Study of the Conversion of CaSO4 to CaCO3 within the CaSO4 + Na2CO3 = CaCO3 + Na2SO4 Four-Component Water-Salt System
D. TrendafelovInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaChristomir ChristovInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaChristo BalarewInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaAneta KarapetkovaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
1995en
ABI
Аннотация
The Pitzer ion-interaction model was employed to predict the conversion in the title quaternary water-salt system. The thermodynamic solubility products (K s 0 ) were determined and the conversion of CaSO 4 to CaCO 3 in the CaSO 4 + Na 2 CO 3 = CaCO 3 + Na 2 SO 4 system was predicted. The standard molar Gibbs free energy ∆ r G 0 of the conversion reaction was calculated to be -23.62 kJ mol -1 . A 98% degree of conversion of CaSO 4 was achieved by using calcium sulfate isolated from sea salt production waste brines. Suitable conditions were found for obtaining CaCO 3 exhibiting a high dispersity and whiteness.
Ҳали таржима қилинмаган
Идентификаторлар
Иқтибослар ва манбалар
2 та иқтибос0 та фойдаланилган манба