Go to  Advanced Search

Hydrolysis of aluminum sulphate solutions at high temperatures

Show full item record

Files in this item

Files Size Format Description   View
UBC_1971_A7 N54.pdf 4.014Mb Adobe Portable Document Format   View/Open
Title: Hydrolysis of aluminum sulphate solutions at high temperatures
Author: Nikolic, Cvetko
Degree Master of Applied Science - MASc
Program Metallurgy
Copyright Date: 1971
Subject Keywords Aluminum sulfate
Abstract: 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.
URI: http://hdl.handle.net/2429/34356
Series/Report no. UBC Retrospective Theses Digitization Project [http://www.library.ubc.ca/archives/retro_theses/]
Scholarly Level: Graduate

This item appears in the following Collection(s)

Show full item record

All items in cIRcle are protected by copyright, with all rights reserved.

UBC Library
1961 East Mall
Vancouver, B.C.
Canada V6T 1Z1
Tel: 604-822-6375
Fax: 604-822-3893