plante1999 - 7-3-2011 at 19:02
does HF react with acetic any. ?
if yes , wath is the product?
if no, yes i find a suitable solvent for (no-water HF)
in fact i search a solvent for fluorinating with HF material cannot be in water.
thanks!
DDTea - 7-3-2011 at 19:20
Do you mean anhydrous hydrogen fluoride or do you mean hydrofluoric acid?
If it's the latter, I would expect HF to catalyze the decomposition of acetic anhydride to acetic acid. That seems like a waste of perfectly good
acetic anhydride and I don't know why you'd do that.
What kind of reaction are you trying to accomplish? You aren't making it easy to answer by not being specific.
plante1999 - 7-3-2011 at 19:25
i mean anydrous HF and i want to make:
4HF + Ti -> TiF4 + 2H2
and if it have water a complex form.
redox - 11-4-2011 at 17:35
Are you trying to find a solvent that dissolves titanium?! Would simply passing HF over titanium perform your synthesis?
woelen - 12-4-2011 at 00:09
Dissolving titanium is fairly easily done if you have HCl and some fluoride. Take 10% HCl, add a pinch of NaF or KF and then add the titanium metal.
It quickly dissolves, giving a green solution, which on standing in contact with air first becomes brown and finally colorless. The green complex
probably contains titanium in oxidation state +3 and then oxidation by oxygen from the air leads to formation of colorless titanium(IV).
Without the added fluoride, the titanium dissolves with great difficulty. Even in concentrated HCl it only dissolves very slowly.
redox - 25-4-2011 at 14:19
So you are asking if HF is soluble in a solvent that titanium tetrachloride doesn't react with, correct?
Ozone - 25-4-2011 at 14:26
How does Ti relate to acetic anhydride, here? :\ Anyway, we have used ammonium bifluoride to etch and/or dissolve Ti°.
O3
[edit] Ah, you wanted to use acetic anhydride to dry HF (say 48%)? I'm surprised I did not hear the noggin of many-a-member go *thunk* (like the
coconut) as they hit the floor in response to such sacrilege 
[Edited on 25-4-2011 by Ozone]