How can we separate TeO2 from SiO2?

[little doctor]

How we can separate TeO2 from SiO2 ?

 

[chemisttree]

The specific gravity of TeO2 is 5.9. Alpha quartz is the densest form of silica and has a SG of 2.648.

Try using bromoform (SG 2.88). Silica will float and TeO2 will sink.

 

[little doctor]

The specific gravity of TeO2 is 5.9. Alpha quartz is the densest form of silica and has a SG of 2.648.

Try using bromoform (SG 2.88). Silica will float and TeO2 will sink.

what about using HCl

TeO2 dissolves in HCl

but SiO2 not

?

 

[chemisttree]

If you want to make TeCl4, try HCL.