hardik22 - 12-4-2018 at 01:22
Hello
The effluent brine has an average PH of about 3 and contains 220 ppm bromine. I would like to extract this bromine from the effluent before
neutralization. I can process this brine to increase Br content in the mother liquor to about 40 g/lit.
How to recover bromine??
Boffis - 12-4-2018 at 03:14
Effluent brine from what? There are already processes for extracting bromine from potash extraction residues, oilfield brines and solar evaporation
ponds, check out the literature, particularly the older books and patents.
SWIM - 12-4-2018 at 09:27
I believe Bittern is being referred to here: The mother liquor left over after the crystallization of salt from sea water.
I have read that bittern is (or at least was when my college chem textbook was written) a source of industrial bromine in some areas.
The mother liquor was boiled down to some extent and gassed with chlorine.
Don't recall how the bromine was then removed from the water, maybe distillation or solvent extraction...
unionised - 12-4-2018 at 10:49
IIRC the usual trick is to add an oxidant- like chlorine. Blow air through the oxidised material which sweeps out the bromine and then pass that air
into a solution of sodium carbonate which traps the bromine (at a much higher concentration that it was originally).
Recovery from a more concentrated solution can be as simple as adding acid.