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Author: Subject: Processing BaSO4 to either carbonate or sulfide
International Hazard

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[*] posted on 9-7-2019 at 07:31

Quote: Originally posted by RogueRose  
I've been reading over the processes of processing barium sulfate into some version that is soluble in water or acid and it seems that the only options are to process with carbon at orange/yellow heat or to boil with excess Na2CO3.

Some people don't believe me, but I have no problems with dissolving BaSO4 in the chromic acid prepeared by Vogel's procedure (dissolving K2Cr2O7 in 98% H2SO4 at 100 degrees C). It undoubtedly removes BaSO4 strains and also can dissolve large amount of BaSO4 at cold. Well, the question is only how much and I plan to check that with pure BaSO4 and compare with pure H2SO4 (the known solvent of BaSO4).

So, you definitely can dissolve BaSO4 in H2SO4 presence, the question is how to get soluble Ba ions from this solution - and SO42- anion is very stable.
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