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February 2019

One of the methods of purification of leach liquor is ion exchange, which involves_________________?

Chemical Engineering Basics /
One of the methods of purification of leach liquor is ion exchange, which involves_________________?

A. Exchange between two liquid phases
B. Exchange between a gaseous phase and a liquid phase
C. Exchange between a liquid phase and an organic resin phase
D. Exchange between a solid phase and a gas phase

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Chemical Engineering Basics

Identify the correct statement with reference to the extractive metallurgy of aluminium ?

Chemical Engineering Basics /
Identify the correct statement with reference to the extractive metallurgy of aluminium ?

A. The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3
B. Approximately 80% of the aluminium deposited on the cathode comes from cryolite
C. Sodium is deposited along with aluminium, but is immediately vaporised
D. Anode effect sets in when the cryolite concentration goes below 40%.

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Chemical Engineering Basics