Henry's Law Constant Measurements of CCl₂F₂, CHClF₂, CH₂F₂, C₂ClF₅, C₂HF₅, CH₂FCF₃, and CH₃CHF₂ in Methanol, Ethanol, and 2-Propanol

Abstract

Isothermal vapor-liquid equilibria for 21 fluorocarbon + alcohol systems ranging from 283 to 313 K at atmospheric pressure were measured. The solubility of fluorocarbons into alcohols decreases with increase in temperature and is on the order of a thousand times greater than that of water. The solubility of fluorocarbons derived from ethane in methanol increases as the number of hydrogen atoms in a molecule increases. From the experimental data, Henry's law constants of dichlorodifluoromethane (CCl 2 F 2 , CFC12), chlorodifluoromethane (CHClF 2 , HCFC22), difluoromethane (CH 2 F 2 , HFC32), chloropentafluoroethane (C 2 ClF 5 , CFC115), pentafluoroethane (C 2 HF 5 , HFC125), 1,1,1,2-tetrafluoroethane (CH 2 FCF 3 , HFC134a), and 1,1-difluoroethane (CH 3 CHF 2 , HFC152a) in methanol, ethanol, and 2-propanol were obtained. The values were correlated as a function of temperature with the Valentiner equation.

Enthalpy of solvation correlations for organic solutes and gases dissolved in 2-propanol, 2-butanol, 2-methyl-1-propanol and ethanol

“…Enthalpies of solution of several gas molecules [97][98][99][100][101][102][103][104][105][106], anthracene [107], acenaphthene [108,…”

Henry’s law constants and infinite dilution activity coefficients of cis-2-butene, dimethylether, chloroethane, and 1,1-difluoroethane in methanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, isobutanol, tert-butanol, 1-pentanol, 2-pentanol, 3-pentanol, 2-methyl-1-butanol, 3-methyl-1-butanol, and 2-methyl-2-butanol

“…The VLE for (dimethylether + methanol) was measured from T = (273.15 to 453.15) K [11] and from T = (254 to 352) K [12]. HenryÕs law constants of 1,1-difluoroethane in methanol and 2-propanol were measured by means of a flow method [13]. HenryÕs law constants of 1,1-difluoroethane in methanol were also measured but using headspace gas chromatography [14] at T = (318 and 323) K.…”

Effect of NaOH on the solubility of fluorocarbon in alcohol–NaOH systems

“…As already stated, the values of H 0 i were correlated as a function of temperature with the Valentiner equation [4,5]. For example, Fig.…”

“…1. The experimental method is similar to that described by Takenouchi et al [4]. An equilibrium cell (5) in a thermostated water bath (6) was used at constant temperature within ±0.1 K. Pressure was maintained at atmospheric pressure.…”

“…Therefore, it is important to know the solubilities of fluorocarbons in alcohol solutions for the design of a reactor. To meet this requirement, we measured the Henry's law constants of fluorocarbons in alcohols for binary systems at atmospheric pressure [4,5].…”