Normal and acid aluminum sulphate solutions containing about
6.0 gr/1 of aluminum and up to 50 gr/1 SO₄⁼ were hydrolyzed until
equilibrium was reached in the temperature region 125-250°C. Under
the equilibrium conditions the only stable solid phase observed in
equilibrium with a liquid phase of various compositions was
basic aluminum sulphate with nominal formula 3A1₂0₃..4S0₃.9H₂O. A
small portion of the ternary diagrams for the system A1₂O₃-SO₃-H₂O
at 225°C and 250°C was constructed. A mixture of aluminum sulphate
and other metal sulphates, K₂S0₄, Na₂S0₄, Li₂SO₄, FeSO₄ and CuSO₄
i.e. was hydrolyzed at 225°C in order to find the effect of these salts on hydrolysis.
The overall hydrolysis reaction was found to occur according to the chemical equation:
6A1⁺⁺⁺+ 4HS0₄⁻ + 14H₂O ⃗ 3Al₂0₃.4S0₃.9H₂0 + 14H⁺
The equilibrium constants at 125, 150, 175, 200, 225 and 250°C were determined.
Finally a mechanism for the hydrolysis of aluminum sulphate was proposed. / Applied Science, Faculty of / Materials Engineering, Department of / Graduate
| Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/34356 |
| Date | January 1971 |
| Creators | Nikolic, Cvetko |
| Publisher | University of British Columbia |
| Source Sets | University of British Columbia |
| Language | English |
| Detected Language | English |
| Type | Text, Thesis/Dissertation |
| Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
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