Physical Properties of the Alkyl Fluorides and a Comparison of the Alkyl Fluorides with the Other Alkyl Halides and with the Alkyls of the Elements of Period II.

Abstract

Only meager knowledge exists concerning alkyl1 fluorides, in contrast to the extensive literature relative to the other halogen alkyls. Until recently the methods of preparation for alkyl fluorides were cumbersome, and larger quantities of them were available only with difficulty. The ease of decomposition of the tertiary and secondary alkyl fluorides, particularly in the presence of impurities, added another determent to their accurate investigation.Our new method of their preparation (23, 24)-namely, the addition of hydrogen fluoride to olefins and the splitting of cyclopropane (or its alkyl derivatives) with hydrogen fluoride-makes them readily available in large quantities. It permitted us to complete their study, which was pioneered by the investigations of Dumas (19), Fremy (21), Moissan (38, 37), Meslans (38,33,34,35,36) and in more recent years by F.

An Equation of State for Fluoroethane (R161)

“…4 Second virial coefficients B versus temperature T diagram in REFPROP [7] and the Peng-Robinson equation [12] are also compared with the equation of state of this study. It's interesting that the Peng-Robinson equation [12] gives the same trend as the data by Grosse et al [10]. The equation of state represents the saturated-liquid densities by Grosse et al [10] within 0.1 %.…”

“…It's interesting that the Peng-Robinson equation [12] gives the same trend as the data by Grosse et al [10]. The equation of state represents the saturated-liquid densities by Grosse et al [10] within 0.1 %. Figure 3 shows comparisons of densities ρ calculated with the equation of state to the experimental data and values calculated from REFPROP [7] and the Peng-Robinson equation [12].…”

“…As shown in Fig. 2, most of the deviations of the data are within 0.5 % above 200 K. The data of Grosse et al [10], Beyerlein et al [2], and Kul et al [11] show the opposite trend at low temperature. Values calculated from the preliminary unpublished equation T, K Bignell and Dunlop (1993) [27] This Work REFPROP [7] Peng-Robinson equation [12] Fig.…”

“…Because data of the triple point have not been found in the published literature, we use the melting point (130 K) of the fluid as the lower limit of the equation of state [10]. The equation of state is valid from 130 K to 450 K, with pressures up to 5 MPa.…”

Experimental densities, vapor pressures, and critical point, and a fundamental equation of state for dimethyl ether

“…With the new measurements presented here, compressed liquid densities are now available down to 273 K and up to 523 K. Below 273 K, only saturated liquid densities are available to evaluate density deviations of the equation of state for DME. These include the data of Calado et al [21], Grosse et al [40], Maass and Boomer [20], and Wu et al [19].…”