[thaqrhys]

Hello everyone,

How can I purify Hydrofluoric Acid 55 % in order to get Anhydrous HF ?

Thanks before.

[agrobert]

Call Honeywell.

[thaqrhys]

Thanks for the advice.

Is there any other way that i could do it on my own ?

I only need it in small amount, say a liter or two.

[thaqrhys]

Call Honeywell.

My position is in Indonesia. I've emailed Honeywell, but still no answer.

Does anyone in here have some experiences in purifying acid ( H2SO4 or HCl or others )?
Maybe I could apply the similar techniques for purifying HF.

[lemonoman]

Question for other people, which might contribute and might not:

Could you electrolyse the water at a potential difference of 0.4 V to turn the water into H2 and O2, while keeping the HF?

Given:

F_2(g) + 2e^- --> 2 F^-_(aq)        E⁰ = +2.87 V
2 H⁺_(aq) + 2e^- --> H_2(g)       E⁰ = 0.00 V

[thaqrhys]

I'm afraid it couldn't be happen.

Since HF is a weak acid, instead water ionizes, we will get H2 and F2. CMIIW

thanks so much anyway for your advice.