www.eiribooksandprojectreports.com 1
ENGINEERS INDIA RESEARCH INSTITUTE
4/54, Roop Nagar, Delhi-110007 (India)
Phone: 9289151047, 9811437895, 9811151047
E-mail:
[email protected]
Website: www.eiriindia.org
DI-CALCIUM PHOSPHATE (POWDER)
[EIRI/EDPR/4737] J.C.: 2957XL
Dicalcium phosphate is also known as the calcium hydrogen phosphate dehydrate
or dibasic calcium phosphate with the molecular formula CaHPO4. The ‘di’ prefix
indicates the formation of the HPO42– anion, which involves the removal of two
protons from phosphoric acid (H3PO4). Dicalcium phosphate is mostly used as a
dietary supplement. It is commonly found as a dehydrate; however, it can be
converted into an anhydrous form by applying heat. It is insoluble in water and
biomaterial in nature. Dicalcium phosphate contains a minimum 19% of
phosphorus content and maximum 28% of calcium content; therefore, it is used
as a source of phosphorus and calcium.
Rock phosphates are natural sources of calcium phosphate in the form of
tricalcium phosphate. Acidification of tricalcium phosphate with mineral acids
yields phosphates and phosphoric acids. Acidification of rock salt with
hydrochloric acid produces mono calcium phosphate which remains in solution
which is treated to remove fluorides as precipitates.
The supernatant liquid containing monocalcium phosphate is treated with lime to
obtain dicalcium phosphate and calcium chloride which is considered as a by -
product. Phosphoric acids which are obtained on acidification of natural
phosphates are purified and then neutralized to produce dicalcium phosphate.
Animal-feed grade Di-Calcium Phosphate is made from wet process acid that has
been treated to reduce fluorine content to an acceptable level.
It is intended to prepare a Feasibility Report to install 30000 MT/Year Di-Calcium
Phosphate (Powder) production facilities as a New Project.