[atabilgin]

how can I purify to sulfuric acid from H2SO4-HF solution?

[Borek]

You have remove to HF, either chemically (for example precipitating some fluoride salt) or reacting acid mixture with some subtance that reacts only with HF, or based on differences in physical properties (for example volatility).

[atabilgin]

thanks....
I will test it.

[Alberto_Kravina]

Try to use Ca²⁺ if you want to precipitate the Fluoride anions.

[Borek]

CaSO₄

[atabilgin]

I want to escape only HF, I want to pure H2SO4 solution.my solution is to come into being 90% H2SO4 +10% HF . H2SO4 is valuable for me.
thanks your interest

[James Lum]

This would be an easy method for you , Just boil off the HF from the Sulfuric acid / HF mix. this can be acheived in a teflon frying pan or some HF-Proof surface that can withstand high temps. but make sure you do this in a VERY VERY well ventilated area.