Wax content measurements in partially frozen paraffinic systems

Waxy solid content and wax composition were measured as a function of tempe rature below the onset crystallization temperatures in several synthetic sy stems made up of a solvent (decane) and a paraffinic heavy fraction. The he avy fraction of the first system studied was made up of a regular series of heavy alkanes ranging from C-18 to C-36. Whereas in other systems, some in termediate paraffins were removed from the series in order to have various <<bimodal>> distributions. Experimental data were used to test the capacity of a local composition model to predict solid phase behaviors of these bim odal paraffinic distributions. (C) 1999 Elsevier Science B.V. All rights re served.