The resulting crude oil is further refined with the consecutive steps of degumming, neutralization, bleaching, winterization, and deodorization and refined oils directly used or alternatively processed through hydrogenation, fractionation, and interesterification. Corn oil is slightly yellowish, with a mild and characteristic odor and taste.
What is the process of industrialization of corn oil?
The process of industrialization of corn oil, in general, is divided into two main stages: the extraction of crude oil which also yields a corn oil cake coproduct and the subsequent refining of the crude oil.
What is a prepress or dual corn oil extraction process?
Fig. 21.1. Flowchart of the typical prepress or dual corn oil extraction process. If the corn germ has high-oil content, as in the case of the one obtained by wet-milling, the operation will require the use of pressure and heat to disrupt cell walls and break the oil containing spherosomes.
How is corn oil extracted?
For extraction of corn oil, compressed carbon dioxide is fed in a SFE reactor, which contains the flaked germ, with temperature close to 50°C and pressure between 351 and 562 kg/cm 2. After depressurizing the system, the oil is collected in a reservoir.