tailieunhanh - A study for synthesis of dicalcium phosphate from various grades of phosphatic materials

Anhydrous dicalcium phosphate with monetite structure plays a significant biological importance for the mineralization of bones and teeth. This compound can reconstruct the hard tissues due to its high solubility in the body than other calcium phosphate compounds. Di calcium phosphate is being used as a food - additive supplying calcium and phosphate for humans and animals. | Journal of Science and Technology 54 (5A) (2016) 1-8 A STUDY FOR SYNTHESIS OF DICALCIUM PHOSPHATE FROM VARIOUS GRADES OF PHOSPHATIC MATERIALS Bui Quoc Huy1, Nguyen Thi Thanh1, Le Thi Nga2, Le Xuan Thanh2 1 Hung Yen University of Technology and Education, Dan Tien, Khoai Chau, Hung Yen 2 Hanoi University of Science and Technology, N 1, Dai Co Viet Str, Hanoi Received: 15 July 2016; Accepted for publication: 5 December 2016 ABSTRACT Anhydrous dicalcium phosphate with monetite structure plays a significant biological importance for the mineralization of bones and teeth. This compound can reconstruct the hard tissues due to its high solubility in the body than other calcium phosphate compounds. Di calcium phosphate is being used as a food - additive supplying calcium and phosphate for humans and animals. Due to the high effective P2O5 content, this compound is also used efficiently as a slowly soluble fertilizer in agriculture for all soil and crop types. This paper presents results of synthesis of di calcium phosphate monetite from Ca(OH)2 and phosphoric acid and di calcium phosphate brushite from the resulting solution after enriching of type II Lao Cai apatite ore by phosphoric acid. The samples were examined by volumetric titration methods, XRD, SEM and EDS. Keywords: synthesis dicalcium phosphate, monetite, brushite. 1. INTRODUCTION Anhydrous dicalcium phosphate CaHPO4 with monetite structure plays an important role for the biomineralization in bones and teeth. Using this material, the hard tissues can be reconstructed more efficiently than other calcium phosphates due to its high solubility in the body thus one can find practical applications of CaHPO4 in dental cements and restorative materials [1 - 3], and in the food additive calcium and phosphate supplements for humans and animals as well [4]. Also due to the high effective P2O5 content, dicalcium phosphate is a slowly soluble form of fertilizer which is often used in agriculture for all types of soil and

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• Synthesis dicalcium phosphate
• Volumetric titration methods
• Di calcium phosphate
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