Synthesis of Copper Chromite

Dissolve 12.6 g of ammonium dichromate in 32 mL of water then add 42 mL of 10% ammonia. Dissolve 25 g of copper sulfate in 60 mL of water and with vigorous stirring, combine both solutions. Stir for 5 minutes and filter, then transfer the filtered sludge to a drying plate. Dry in a hot water bath. Heat the powder in a crucible at 400°C for 15 minutes with some stirring. Then combine the black powder with 200 mL of 30% acetic acid, stir for 30 minutes, filter and wash with 100 mL of water. Then dry the copper chromite catalyst.

2CuSO4 + K2Cr2O7 + 4NH3 + 3H2O = 2Cu(OH)NH4CrO4 + K2SO4 + (NH4)2SO4

2Cu(OH)NH4CrO4 = CuO + CuCr2O4 + 5H2O

Source

After addition of the ammonia

Combination of the solutions

Filtration

Drying the chromite complex

Pyrolyzation of the complex

Removal of formed copper oxide with acetic acid

Filtration

The dried pure product

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