Utilization of Rice Bran Oil. VI.

Molecular Distillation of Rice Bran Oil

Abstract

Rice bran oils having ranged acid values were molecular-distilled to analyze their properties, difficulties on distillation and applicabilities on processing.
Mono- or diester contents and their differences, estimated from the hydroxyl values of each fraction, were small for each samples of various acid values.
Bottom residue from the sample oil of high acid value contained more quantity of unsaponifiable matter of high melting point than that from the samples of middle or low acid value. Appearance of the bottom oil was not good, being unsuitable as the raw material of edible oil.
The unsaponifiable matter content in the bottom was less than original sample of low and middle acid value, but in case of high acid value the u.s.m. content was more than that of original.
There is a limit in acid value of crude rice bran oil to be refined by distillation or solvent extraction, where by high acid value oil is not suitable.