| With crude Malania oleifera oil as material,the effects of amount of phosphoric acid, amount of water, degumming temperature and degumming time on degumming rate in hydration degumming process were studied by single factor experiment,and the process was optimized by orthogonal experiment. The effects of amount of excess alkali, alkali mass fraction and deacidification temperature on deacidification rate in alkali deacidification process were studied by single factor experiment,and the process was optimized by response surface methodology. The results showed that the degumming rate could reach 9867% with the phospholipid content 0.023 mg/g of degummed oil under the conditions of amount of phosphoric acid 0.4%, amount of water 4%, degumming temperature 30 ℃ and degumming time 50 min. The deacidification rate could reach 96.79% with the acid value 0.34 mgKOH/g of deacidified oil under the conditions of amount of excess alkali 0.2%, alkali mass fraction 10%, deacidification temperature 40 ℃ and deacidification time 30 min. |
