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Removal of Barium Sulfate From Recovered Chromic Acid Solution



2002

We use an evaporator to recover chromium from the countercurrent rinses following the chrome plating tank. Barium carbonate is added to the solution to precipitate the sulfates. What is a good way to remove the Barium sulfate from our recovered chromic acid tank?

Holly Hirchert
- Urbana, Illinois, USA


2002

It is only slightly soluble. Most of it will be in the sludge.

James Watts
- Navarre, Florida


2002

It's difficult to filter. It's better to let it settle and the decant the clear recovered solution through a filter.

Lyle Kirman
consultant - Cleveland Heights, Ohio

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