
TY  - JOUR
A1  - Davey, PT 
T1  - The control of phosphate contamination in an acid alumina process
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1968
VL  - 21
IS  - 6
SP  - 1451
EP  - 1459
KW  - 
UR  - https://doi.org/10.1071/CH9681451 
N2  - In concentrated aluminium sulphate solutions, such as are used in an acid alumina process, phosphate is very powerfully complexed and no satisfactory methods for its removal from solution have been previously described. The procedure herein uses zirconium sulphate to precipitate phosphate from acid solutions containing up to 50 g/l. Al2O3. Faster precipitation is achieved by prior heating of the aluminium solutions to 100º for a short period and a residual liquor containing less than 50 p.p.m. P2O5 is readily obtained. The procedure has been successfully applied to the preparation of specification-grade alumina from an Argentine laterite (0.1 % P2O5) using the CSIRO acid alumina process. 
ER  -

