Question

What is caustic soda used for aluminium production?

Answer 1

Answer:

A hot caustic soda (NaOH) solution is used to dissolve the aluminium-bearing minerals in the bauxite (gibbsite, böhmite and diaspore) to form a sodium aluminate supersaturated solution or “pregnant liquor”.

Answer 2

1)In detergents and soaps

2)In paper making

3)In bleach manufacturing

4)In bauxite purification