Crystallization of waxes during sunflower seed oil refining

RIVAROLA, G; AÑON, MARÍA CRISTINA; A. CALVELO

JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY (JAOCS)

SPRINGER

Lugar: Berlin; Año: 1985 vol. 62 p. 1508 - 1513

0003-021X

Cooling conditions and wax content in oil determine the morphologies adopted by crystals. At high cooling rates (K) and low temperatures of the refrigerant (Tf), nucleation temperatures are low. Thisinduces the formation of a great number of small nuclei. However,at low K and high Tf, nucleation temperatures are high, producinga few large nuclei. The wax/oil equilibrium curve was determined ; itallows the evaluation of the wax remaining in the oil after a giventreatment. In addition, experiments were performed to evaluatecrystal separation from oil. The increase of temperature from 10 to25 C and the presence of soaps in the oil facilitate wax separation.These results give additional information that can improve operatingconditions and make the choice of technological alternatives in waxseparation easier.