Iron(II) casein succinylate and preparation method and application thereof
A technology for succinyl casein and casein, which is applied in the field of medicine, can solve the problems of poor tolerance, gastrointestinal irritation, and reduced bioavailability, and achieves the effects of good product purity, high reaction yield and good properties.
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Embodiment 1
[0038] (a) Preparation of casein succinic acid
[0039] At 25°C, 5g of casein was suspended in 40ml of water, and stirred for 30min. Add 4 mol / l NaOH solution to adjust the pH to 8.5. Take 1g of succinic anhydride and add it into the solution three times (the time interval between each addition is 300s), keep the pH at 8.5, and stir for 20 minutes. Centrifuge and take the supernatant or filtrate. Add 3 mol / l HCl to adjust the pH to 3.8 to precipitate casein succinic acid, separate by centrifugal filtration, and wash the precipitate with water.
[0040] (b) Iron loading reaction
[0041] Then add about 105ml of water, add 4mol / l NaOH solution to adjust the pH value to 8.5 to obtain casein succinic acid solution, under nitrogen protection conditions, take 1.136gFeCl2 Configured as a 12% solution, slowly added to the casein succinic acid solution, stirred for 15 minutes, and the pH was controlled at 6.0~7.0.
[0042] (c) refined
[0043] Add 3 mol / l HCl to adjust the pH to 3...
Embodiment 2
[0047] (a) Preparation of casein succinic acid
[0048] At 25°C, 5g of casein was suspended in 45ml of water, and stirred for 30min. Add 4 mol / l NaOH solution to adjust the pH to 9.0. Take 5g of succinic anhydride and add it into the solution three times (the time interval between each addition is 300s), keep the pH at 9.0, and stir for 20 minutes. Centrifuge and take the supernatant or filtrate. Add 3 mol / l HCl to adjust the pH to 4.6 to precipitate casein succinic acid, separate by centrifugal filtration, and wash the precipitate with water.
[0049] (b) Iron loading reaction
[0050] Then add about 110ml of water, add 4mol / l NaOH solution to adjust the pH value to 9.0 to obtain casein succinic acid solution, under nitrogen protection conditions, take 1.79gFeCl 2 Configured as a 12% solution, slowly added to the casein succinic acid solution, stirred for 15 minutes, and the pH was controlled at 6.0~7.0.
[0051] (c) refined
[0052] Add 3mol / l HCl to adjust the pH to 4...
Embodiment 3
[0056] (a) Preparation of casein succinic acid
[0057] At 30°C, 5g of casein was suspended in 75ml of water, and stirred for 20min. Add 4mol / l NaHCO 3 The pH of the solution was adjusted to 8.0. Take 5g of succinic anhydride, add it into the solution three times (the time interval between each addition is 300s), keep the pH at 8.0, and stir for 20min. Centrifuge and take the supernatant or filtrate. Add 3 mol / l HCl to adjust the pH to 4.6 to precipitate casein succinic acid, separate by centrifugal filtration, and wash the precipitate with water.
[0058] (b) Iron loading reaction
[0059] Then add about 110ml of water, add 4mol / l NaOH solution to adjust the pH value to 8.0 to obtain casein succinic acid solution, under nitrogen protection conditions, take 1.63gFeCl 2 Configured as a 12% solution, slowly added to the casein succinic acid solution, stirred for 15 minutes, and the pH was controlled at 6.0~7.0.
[0060] (c) refined
[0061] Add 3mol / l HCl to adjust the pH...
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