Copper chromite Chemical Properties

Density 

5.400

vapor pressure 

0-0.08Pa at 190-200℃

solubility 

insoluble in H2O, dilute acid solutions

form 

Powder

color 

Brown to black

Water Solubility 

insoluble H2O, dilute acids, conc HCl [MER06]

InChI

InChI=1S/2Cr.Cu.4O

InChIKey

FULFYAFFAGNFJM-UHFFFAOYSA-N

SMILES

O([Cr]=O)[Cr]=O.O=[Cu]

EPA Substance Registry System

Chromium copper oxide (Cr2CuO4) (12018-10-9)

Safety Information

Hazard Codes 

O,Xi

Risk Statements 

8-37-36/37/38-20/21

Safety Statements 

17-24/25-23

RIDADR 

UN 1479 5.1/PG 2

WGK Germany 

3

HS Code 

28415000

MSDS

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Copper chromite Usage And Synthesis

Chemical Properties

copper chromite is a black, tetragonal powder that is insoluble in water. It is prepared by the heating to 400°C of copper(II) chromate(VI).

Physical properties

Grayish-black tetragonal crystals; density 5.4 g/cm³. When heated to elevated temperatures (above 900°C) copper(II) chromite decomposes to cupric chromate(II), CuCrO₂ and chromium (VI) oxide, CrO₃. Copper(II) chromite is insoluble in water and dilute acids.

Uses

Copper chromite is used as a hydrogenation catalyst.

Preparation

Copper(II) chromite is obtained by heating copper chromate, CuCrO₄ at 400°C. The Adkin catalyst, a mixture of copper oxide and copper chromite, is prepared by mixing aqueous solutions of copper nitrate, sodium dichromate and ammonium hydroxide; the orange precipitate of copper ammonium chromate formed is dried and then heated below 400°C.

Application

Copper chromite is primarily used as a catalyst forhydrogenation reactions because of its ability to hydrogenate functional groupsin aliphatic and aromatic compounds selectively. Industrially, copper chromiteis used to reduce furfural to furfuryl alcohol and butyraldehyde to 1-butanol,partially reduce conjugated dienes to monoenes, and selectively reduce carbonylgroups in vegetable oils. This CuCr catalyst is studied for a variety ofcatalytic applications including converting the hydrogenolysis of cellulose.It is also used as a catalyst for combustion to help control burn rate and as alight-absorbing pigment.

General Description

Copper chromite is a black powder and inorganic pigment thatadopts a spinel crystal structure. It can be made by the high-temperaturecalcination of copper(II) oxide and chromium(III) oxide or the thermaldecomposition of copper chromate, which evolves oxygen at higher temperaturesand decomposes to copper chromite.

Copper chromite (12018-10-9)Related Product Information

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• Copper chromite
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• Graphite