Uses and application scenarios of phosphoric acid
Uses and application scenarios of phosphoric acid,
Phosphoric acid, phosphoric acid manufacturer, phosphoric acid manufacturer recommendation, phosphoric acid model, Phosphoric Acid Supplier, phosphoric acid use and function,
Physicochemical properties:
1. Colorless transparent liquid,No irritant smell
2.Melting point 42℃; boiling point 261℃.
3.Miscible with water in any ratio
Storge:
1. Store in a cool, ventilated warehouse.
2. Keep away from fire and heat sources.
3. The package is sealed.
4. It should be stored separately from easily (combustible) combustibles, alkalis, and active metal powders, and avoid mixed storage.
5. The storage area should be equipped with suitable materials to contain the leakage.
Phosphoric acid for Industrial use
Quality specification(GB/T 2091-2008)
| Analysis items |
specification |
|||||
|
85% Phosphoric acid |
75% Phosphoric acid |
|||||
|
Super Grade |
First Grade |
Normal Grade |
Super Grade |
First Grade |
Normal Grade |
|
| Color/Hazen ≤ |
20 |
30 |
40 |
30 |
30 |
40 |
| Phosphoric acid（H3PO4）,w/% ≥ |
86.0 |
85.0 |
85.0 |
75.0 |
75.0 |
75.0 |
| Chloride(C1）,w/% ≤ |
0.0005 |
0.0005 |
0.0005 |
0.0005 |
0.0005 |
0.0005 |
| Sulfate(SO4），w/% ≤ |
0.003 |
0.005 |
0.01 |
0.003 |
0.005 |
0.01 |
| Iron(Fe),W/% ≤ |
0.002 |
0.002 |
0.005 |
0.002 |
0.002 |
0.005 |
| Arsenic(As),w/% ≤ |
0.0001 |
0.003 |
0.01 |
0.0001 |
0.005 |
0.01 |
| Heavy metal(Pb)，w/% ≤ |
0.001 |
0.003 |
0.005 |
0.001 |
0.001 |
0.005 |
Food additives Phosphoric acid
Quality specification(GB/T 1886.15-2015)
|
Item |
specification |
| Phosphoric acid(H3PO4), w/% |
75.0~86.0 |
| Fluoride(as F)/(mg/kg) ≤ |
10 |
| Easy oxide(as H3PO3),w/% ≤ |
0.012 |
| Arsenic( As)/( mg/ kg) ≤ |
0.5 |
| Heavy metal(as Pb) /( mg/kg) ≤ |
5 |
Use:
Agriculture use:raw material of phosphate fertilizerand feed nutrients
Industry use: chemical raw materials
1.Protect the metal from corrosion
2.Mixed with nitric acid as chemical polishing agentto improve the surface finish of metal
3.Material of phosphatide which is used for producewashing product and insecticide
4.The production of phosphorus containing flameretardant materials.
Food additives use:acidic flavoring,Yeast Nutri-ents, ,such as coca-cola.
Medical use:to produce medicine containing phos-phorus,such as Na 2 Glycerophosphat
Phosphoric acid or orthophosphoric acid, chemical formula H3PO4, molecular weight 97.9724, is a common inorganic acid, is a medium strong acid. It is obtained by dissolving phosphorus tetroxide in hot water. Orthophosphoric acid is obtained commercially by treating apatite with sulfuric acid. Phosphoric acid dehydrates easily in air. Heat loses water to pyrophosphoric acid, and further loses water to metaphosphate. Phosphoric acid is mainly used in pharmaceutical, food, fertilizer and other industries, and can also be used as a chemical reagent.
Material structure
Orthophosphate is a phosphoric acid composed of a single phospho-oxygen tetrahedron. In the phosphoric acid molecule, the P atom is sp3 hybridized, three hybrid orbitals form three sigma bonds with the oxygen atom, and the other P — O bond is made up of one sigma bond from phosphorus to oxygen and two d-pπ bonds from oxygen to phosphorus. A sigma bond is formed by the coordination of a lone pair of electrons from a phosphorus atom to a vacant orbital of an oxygen atom. d←p bond is formed by overlapping the py and pz of oxygen atoms with the dxz and dyz vacant orbitals of phosphorus atoms. Since the 3d energy of phosphorus atoms is much higher than the 2p energy of oxygen atoms, the molecular orbitals are not very efficient, so the P-O bonds are triple bonds in terms of number, but intermediate between single and double bonds in terms of bond energy and bond length. The presence of hydrogen bonds in both pure H3PO4 and its crystalline hydrates may account for the viscosity of the phosphoric acid solution.
Application field
Agriculture: Phosphoric acid is a raw material for the production of important phosphate fertilizers (calcium superphosphate, potassium dihydrogen phosphate, etc.), and also for the production of feed nutrients (calcium dihydrogen phosphate).
Industry: Phosphoric acid is an important chemical raw material. Its main functions are as follows:
Treat the metal surface to create an insoluble phosphate film on the metal surface to protect the metal from corrosion.
Used as a chemical polish mixed with nitric acid to improve the finish of metal surfaces.
The production of detergent, pesticide raw material phosphate ester.
Raw materials for the production of phosphorous flame retardants.
Food: Phosphoric acid is one of the food additives, in food as a sour flavor agent, yeast nutrition agent, Coca-Cola contains phosphoric acid. Phosphates are also important food additives and can be used as nutrient enhancers.
Medicine: Phosphoric acid can be used to make phosphorous drugs, such as sodium glycerophosphate.
