Ternary Mixtures of N-Docosane, N-Tricosane and N-Tetracosane

Influence of the Alkane Molar Distribution on the Physical Properties of Synthetic Waxes

“…The patterns reveal that all the waxes (S σ ) crystallize in the orthorhombic system characterized by the Bragg diffraction peaks (110/111) and (020/021) and by the homologue series of (00 l ) reflections. The studied mixtures thus form solid solutions, isostructural to the ordered intermediate phase (noted β′) previously identified and characterized with binary − or ternary , alloys of linear alkanes. The evaluation of the hkl interplanar distances from the diffractograms allows the crystallographic parameters a and b of the solid solutions to be calculated (Table ).…”

“…Two cases are distinguished according to the shape of the alkane molar distribution . Thus, a single solution with an orthorhombic structure is detected in the case of mixtures for which the distribution is “normal logarithmic”. − On the contrary, mixtures with an exponential decreasing distribution can form several solid solutions with an orthorhombic structure. ,, Whatever is the distribution, these orthorhombic phases (generally noted β′) are isostructural to the intermediate phases previously identified in the binary or ternary molecular alloys. ,, All these solid solutions evolve via several solid−solid transitions by increasing temperature before melting. The high temperature phases are well described in the following references. ,, …”

“…13,17,18 Whatever is the distribution, these orthorhombic phases (generally noted β 0 ) are isostructural to the intermediate phases previously identified in the binary or ternary molecular alloys. 9,11,12 All these solid solutions evolve via several solidsolid transitions by increasing temperature before melting. The high temperature phases are well described in the following references.…”

“…Since the first characterization made by Muller and Saville in 1925, many works have been published on the subject − as structural analyses at various temperatures performed to establish binary- − or ternary-phase diagrams. , Such representations allow much information on the binary and ternary mixtures to be deduced. More recently, studies relative to normal alkane mixtures were performed.…”

Phase Equilibria in the Ternary System Hexacosane + Dibenzofuran + Biphenyl: Experimental Data and Prediction with DISQUAC Model

“…It is known that long-chain alkanes play a crucial role in paraffin waxes deposition from crude oil. − Experimental data on phase equilibria related to these compounds are important, both to understand the crystallization mechanisms and the development of thermodynamic models . Several works on solubility of long-chain alkanes in aromatics concern mainly binary systems. − Yet, to our knowledge, the study of their ternary systems is limited. − …”