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American Chemical Science Journal, ISSN: 2249-0205,Vol.: 16, Issue.: 4


Conversion of Calcium Nitrate Solution Obtained from Kyzylkum Phosphorite with Ammonium Carbonate


A. J. Allamuratova1*, A. U. Erkaev1 and A. M. Reymov2

1Tashkent Chemical Technological Institute, Tashkent, Uzbekistan.

2Institute of General and Inorganic Chemistry of the Academy of Sciences of Uzbekistan, Tashkent, Uzbekistan.

Article Information
(1) Nagatoshi Nishiwaki, Kochi University of Technology, Japan.
(1) Anonymous, Pusan National University, Busan, South Korea.
(2) Hidetaka Kawakita, Saga University, Japan.
Complete Peer review History: http://www.sciencedomain.org/review-history/16149


The effect of the concentration of the amount of ammonium and calcium nitrate, the ratio of ammonia and nitrate nitrogen in the solution on the process of conversion of calcium nitrate formed during the processing of low-grade phosphorite with nitric acid has been studied. It has been shown that increasing the ratio of ammonia nitrogen to nitrate and concentrations of amount salt in the initial solution of ammonium and calcium nitrate promotes the process of conversion of calcium nitrate into calcium carbonate and ammonium nitrate.

It has been studied that the effect of various process parameters on the process of filtration and sedimentation of calcium carbonate’s sediments. Under optimum conditions, the filtration rate of the resulting calcium carbonate is 2-3 t/(m2 h) in wet cake.

Keywords :

Calcium and ammonium nitrate’s solution; ammonium carbonate; conversion; filtration; sedimentation of calcium carbonate.

Full Article - PDF    Page 1-6

DOI : 10.9734/ACSJ/2016/28146

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