How to get chromium from sodium dichromate?
June 26, 2021
Directly, one reaction is impossible, you need to go to chromium (VI) oxide, and then pure chromium can be reduced from it.
1. We obtain pure chromium oxide by reducing sodium dichromate with coke:
Na2Cr2O7 + 2C = Cr2O3 + Na2CO3 + CO ↑.
2. Now let’s get metallic chrome using metallic aluminum:
2Al + Cr2O3 = Al2O3 + 2Cr.
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