Then, the soybeans are cleaned and cracked into small pieces. The cracked beans are separated from the hulls and are heated and pressed into flakes.
Next, the flakes undergo a distillation process where the soybean oil is extracted, after which crude soy oil is made to undergo a “degumming” procedure. The sludge that is produced as a result is where soy lecithin comes from. Of course, the sludge would have to undergo another process first, to extract the lecithin.
The waste product usually contains solvents and pesticides that could be harmful if not purified through a process called the hexane extraction. This process actually yields less soy lecithin than the older ethanol benzol process. However, the process also produces a more marketable lecithin with better color, reduced odor and less bitter flavor.
