[chimistegirl]

i want to recover an iron oxide from waste pickling line in steel industry.

this oxide is very acid and i tried to washing it with lime.

but i obtain an iron oxide with purple shade.

can i neutralize the product and have a good quality pigment?
thanks

[chimistegirl]

please do you have any suggestions?

[Arkcon]

I'm sorry no one has helped you yet, but your application is a little more complex than you claim, and a little to uncommon for everyone to jump in.  First off, what we call "iron oxide" is a variety of substances, ferric and ferrous, mixed oxides and hydroxides and even varying crystal forms of the same substance.  http://en.wikipedia.org/wiki/Iron_oxide 

It might help if you knew what you were starting with, and we can try to see what reaction you're getting, and also what reaction, and color, you want.

'Tho I gotta say, I don't know where you get 'urgent' from.  If you urgently need a paint pigment, buy some.  If you urgently need to remediate mine waste, do so according to industry and government environmental standards, even if you don't get paint pigment.  Kudos to you for trying to make something useful out of some waste product, but we'll have to see if this is really practical, or even possible, first.

[chimistegirl]

thanks for your reply.. the oxide is Fe203 and i want to make pigment from this waste product ..