Molecular Formula | Fe2O7P2 |
Molar Mass | 285.633322 |
Physical and Chemical Properties | Chemical Properties White amorphous precipitate, which contains excess sodium pyrophosphate. It is easy to oxidize in the air and turns into brown by green. Its aqueous solution is commonly used. Light green to dark gray green milky liquid. No smell. Slightly smelled of iron. |
Use | Use as a nutritional supplement (iron fortifier) in the food industry. For fortified milk powder, baby food and other general foods. |
ferrous sulfate method adds food grade ferrous sulfate crystals to a reactor filled with distilled water for dissolution, slowly adds edible sodium pyrophosphate solution under stirring, and heats to above 90 ℃ for reaction for 30 min. After the reaction is over, the colloidal solution is centrifuged (3000 r/min) for 10 min, the supernatant is removed, the precipitate is obtained, stirred with human distilled water, centrifuged for 10 min, and the precipitate is washed. After removing the supernatant, add distilled water, and separate by stirring, washing and centrifugation. Collect the precipitate, add distilled water, and fully mix and stir with a mixer to prepare edible ferrous pyrophosphate solution. Sealed preservation. Its
2FeSO4 Na4P2O7→Fe2P2O7 2Na2SO4
The ferrous chloride method adds the refined ferrous chloride solution that has removed arsenic and heavy metals to the reactor, slowly adds the edible sodium pyrophosphate solution under stirring, and heats to react to generate a reaction solution, which is filtered to remove sodium chloride, The colloidal solution is centrifuged to remove the supernatant, and the precipitate is added to distilled water for stirring, and then centrifuged to separate and wash the precipitate. After removing the supernatant, add distilled water, stir, wash, and centrifuge. Collect the precipitate, add distilled water, and fully mix and stir with a mixer to prepare edible ferrous pyrophosphate solution. Sealed preservation. Its
2FeCl2 Na4P2O7→Fe2P2O7 4NaCl