... oil seeds such as cottonseed, rapeseed, high-oil sunflower seed, peanut kernel, soybean, etc. Before prepressing, you have to pretreat oilseed ... of pretreatment, by using shucking machine to remove shell of oil seeds, because shell will reduce the rate of oil yield and ... oil and cake. After prepressing, there are about 18% resid in the cakes, the cakes will be sent to the solvent ...