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| Extraction of phospholipids concentrate from sesame oil sediment |
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| KeyWord:sesame oil sediment phospholipids concentrate n-hexane extraction hydration concentration flocculation separation |
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| Abstract: |
| The crude sesame oil produced by aqueous extraction or pressing was placed，and the deposit (sesame oil sediment) was used as raw material，and phospholipids concentrate was extracted by impurity removal with n-hexane，hydration concentration and flocculation separation. The optimal extraction processes of hydration concentration and flocculation separation were researched. The results showed that the content of insoluble solid impurities decreased from 21.25% to 0.04% by impurity removal with n-hexane under the conditions of ratio of n-hexane to sesame oil sediment 8∶]1，time 6 h and temperature 25℃. The optimal conditions of hydration concentration were as follows：hydration temperature 85℃，mass ratio of water to sesame oil sediment after impurity removal 4.5∶1，hydration time 40 min；under these conditions，the content of acetone insoluble matter increased from 3.41% to 45.87%. The optimal conditions of flocculation separation were as follows：preheating temperature 40℃，reaction temperature 90℃，sodium chloride dosage 3%，reaction time 20 min；under these conditions，the acetone insoluble matter content of phospholipid concentrate obtained was 56.82%. |
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