What does activated bauxite, activated carbon, activated alumina do to these materials? How is it achieved? Is it by burning or heating up to certain temperature?
On the other hand, what does calcine / calcination means?
Used transformer oil has high total acidity number (TAN) and is dark coppery in colour. Does lowering the TAN gives oil its bright yellow colour? If yes, what actually gives the oil its colour with respect to acidity? If not, what actually happens when the transformer oil is cleaned via media...
I have a bag of Al2O3 from the aluminium smelter. I have heard of activating Al2O3 by burning it. What exactly is happening to Al2O3 chemically when you burn it? And how is it better than when it's not activated? What does "activation" means when you burn Al2O3?
I have a bag of what was told to be Al2O3. However I think it's not 100% and may contain other stuff like Aluminium or maybe sand. It was taken from an aluminium smelter as waste. What experiments can I carry out to find out the % amount of Al2O3 in the bag? And after finding out, if possible...
