Propane-decane system

In this paper we use dynamic light scattering (DLS) methods to examine micelle size and clustering in (1) supercritical xenon, (2) near-critical and supercritical ethane, (3) near-critical propane as well as (4) the larger liquid alkanes. Reverse micelle or microemulsion phases formed in a continuous phase of nonatomic molecules (xenon) are particularly significant from a fundamental viewpoint since both theoretical and certain spectroscopic studies of such systems should be more readily tractable. Diffusion coefficients obtained by DLS for AOT microemulsions for alkanes from ethane up to decane are presented and discussed. It is shown that micelle phases exist in equilibrium with an aqueous-rich liquid phase, and that the apparent hydrodynamic size, in such systems is highly pressure dependent. 

Typical VLE results for different C02-alkane systems are shown in Figures 5.93 and 5.94. While in Figure 5.93 only VLE data for four different C02-alkane (propane, butane, hexane, decane) are shown, for the system ethane -CO2 additionally the experimental and predicted azeotropic and critical data are shown. As can be seen, excellent results are obtained for all systems considered. This means that the group contribution concept can also be applied for the gases included in the PSRK matrix. 

The reaction of propane-1,3-diamine with phthalic anhydride gives the pyrimidoisoindolone (415), some of whose reactions were investigated Syntheses of the l,8-diazaspiro[4,5]decane (416) and l-oxa-8-azaspiro-decane (417) systems have been reported. ... 

Fig. 3. Temperature dependence of predicted hj by means of Eq. (35). Solid line system methane/ propane. Short dashed line system methane/n-hexane. Long dashed line system methane/ n-decane. In abscissa, T, is the reduced temperature of the heavy n-alkane (respectively propane, n-hexane, n-decane).

When significant differences in the size and type of the molecules exist, however, typically in methane-containing systems, interaction coefficients are needed for accurate results (Chao and Lin, 1986 Czerwienski et al, 1988). The last authors, for example, report that best results for the binary systems methane with propane, cyclohexane and n-decane, are obtained using interaction coefficients of 0.020,0.022,0.032 respectively intheSRKEoS. 

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