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The Influence of Various Admixtures on the Calcium Carbonate Precipitation from a Calcium Nitrate and Monoethanolamine Solution

✍ Scribed by Marijan Vučak; Jelena Perić; Marie-Noëlle Pons

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 284 KB
Volume: 21
Category: Article
ISSN: 0930-7516
DOI: 10.1002/(sici)1521-4125(199801)21:1<71::aid-ceat71>3.0.co;2-z

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✦ Synopsis

Calcium carbonate was precipitated by carbonation of calcium nitrate and monoethanolamine solution. The influence of various organic admixtures on the crystallization, crystal morphology, and polymorphism of calcium carbonate has been studied using different techniques. Our results show that sucrose and fructose present even at very high concentrations do not affect the duration or mechanism of the carbonation process at a higher degree, what is attributed to the specific quality of the ethanolamine process. At high concentration citric acid and ethylenediamine-tetrakis-N,N,N,N-(methylenephosphonic acid) had some effect on the process mechanism, phase composition, morphology and crystal aggregation of the calcium carbonate precipitated.

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