Method for preparing glycine iron(óÄ) chelate for fortified food
A ferrous glycinate and chelate technology, which is applied in the preparation of organic compounds, cyanide reaction preparation, chemical instruments and methods, etc., to achieve the effects of easy separation and purification, low cost, and stable physical and chemical properties
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Embodiment 1
[0019] Weigh 0.3 mol of glycine, dissolve it in a three-necked flask with 60 ml of ultrapure water, and heat it in a water bath to a constant temperature of 80°C. After the glycine is completely dissolved, add 0.05mol VC, and at the same time fill with nitrogen to make the solution in the three-necked flask anaerobic. Add 0.15mol ferrous chloride, adjust the pH to 6.0 with 40% sodium hydroxide solution, react for 10 minutes, centrifuge the reaction solution at 8000 rpm for 30 minutes, add 280ml of absolute ethanol to the supernatant to obtain a precipitate, wash with methanol Precipitate several times, place in a closed desiccator to dry for 24 hours, pulverize, and store the product in a sealed sample bag.
[0020] Get 1g product and dissolve in 100ml ultrapure water, the pH value of the system is 6.1, transparent without precipitation, the total iron content is 18.7%, and the ferrous content is 17.2%.
Embodiment 2
[0022] Weigh 0.25 mol of glycine, dissolve it in a three-necked flask added with 50 ml of ultrapure water, and heat it in a water bath to a constant temperature of 50°C. After the glycine is completely dissolved, add 0.01 mol of malic acid and 0.015 mol of reduced iron powder, and fill the solution with nitrogen to make the solution in the three-necked bottle anaerobic. Add 0.1mol ferrous chloride, adjust the pH to 6.5 with 40% sodium hydroxide solution, react for 35 minutes, centrifuge the reaction solution at 8000 rpm for 30 minutes, add 300ml of absolute ethanol to the supernatant to obtain a precipitate, wash with methanol Precipitate several times, place in a closed desiccator to dry for 24 hours, pulverize, and store the product in a sealed sample bag.
[0023] Get 1g product and dissolve in 100ml ultrapure water, the pH value of the system is 6.4, transparent without precipitation, the total iron content is 19.2%, and the ferrous content is 18.0%.
Embodiment 3
[0025] Weigh 0.3 mol of glycine, dissolve it in a three-necked flask with 60 ml of ultrapure water, and heat it in a water bath to a constant temperature of 20°C. After the glycine is completely dissolved, add 0.06 mol of citric acid, and simultaneously fill the solution with nitrogen to make the solution in the three-necked flask anaerobic. Add 0.1mol ferrous chloride, adjust the pH to 6.7 with 40% sodium hydroxide solution, react for 60 minutes, centrifuge the reaction solution at 8000 rpm for 30 minutes, add 500ml of absolute ethanol to the supernatant to obtain a precipitate, wash with methanol Precipitate several times, place in a closed desiccator to dry for 24 hours, pulverize, and store the product in a sealed sample bag.
[0026] Get 1g product and dissolve in 100ml ultrapure water, the pH value of the system is 6.8, transparent without precipitation, the total iron content is 18.9%, and the ferrous content is 16.5%.
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