MODELING OF TRIGLYCERIDE DISTRIBUTION AND YIELD OF ANHYDROUS MILK-FATIN A CONTINUOUS SUPERCRITICAL CARBON-DIOXIDE EXTRACTION SYSTEM

A mathematical model was developed for continuous extraction of multic omponent mixture anhydrous milkfat (AMF) with supercritical carbon dio xide (SC-CO2) as its solvent. At a constant temperature and pressure, the triglyceride mixture was separated into vapor and liquid fractions . The composition distribution (indicated by acyl carbon number), mass distribution and yield of AMF were calculated by the model based on t hermodynamic equilibrium and material balance. The feed composition an d distribution coefficient were required information in this model. Th e experimental values for the extract were in good agreement with the model used. The results for the raffinate were not as precisely modele d. The main factors which affected the model were temperature, pressur e, solvent/feed ratio and extract fraction.