| Abstract: | Investigation of Phase Equilibria in the Systems Sb2O3? SO3? H2O and Bi2O3? SO3? H2O Phase equilibria in the systems Sb2O3? SO3? H2O and Bi2O3? SO3? H2O within the concentration range of 1 up to 98.5% H2SO4 at 100°C are studied. In the system Sb2O3? SO3? H2O crystallization fields of five compounds depending on the H2SO4 concentration were determined: 5Sb2O3 · Sb2(SO4)3 · 3H2O; 7Sb2O3 · 2Sb2(SO4)3; 2Sb2O3 · Sb2(SO4)3; Sb2O3 · Sb2(SO4)3 and Sb2(SO4)3. The obtained compounds are identified by chemical and derivatographic analysis. |
