Corn oil containing medium chain fatty acid ester and preparation method thereof
A medium-chain fatty acid ester and medium-chain fatty acid technology, which is applied in the field of corn oil preparation, can solve the problems of easy oxidation, low smoke point of medium-chain fatty acids, unsuitable cooking, etc., to promote rapid metabolism, rectal absorption, and fast The effect of replenishing energy
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Embodiment 1
[0040] a, corn oil enzymatic hydrolysis steps:
[0041] Put the refined corn oil into the reactor I, then add 10% corn oil weight water, then add 20 U / g lipohydrolase (based on corn oil), react for 10 hours at a temperature of 40°C, and hydrolyze The products are long-chain fatty acids, long-chain fatty acid glycerides and glycerol;
[0042] b. Molecular distillation step:
[0043] Molecular distillation is carried out on the hydrolyzate in the reaction kettle Ⅰ through a molecular still. The pressure of the degassing kettle is 0.1kPa, the distillation pressure is 6.0Pa, and the distillation feed rate is 1000g / h to separate long-chain fatty acids and obtain long-chain fatty acid glycerol Mixtures of esters and glycerol;
[0044] c, esterification step:
[0045]Put the mixture obtained in the above steps into the reaction kettle II, use phosphotungstic acid as the catalyst, and the amount of the catalyst is 1% of the mass of the mixture; then add caprylic acid for esterifica...
Embodiment 2
[0050] a, corn oil enzymatic hydrolysis steps:
[0051] Put the refined corn oil into the reaction kettle Ⅰ, then add 15% of the weight of corn oil in water, then add 50 U / g lipohydrolase (based on corn oil), react for 6 hours at a temperature of 60°C, and hydrolyze The products are long-chain fatty acids, long-chain fatty acid glycerides and glycerol;
[0052] b. Molecular distillation step:
[0053] Molecular distillation is carried out on the hydrolyzate in the reaction kettle Ⅰ through a molecular still. The pressure of the degassing kettle is 0.5kPa, the distillation pressure is 7.5Pa, and the distillation feed rate is 1200g / h. Long-chain fatty acids are separated to obtain long-chain fatty acid glycerol Mixtures of esters and glycerol;
[0054] c, esterification step:
[0055] Put the mixture obtained in the above steps into the reaction kettle II, use phosphotungstic acid as the catalyst, the amount of the catalyst is 5% of the mass of the mixture; then add capric ac...
Embodiment 3
[0060] a, corn oil enzymatic hydrolysis steps:
[0061] Put the refined corn oil into the reaction kettle Ⅰ, then add 13% corn oil weight water, then add 30 U / g lipohydrolase (based on corn oil), react at a temperature of 50°C for 8 hours, and hydrolyze The products are long-chain fatty acids, long-chain fatty acid glycerides and glycerol;
[0062] b. Molecular distillation step:
[0063] Molecular distillation is carried out on the hydrolyzate in the reaction kettle Ⅰ through a molecular still. The pressure of the degassing kettle is 0.4kPa, the distillation pressure is 7.07Pa, and the distillation feed rate is 1100g / h. Long-chain fatty acids are separated to obtain long-chain fatty acid glycerol Mixtures of esters and glycerol;
[0064] c, esterification step:
[0065] The mixture obtained in the above steps is sent into the reaction kettle II, using phosphotungstic acid as a catalyst, and the amount of the catalyst is 3% of the mass of the mixture; The ratio is 3.0:1; t...
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