A kind of preparation method of 1,3-dioleic acid-2-palmitic acid triglyceride
A technology of palmitic acid triglyceride and dioleic acid, applied in 1 field, can solve the problems of high price, OPO dependence on imports, etc., and achieve the effects of low cost, common raw materials, and simple process
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Embodiment 1
[0030] (1) Add 10 g of palm stearin and 10 g of palmitic acid into a three-necked flask, under nitrogen protection, stir and mix at 70 °C, then add 0.02 g of catalyst, and react at 160 °C for 4 hours;
[0031] (2) be cooled to room temperature, filter and reclaim catalyst, obtain light yellow viscous oily liquid A;
[0032] (3) Add 1 g of compound enzyme (containing 0.4 g of Novozyme 435 lipase after cross-linking of dextran diacetaldehyde) into the fixed-bed reactor, and add 20 g of liquid A, 140 g of oleic acid, and 20 g of n-hexane to the bottle with a stopper. Evenly, turn on the peristaltic pump, set the flow rate to 10ml / min, and set the temperature to 45°C for 10h cycle reaction;
[0033] (4) Recover n-hexane and palmitic acid by vacuum distillation, add absolute ethanol, collect the crystalline solid at ≥15°C and ≤20°C, wash with ethanol≤10°C, and dry under reduced pressure to obtain a white solid. The OPO content was 93.6% by HPLC analysis, and the yield was 94%.
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Embodiment 2
[0037] (1) Add 10 g of palm stearin and 10 g of palmitic acid into a three-necked flask, under nitrogen protection, stir and mix at 70 °C, then add 0.02 g of catalyst, and react at 180 °C for 5 hours;
[0038] (2) be cooled to room temperature, filter and reclaim catalyst, obtain light yellow viscous oily liquid A;
[0039] (3) Add 0.2 g of compound enzyme (containing 0.08 g of Novozyme 435 lipase after cross-linking of dextran diacetaldehyde) in the fixed bed reactor, and add 20 g of liquid A, 160 g of oleic acid and 20 g of n-hexane to the stoppered bottle Mix well, turn on the peristaltic pump, set the flow rate to 10ml / min, and set the temperature to 50°C for 12h reaction;
[0040] (4) Recover n-hexane and palmitic acid by vacuum distillation, add absolute ethanol, collect crystalline solid at ≥15°C and ≤20°C, wash with ethanol≤10°C, and dry under reduced pressure to obtain white solid OPO. By HPLC analysis, the OPO content was 96.72%, and the yield was 96.11%.
[0041] ...
Embodiment 3
[0044] (1) Add 10 g of palm stearin and 10 g of palmitic acid into a three-necked flask, under nitrogen protection, stir and mix at 70°C, then add 0.02g of catalyst, and react at 200°C for 6 hours;
[0045] (2) be cooled to room temperature, filter recovery catalyst, obtain light yellow viscous oily liquid A;
[0046] (3) 0.4g of compound enzyme (containing 0.16g of Novozyme435 lipase after cross-linking of dextran diacetaldehyde) was added to the fixed bed reactor, and 20g of liquid A, 180g of oleic acid and 20g of n-hexane were added to the bottle with stopper , Mix 1.4g of composite catalyst, turn on the peristaltic pump, set the flow rate to 10ml / min, and set the temperature to 55℃ for 14h of circulation reaction;
[0047] (4) Recover n-hexane and palmitic acid by vacuum distillation, add absolute ethanol, collect crystalline solid at ≥15°C and ≤20°C, wash with ethanol≤10°C, and dry under reduced pressure to obtain white solid OPO. By HPLC analysis, the OPO content was 96...
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