Abstract:
Soya bean oil is obtained from the seeds either by pressing or solvent
extraction method. It is the highest volume vegetable oil produced. The oil content in
the seed is about 20 % on dry basis. The crude Soya bean oil of good quality has a
light amber color, which upon alkali refining is reduced to the light yellow color of
most vegetable seed oils. Soya bean oil produced from green or immature beans may
contain sufficient chlorophyll to have a greenish cast but this is not usually very
evident until after the yellow – red pigments of the oil have been bleached in
hydrogenation. Oil produced from badly damaged beans may have a dark brown
color, which will be very difficult to remove by refining.
