With the development of battery industry and electronic industry, iron phosphate, as the raw material and electronic material product of cathode material for lithium-ion batteries, has a broad market prospect. What equipment is used to produce iron phosphate?
Iron phosphate is also known as iron orthophosphate and high iron phosphate (ferrous phosphate is the bivalent iron ion), with a specific gravity of 2.74. The natural iron phosphate is also called cyanite. The iron in iron phosphate is trivalent iron, with the majority of dihydrate. It is insoluble in other acids except sulfuric acid, and almost insoluble in water, acetic acid and alcohol. It is a white, grayish white monoclinic crystal powder, which is a salt of iron salt solution and sodium phosphate, in which iron is positive trivalent. It has the characteristics of non-toxic, low cost and stable structure. It has a wide range of applications, including catalysts, additives, synthetic raw materials of electrode materials, etc.
The production method of iron phosphate: in the presence of oxidants (hydrogen peroxide, sodium chlorate, etc.), treat the iron salts (such as ferrous nitrate, ferrous sulfate, etc.) that have been removed and heavy metals with purified phosphoric acid, and then add alkali to adjust the Ph value to 2~6, that is, precipitate iron phosphate.
1. Ferrous nitrate method: first, heat the ferrous nitrate solution to 95~110% C to make it completely dissolved, then add the detergent and heavy metal remover to purify the solution in the presence of the chemical agent, filter, remove the impurities of the detergent and heavy metal, add the refined ferrous nitrate solution into the reactor, add the purified purified concentrated phosphoric acid and pure ferric phosphate crystal seeds under stirring, and heat the reaction for 4h under constant stirring to generate the precipitate of ferric phosphate, which is filtered, Wash, dry and prepare edible iron phosphate products.
2. Ferrous sulfate method: first add ferrous sulfate into distilled water and heat it to dissolve it completely. In the presence of oxidant, add detergent and heavy metal remover to purify the solution, filter it, add refined ferrous sulfate solution into the reactor, add purified concentrated phosphoric acid under stirring, then add refined sodium chlorate solution, and react at 85°C for 30min, then slowly add edible caustic soda solution, and adjust the Ph value to 2~6, Precipitate iron phosphate. After filtration, washing and drying, the edible iron phosphate product is prepared.
Battery grade iron phosphate is a kind of high-purity iron phosphate product.