Phosphate radical

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Phosphate is a kind of Acid radical ion , chemical formula PO four 3- ， Valence -3. Mainly used as fertilizer baking powder And Phosphate rock Made at high temperature with coke and quartz White phosphorus Etc.

Chinese name: Phosphate radical
Foreign name: phosphate radical

chemical formula: PO four 3-
molecular weight: ninety-five
Valence: -3

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phosphoric acid Of salt 。 All are solid, Solubility Press Orthosalt 、 Monohydrogen salt 、 Dihydrosalts gradually increase in turn. Its sodium or sylvite The dihydrogen salt is slightly acidic, the monohydrogen salt is slightly alkaline, and the normal salt is alkaline. The normal salt can be converted into phosphoric acid, dihydrogen salt or monohydrogen salt depending on the amount of acid; Monohydrogen salt and acid can also be converted into phosphoric acid or dihydrogen salt; Dihydrosalts and strong acid Phosphoric acid is generated.

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phosphoric acid Processed phosphate 。 Phosphoric acid and sufficient alkali formation Orthosalt 。 Phosphoric acid and alkali OH - Corporeal Volume ratio When it is 1:2, monohydrogen salt is generated; When it is 1:1, dihydrogen salt is generated. The normal salt of phosphoric acid reacts with acid to produce different phosphorus compounds, and the main representatives are Ca three (PO four ) two 。 If it reacts with sulfuric acid, Ca (H two PO four ) two , which is used to produce high-efficiency phosphate fertilizer Double superphosphate Of Main reaction 。 Ca three (PO four ) two And H two SO four The relationship between the amount of reaction (let na be H two SO four Of Amount of substance , nb is Ca three (PO four ) two The amount of substance) is: na/nb ≤ 2 to generate Ca HPO 4. Na/nb<2 to generate CaHPO four And Ca (H two PO four ) two The mixture, na/nb=2, generates Ca (H two PO four ) two , na/nb<3 to generate Ca (H two PO four ) two And H three PO four , na/nb ≥ 3 to generate H three PO four 。 Another of the above reactions Product Both are CaSO four 。 Phosphate is mainly used as fertilizer, such as calcium superphosphate , heavy superphosphate Phosphate rock powder Such as single phosphate fertilizer and Ammonium phosphate Similar compound phosphate fertilizer and sprayed Potassium dihydrogen phosphate Phosphate like fertilizer; Na three PO four It is commonly used detergent and Boiler scale inhibitor ； Other uses such as dihydrogen salt baking powder And Phosphate rock Made at high temperature with coke and quartz White phosphorus Etc.