Removing oil from pickling solution

["Phillip J. Annis" <pannis@facstaff.wisc.edu>]

Hi Everyone

Looking for suggestions with this problem.

Pickling tank 5,600 gallons

18% Nitric acid
38% Hydrofluoric acid
Tank is contaminanted with small amounts of oil.

 Which technology would you suggest to remove the oil from this tank?

Please, Yes, I know the first answer is "Don't introduce the oil to the acid
tank in the first place". We're working on that.

Any suggestions are really appreciated

Jack