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| Optimization of dry fractionation process for enrichment of 1,3-dioleoyl-2-palmitoylglycerol |
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| DOI： |
| KeyWord:1,3-dioleoyl-2-palmitoylglycerol dry fractionation crystallization |
| FundProject:湖北省重大科技创新专项“米糠油精深加工关键技术研发”（2019ABA105） |
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| Abstract: |
| In order to improve the content of 1,3-dioleoyl-2-palmitoylglycerol (OPO), OPO prepared by chemical transesterification combined with enzymatic acid digestion reaction was used as raw material, the effects of dry fractionation conditions (crystallization temperature, cooling rate and crystal raising time) on the content and enhancement rate of OPO, the content and enhancement rate of sn-2 palmitic acid (PA) in total PA and the liquid oil yield of fraction were investigated by single factor experiment and orthogonal experiment. The results showed that the optimal conditions of the dry fractionation were as follows: crystallization temperature 6 ℃, cooling rate 4 ℃/h and crystal raising time 3 h. Under these conditions, the content and enhancement rate of OPO was （38.84±0.39）% and （46.07±1.47）% respectively, the content and enhancement rate of sn-2 PA in total PA was （91.08±0.16）% and（4761±0.25）% respectively, and the liquid oil yield was （31.26±0.34）%. In conclusion, triglyceride with higher purity of OPO can be obtained by dry fractionation. |
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