = 221.8 K, was observed by the melting run as 7.99 kJ AE mol À1 at T = 224.6 K by Kozyro et al [7]. For one pass, the enthalpy of fusion should be the sum of these two effects, about 8 kJ AE mol À1 whilst from our measurements the average was 3.38 kJ AE mol À1 .…”

“…The esters of cyclohexanol and carboxylic acids used as a FM are formed as by products in the process of the commercial oxidation of cyclohexane into cyclohexanone [7]. The first thermodynamic data of ester based on cyclohexanol and carboxylic acids, as isobaric heat capacities, densities, speed of sound, enthalpies of vaporization, and enthalpies of phase transitions have just been presented [7,8].…”

“…The first thermodynamic data of ester based on cyclohexanol and carboxylic acids, as isobaric heat capacities, densities, speed of sound, enthalpies of vaporization, and enthalpies of phase transitions have just been presented [7,8]. Cyclohexyl acetate was also tested as an entrainer for the solvent extraction and separation of butyric acid from water [9].…”