СоединенияОрганические соединенияCopper chromite CAS 12053-18-8

copper chromite uses

Copper chromite is mostly employed as a catalyst for hydrogenation processes because to its selective ability to hydrogenate functional groups in both aliphatic and aromatic molecules. Copper chromite is utilised in industrial processes to catalytically convert furfural into furfuryl alcohol and butyraldehyde into 1-butanol. It is also employed to partially convert conjugated dienes into monoenes and selectively reduce carbonyl groups in vegetable oils. The CuCr catalyst is being investigated for many catalytic applications, including its use in the hydrogenolysis of cellulose.Additionally, it serves as a catalyst for combustion, aiding in the regulation of burn rate, and functions as a light-absorbing pigment.

copper chromite reduction and passivation

The copper chromite catalyst is used in the reduction of fatty esters into higher alcohols. In this reaction the copper chromite catalyst, CuO/CuCr2O4*, is reduced to Cu/Cr2O3* by hydrogen. In this reduction a part of the water formed is adsorbed onto the catalyst and gives Cu/Cr2O3.

The easiest way to passivate your copper items is simply by exposing them to the elements. Leave them outside for somewhere between four and eight weeks, then check to see whether a dull blue-green patina has begun to form. This colouring actually helps to prevent further corrosion from forming.

copper chromite synthesis

Copper chromite is produced by thermal decomposition of one of three substances. The traditional method is by the ignition of copper chromate:
2CuCrO4 → 2CuCrO3 + O2.
Copper barium ammonium chromate is the most commonly used substance for production of copper chromite. The resulting copper chromite mixture produced by this method can only be used in procedures that contain materials inert to barium, as barium is a product of the decomposition of copper barium ammonium chromate, and is thus present in the resulting mixture. The by-product copper oxide is removed using an acetic acid extraction, consisting of washing with the acid, decantation and then heat drying of the remaining solid to yield isolated copper chromite. Copper chromite is produced by the exposure of copper barium ammonium chromate to temperatures of 350-450 °C, generally by a muffle furnace:
Ba2Cu2(NH4)2(CrO4)5 → CrCuO3 + CuO + 2Ba + 4H2O + 4Cr + N2 + 6O2.

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