Iron sulfate
Iron sulfate with the chemical formula FeSO4.nH2O is an inorganic compound. In the case of high acidity, it has light blue crystals and in the case of low acidity, it has light green crystals.
This chemical is one of the most widely used iron compounds, and iron displays two different valence states. Divalent iron sulfate or ferrous sulfate is the most common of the two valence states. The trivalent FeSO4.nH2O is called ferric sulfate, with the chemical formula Fe2(SO4)3. .
Heptahydrate ferrous-sulfate has 7 water molecules in its crystalline structure and if it dries and loses water molecules, it turns into the white powder. Ferrous sulfate is used in the treatment of iron deficiency anemia and as a reducing agent in industry.
Iron oxide and SO3 gas is produced by roasting iron sulfate in the furnace.
Production method
This chemical is produced by the reaction between dilute sulfuric acid and iron filings and then the filtration of the solution obtained by the press filter machine. The solution obtained from the press filter is transferred to a polyethylene tank and, after crystallization, is ready for packaging and selling.
Because of increasing the price of iron and iron fillings, the production of iron sulfate from iron fillings is economically unfavorable. So, industrialists and manufacturers prefer to use iron oxide fillings resulting from wire tension. Due to the need for a mild chemical reaction between these substances and sulfuric acid, pH is reduced by injecting additional acid to help dissolve the product as much as possible. The main drawbacks of this method are producing acidic iron and lower iron grade.
It is worth mentioning that the solution pH higher than 3.5, causes the production of unstable iron sulfates, which in exposure to air form iron oxyhydroxide and gradually decompose and results in changing color from green to yellow and brown.
Trivalent production method
If a strong oxidant such as hydrogen peroxide (H2O2) is added to the iron sulfate solution with pH less than 2, trivalent FeSO4.nH2O (or ferric sulfate) with yellow color is formed after crystallization.
To produce anhydrous iron sulfate, crystals can be dried using a rotary dryer. It is also possible to produce a high quality monohydrate FeSO4.nH2O powder by drying the solution in a spray dryer.
FeSO4.nH2O is sold in packages of 25 to 1000 kg.
Uses and applications of iron sulfate
- Used in zinc ingot production
- Used as a fertilizer in agriculture
- Production of macro and micro fertilizers
- Production of iron oxide, Limonite, hematite, and magnetite
- Textile effluent treatment
- Iron carbonate production
- Gold mining and recycling
- As a reducing agent in reactions and chemical industries
- Color stabilizer in textiles
- Ink manufacturing
- Used in the leather industry for producing black leather
- Coloring fibers and wool
- Concrete painting
Hamun Industrial Group, a manufacturer of powdered iron sulfate, with desirable industrial and agricultural quality and with the lowest amount of impurities, is ready to produce, supply and sell iron sulfate required by farmers and industrialists.
- Iron grade : 19%
- Seeding: Seven watercress crystals
- Packaging: 25Kg
