Copper chromite
Synonym(s):Copperchromium oxide
- CAS NO.:12018-10-9
- Empirical Formula: CrCuH2O
- Molecular Weight: 133.56
- MDL number: MFCD00044868
- EINECS: 234-634-6
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-10-25 23:13:37
What is Copper chromite ?
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.
The Uses of Copper chromite
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.
What are the applications of 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.
Properties of Copper chromite
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 |
EPA Substance Registry System | Chromium copper oxide (Cr2CuO4) (12018-10-9) |
Safety information for Copper chromite
Computed Descriptors for Copper chromite
InChIKey | FULFYAFFAGNFJM-UHFFFAOYSA-N |
SMILES | O([Cr]=O)[Cr]=O.O=[Cu] |
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