Products produced from distillers corn oil include once refined corn oil product, food grade corn oil product, and free fatty acid product which may be used in a variety of applications. The products have varying specifications for free fatty acid content and moisture content. The applications include food, feed, additives, and manufacture of industrial products.

The present invention relates to processes for extracting lipid from vegetative plant parts such as leaves, stems, roots and tubers, and for producing industrial products such as hydrocarbon products from the lipids. Preferred industrial products include alkyl esters which may be blended with petroleum based fuels.

A method for reducing mineral oil content in edible vegetable oil includes the following steps: carrying out the molecular distillation on the edible vegetable oil having mineral oil exceedance; mixing water, the vegetable oil and an emulsifier with stirring to form an unstable emulsion; standing the emulsion for 1 to 5 hours for layer separation to form oil phase and emulsified phase, or oil phase, emulsified phase and water phase, and then separating different phases; freezing the oil phase after stirring, and then treating the oil phase with high-voltage pulsed electric field followed by ultrafiltration to obtain a vegetable oil I; subjecting the emulsion phase to low-temperature plasma treatment and then to high-voltage pulsed electric field treatment to break emulsion, drawing the upper oil phase for ultrafiltration followed by molecular distillation to obtain a vegetable oil II.