The effect and the quality of six degumming processes were studied, and conditions of the intermediate hydrated degumming process were optimized. Results indicated that both the conventional hydrated degumming and the wet degumming technique can meet the standard of degumming, and they not only had little negative effect on the acid value, peroxidation, and iodine value, but had a high oil yield. The optimal condition for intermediate hydro-degumimng was 60 ℃ temperature, water added 30% as ...