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Diammonium phosphate (DAP; IUPAC name diammonium hydrogen phosphate; chemical formula (NH 4) 2 (HPO 4)) is one of a series of water-soluble ammonium phosphate salts that can be produced when ammonia reacts with phosphoric acid. Solid diammonium phosphate shows a dissociation pressure of ammonia as given by the following expression and equation: [2]
The radioactive content of the fertilizers varies considerably and depends both on their concentrations in the parent mineral and on the fertilizer production process. [ 94 ] [ 101 ] Uranium-238 concentrations can range from 7 to 100 pCi/g (picocuries per gram) in phosphate rock [ 102 ] and from 1 to 67 pCi/g in phosphate fertilizers.
The annual demand for phosphate as a fertilizer nutrient in 2014 is projected to be over 44 million tonnes, sold primarily as monoammonium phosphate (MAP) and diammonium phosphate (DAP).
Ammonium dihydrogen phosphate (ADP), also known as monoammonium phosphate (MAP) [5] is a chemical compound with the chemical formula (NH 4)(H 2 PO 4). ADP is a major ingredient of agricultural fertilizers [6] and dry chemical fire extinguishers. It also has significant uses in optics [7] and electronics. [8]
2001 ― The start of production of dicalcium phosphate. 2002 ― Starts production of mono-calcium phosphate. 2002 ― The majority share package was acquired by Swiss company EuroChem. 2004 ― Starts production of monodicalcium phosphate production. 2007 ― AB "Lifosa" implemented the Project "Utilization of local and recovered process heat ...
Over 85% is used in fertiliser production, and only less than 7% in feed phosphate production. Two types of deposits exist: of volcanic and of sedimentary origin. These crude phosphates cannot be used by animals directly, but must be converted into a form which can be digested by the animal.
The Bone Valley is a region of central Florida, encompassing portions of present-day Hardee, Hillsborough, Manatee, and Polk counties, in which phosphate is mined for use in the production of agricultural fertilizer. Florida currently contains the largest known deposits of phosphate in the United States.
Triammonium phosphate can be prepared in the laboratory by treating 85% phosphoric acid with 30% ammonia solution: [citation needed] H 3 PO 4 + 3 NH 3 → (NH 4) 3 PO 4 (NH 4) 3 PO 4 is a colorless, crystalline solid. The solid, which has the odor of ammonia, is readily soluble in water. The salt converts to diammonium hydrogen phosphate (NH 4 ...