soya powder This method hydrates the soybeans and frees up the shell. The soy beans are then cleaned and chipped into small pieces and the hulls are separated from the broken beans. Next, the soybean sections are heated up and constrained into flakes. Soybean oil is obtained from the flakes using a distillation procedure and lecithin is separated from the oil by the addition of water and centrifugation or steam precipitation.