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

Abstract

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.

Influence of Selected Saccharides on the Precipitation of Calcium-Vaterite Mixtures by the CO2 Bubbling Method

“…Also, an increase in the concentration of calcite in PCC on the surface of used polyelectrolyte films was observed [28]. However, almost no effect of fructose and sucrose on calcite characteristics was observed when precipitation was carried out in the gas-liquid system by the ethanolamine process [31] or in the gas-slurry system using calcium hydroxide as a substrate [32], but a higher degree of particles agglomeration in both studies was observed.…”