STUDY OF THE CONVERSION OF CASO4 TO CACO3 WITHIN THE CASO4-COMPONENT WATER-SALT SYSTEM(NA2CO3=CACO3+NA2SO4 4)

Authors
TRENDAFELOV D CHRISTOV C BALAREW C KARAPETKOVA A
Citation
D. Trendafelov et al., STUDY OF THE CONVERSION OF CASO4 TO CACO3 WITHIN THE CASO4-COMPONENT WATER-SALT SYSTEM(NA2CO3=CACO3+NA2SO4 4), Collection of Czechoslovak Chemical Communications, 60(12), 1995, pp. 2107-2111
Citations number
18
Categorie Soggetti
Chemistry
Journal title
Collection of Czechoslovak Chemical Communications → ACNP
ISSN journal
00100765
Volume
60
Issue
12
Year of publication
1995
Pages
2107 - 2111
Database
ISI
SICI code
0010-0765(1995)60:12<2107:SOTCOC>2.0.ZU;2-C
Abstract
The Fitter ion-interaction model was employed to predict the conversio n in the title quaternary water-salt system. The thermodynamic solubil ity products (K-s(0)) were determined and the conversion of CaSO4 to C aCO3 in the CaSO4 + Na2CO3 = CaCO3 + Na2SO4 system was predicted. The standard molar Gibbs free energy Delta(r)G(0) of the conversion reacti on was calculated to be -23.62 kJ mol(-1). A 98% degree of conversion of CaSO4 was achieved by using calcium sulfate isolated from sea salt production waste brines. Suitable conditions were found for obtaining CaCO3 exhibiting a high dispersity and whiteness.