Volume No. 10 Issue No.: 4 Page No.: 612-620 April-June 2016

 

CONSTRUCTION AND COMPARISON OF SOLID LIQUID PHASE DIAGRAMS OF BINARY SAT-SAT AND UNSATUNSAT FATTY ACID MIXTURES COMPRISING TWO OF PALMITIC/STEARIC/OLEIC/LINOLEIC/LINOLENIC ACID

 

Eckert K. A.*, Dasgupta S., SelgeB. andAy P.

BTU Cottbus-Senftenberg, Chair of mineral processing, Siemens-Halske-Ring 8, Cottbus-Senftenberg (GERMANY)

 

Received on : February 10, 2016

 

ABSTRACT

 

In this paper, binary phase diagrams of the five main fatty acids present in edible oil based mixtures are shown. While previously the binary systems of one saturated and one unsaturated acid were investigated, in this work the binary mixtures comprise of palmitic (C16:0) and stearic acid (C18:0) or a binary mixture of oleic (C18:1), linoleic (C18:2) or linolenic acid (C18:3). In order to obtain the phase diagrams with all the solid liquid and solid phasetransitions, the mixtures were analyzed by means of Differential Scanning Calorimetry (DSC). Phase change boundary functions based on thermodynamic models and experimental values were fitted and compared. The phase diagrams obtained show behaviors in good agreement to literature. The paper contributes to the deeper understanding of the essential phase change effects during industrial crystallization processes.

 

Keywords : Binary mixtures, Solid liquid equilibrium, Saturated and unsaturated fatty acids, Phase diagram, DSC

 

 

BACK