Sell Copper chromite Cas 1205-53-18-8
,

Sell Copper chromite Cas 1205-53-18-8

Categories: ,

Sell Copper chromite Cas 1205-53-18-8

Sell Copper chromite Cas 1205-53-18-8

Description générale

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.

Application

Copper chromite is primarily used as a catalyst for hydrogenation reactions because of its ability to hydrogenate functional groups in aliphatic and aromatic compounds selectively. Industrially, copper chromite is used to reduce furfural to furfuryl alcohol[1] and butyraldehyde to 1-butanol,partially reduce conjugated dienes to monoenes, and selectively reduce carbonyl groups in vegetable oils. This CuCr catalyst is studied for a variety of catalytic applications including converting the hydrogenolysis of cellulose[2].It is also used as a catalyst for combustion to help control burn rate and as alight-absorbing pigment. Copper chromite/graphene oxide nanocomposite canbe used in energy storage applications.

INFORMATIONS SUR LA SÉCURITÉ

Pictograms

GHS03,GHS07,GHS09

Mention d’avertissement

Danger

Mentions de danger

H272 – H335 – H410

Classification des risques

Aquatic Acute 1 – Aquatic Chronic 1 – Ox. Sol. 2 – STOT SE 3

Organes cibles

Respiratory system

Code de la classe de stockage

5.1B – Oxidizing hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Point d’éclair C

Not applicable

Équipement de protection individuelle

dust mask type N95 (US), Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

Copper chromite is an inorganic compound with the formula Cu2Cr2O5. It is a black solid that is used to catalyze reactions in organic synthesis.[3]

History of Copper chromite

The material was first described in 1908.[4] The catalyst was developed in North America by Homer Burton Adkins and Wilbur Arthur Lazier, partly based on interrogation of German chemists after World War II in relation to the Fischer–Tropsch process.[5][6] For this reason it is sometimes referred to as the Adkins catalyst or the Lazier catalyst.

Chemical structure of Copper chromite

The compound adopts a spinel structure. The oxidation states for the constituent metals are Cu(II) and Cr(III).[7] A variety of compositions are recognized for the substance, including Cu2CrO4·CuO·BaCrO4 (CAS# 99328-50-4) and Cu2Cr2O5 (CAS# 12053-18-8). Commercial samples often contain barium oxide and other components.

Production of Copper chromite

Copper chromite is produced by thermal decomposition of one of three substances. The traditional method is by the ignition of copper chromate:[8]

2 CuCrO
4 → 2 CuCrO
3 + O
2

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:[5]

Ba
2Cu
2(NH
4)
2(CrO
4)
5 → CrCuO
3 + CuO + 2 Ba + 4 H
2O + 4 Cr + N
2 + 6 O
2

Copper ammonium chromate is also used for production of copper chromite. It is generally utilized as an alternative to the route of barium ammonium chromate for usage in chemicals reactive with barium. This can also be washed with acetic acid and dried to remove impurities. Copper chromite is produced through the exposure of copper ammonium chromate to temperatures of 350-450 °C:

Cu(NH
4)
2(CrO
4)
2 → CrCuO
3 + CrO + 4 H
2O + N
2

An active copper chromite catalyst which includes barium in its structure can be prepared from a solution containing barium nitrate, copper(II) nitrate, and ammonium chromate. When these compounds are mixed a resulting precipitate is formed. This solid product is then calcined at 350–400 °C to yield the catalyst:[8]

Cu(NO3)2 + Ba(NO3)2 + (NH4)2CrO4 → CuCr2O4·BaCr2O
Sell Copper chromite Cas 1205-53-18-8
Sell Copper chromite Cas 1205-53-18-8
Sell Copper chromite Cas 1205-53-18-8
Sell Copper chromite Cas 1205-53-18-8
Sell Copper chromite Cas 1205-53-18-8
Sell Copper chromite Cas 1205-53-18-8
Sell Copper chromite Cas 1205-53-18-8
Sell Copper chromite Cas 1205-53-18-8

CAS 12053-18-8 | SCBT – Santa Cruz Biotechnology

Reviews

There are no reviews yet.

Be the first to review “Sell Copper chromite Cas 1205-53-18-8”

Your email address will not be published. Required fields are marked *

Related products

Shopping Cart