Excess Enthalpies of Alkyl Formates + (n‐Alkanes or 1‐Chloroalkanes). Experimental Data and their Analysis in Terms of the UNIFAC Model

Abstract

hE data, obtained at 298.15 K and atmospheric pressure, are presented for the binary systems alkyl formates (propyl and butyl) with n‐alkanes (n‐heptane, n‐octane and n‐nonane) and with 1‐chloroalkanes (1‐chloropentane, 1‐chlorohexane, 1‐chloroheptane and 1‐chlorooctane). The results for hE indicate interactions of alkyl formates which are stronger with aliphatic hydrocarbons than with alkyl chlorides. Experimental results are examined on the basis of the UNIFAC group‐contribution model. In general, the model represents the available experimental hE data with limits of errors smaller than 8%.

Isobaric Vapor−Liquid Equilibrium Data and Excess Properties of Binary Systems Comprised of Alkyl Methanoates + Hexane

“…A literature review shows only few studies of VLE of mixtures of alkyl methanoates + alkanes mixtures. ,,, These binary systems are considered as a preliminary work since they have helped to establish the behavior of methanoates in solution with inert substances such as alkanes as well as providing interesting information about the CH 2 /HCOO interaction. We have published data on the excess enthalpies and volumes at 298.15 K for binary systems composed of (alkyl methanoates + alkanes), ,,− which will also be used in this study. Also, VLE data of the binary system (ethyl methanoate + hexane) were measured at 101.32 kPa and published in a previous paper .…”

“…Moreover, modeling of primary systems (methanoates + alkanes) will help us to define the CH 2 /HCOO interaction, which will improve predictions of other systems that involve the G/HCOO interaction of methanoates with another functional group G. In this sense, this project on methanoates will include extensive experimental information with data of VLE, , and measured at different temperatures. Since data for and at 298.15 K have already been presented in previous works, − we decided to provide experimental data for these excess properties at other temperatures.…”