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Removal of Barium sulphate From Recovered Chromic Acid Solution

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 sulphates. What is a good way to remove the Barium sulphate 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
2002

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