A method for enzymatically preparing diglycerides
A technology for the preparation of diacylglycerol and enzymatic method, which is applied in the field of oil processing, can solve the problems of increasing risks, achieve the effects of reducing energy consumption, good economic benefits and industrial application prospects, and saving production and maintenance costs
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Embodiment 1
[0030] Weigh 100g of a mixture of soybean oil and absolute ethanol and place it in a 500mL round bottom flask (the molar ratio of soybean oil to absolute ethanol is 1:60), stir to mix evenly, heat to 25°C and connect to a reflux device. Add 3g of Novozym 435 therein again, and after 120min of reaction, recover the immobilized lipase, and remove absolute ethanol on a rotary evaporator. Using the above reaction product as the substrate, add absolute ethanol (the molar ratio of monoglyceride to absolute ethanol is 1:1.5), stir to mix evenly, heat to 30°C and connect the reflux device; then add 400U / g immobilized MGLP II, after 0.5h of reaction, recover the immobilized lipase, and remove absolute ethanol on a rotary evaporator. Finally, molecular distillation (evaporating surface temperature is 120°C) was used to separate and purify DAG. The content of DAG in the product was determined to be 58.63%, and lipids such as fatty acid ethyl ester, glycidyl ester, chloropropanol ester a...
Embodiment 2
[0032] Weigh 100g of the mixture of soybean oil and absolute ethanol and place it in a 500mL round-bottomed flask (the molar ratio of soybean oil to absolute ethanol is 1:40), stir to mix evenly, heat to 30°C and connect the reflux device. Then add 6g of Lipozyme 435 therein, and after 60 minutes of reaction, recover the immobilized lipase, and remove absolute ethanol on a rotary evaporator. Using the above reaction product as the substrate, add absolute ethanol (the molar ratio of monoglyceride to absolute ethanol is 1:1), stir to mix evenly, heat to 40°C and connect the reflux device; then add 100U / g immobilized MGLP II, after 2 hours of reaction, recover the immobilized lipase, and remove absolute ethanol on a rotary evaporator. Finally, molecular distillation (evaporating surface temperature is 110°C) was used to separate and purify DAG. The content of DAG in the product was determined to be 51.24%, and lipids such as fatty acid ethyl ester, glycidyl ester, chloropropanol...
Embodiment 3
[0034] Weigh 100g of the mixture of seaweed oil and absolute ethanol and place it in a 500mL round bottom flask (the molar ratio of soybean oil to absolute ethanol is 1:100), stir to mix evenly, heat to 40°C and connect the reflux device. Then add 10g of Novozym 435 therein, and after 15 minutes of reaction, recover the immobilized lipase, and remove absolute ethanol on a rotary evaporator. Using the above reaction product as the substrate, add absolute ethanol (the molar ratio of monoglyceride to absolute ethanol is 1:3), stir to mix evenly, heat to 50°C and connect the reflux device; then add 200U / g immobilized MGLP II, after 1 hour of reaction, recover the immobilized lipase, and remove absolute ethanol on a rotary evaporator. Finally, molecular distillation (evaporating surface temperature is 120°C) was used to separate and purify DAG. The content of DAG in the product was determined to be 54.39%, and lipids such as fatty acid ethyl ester, glycidyl ester, chloropropanol e...
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