... prepressing, leaching(extracting) and refinery. Essential oil equipment have oil press machine, edible oil extraction machine, DTDC, ... and newest tech. 5. Raw material Almost all of the grain seeds can be pressed to make edible oil, like corn, soybean, peanut, sunflower ... , flaxseed, coconut, palm, rice brain, cottonseed, sesame, castorseed and so ...