Molecular formula BPO
Molar mass 105.782 g/mol
Density 2.52 g/cm
Except where noted otherwise, data are given for materials in their
standard state (at 25 °C (77 °F), 100 kPa)
Boron phosphate is an inorganic compound with the chemical formula BPO 4. The simplest way of producing it is the reaction of phosphoric acid and boric acid.
Synthesis [ edit ]
Boron phosphate is synthesized from
phosphoric acid and boric acid at a temperature range from 80 °C to 1200 °C. The relatively cold treatment produces a white amorphous powder, which is converted to a microcrystalline product when heated at about 1000 °C for 2 hours. [1 ]
The main reaction of the process is:
3BO 3 + H 3PO 4 → BPO 4 + 3 H 2O
New ways of synthesizing the compound have also been reported, such as
hydrothermal and microwave synthesis. [2 ]
Due to the particular industrial interest of boron phosphate, other methods are used as well:
Structure [ edit ]
If obtained at pressure, the ordinary structure is
isomorphous with the β- cristobalite, while subjecting it to high pressure is obtained a compound isomorphic with α- quartz. [3 ]
Applications [ edit ]
It is used as a catalyst for
dehydration and other reactions in organic synthesis. Also, it serves as a source of phosphates in the exchange reaction in the solid state to obtain metal phosphates. [4 ]
References [ edit ]
^ Mylius, F.; Meusser, A. (1904). "Ueber die Bestimmung der Borsäure als Phosphat". Berichte der deutschen chemischen Gesellschaft 37: 397. doi: 10.1002/cber.19040370171.
^ a b Baykal, A, Kizilyalli, M, Toprak, Muhammet S. & Kniep, R (2001). "Hydrothermal and microwave synthesis of boron phosphate, BPO 4". Turkish Journal of Chemistry 25 (4): 425–432.
^ MacKenzie, J. D.; Roth, W. L.; Wentorf, R. H. (1959). "New high pressure modifications of BPO 4 and BAsO 4". Acta Crystallographica 12: 79. doi: 10.1107/S0365110X5900024X.
^ Moffat, J. B.; Goltz, H. L. (1965). "Surface Chemistry and Catalytic Properties of Boron Phosphate: 1. Surface Area and Acidity". Canadian Journal of Chemistry 43 (6): 1680. doi: 10.1139/v65-222.