Results 181 to 190 of about 1,079 (210)

INAA for the validation of chromium and copper determination in copper chromite by infrared spectrometry

Journal of Radioanalytical and Nuclear Chemistry, 2006
Composite solid propellants have been used as fuel in the propulsion of rockets. Transition metal oxides such as copper chromite (CuCr 2 O 4 ) are important catalysts added to the propellants to increase the combustion rates. The content of Cu in samples of copper chromite is normally determined by electrogravimetry and the content of Cr by volumetry ...
F. S. Tagliaferro, E. A. N. Fernandes, M. A. Bacchi, E. A. Campos   +3 more
openaire   +1 more source

Study of the deactivation and regeneration of copper chromite on ?-alumina and magnesium chromite on ?-alumina catalysts for fuel combustion

Catalysis Letters, 1992
The causes of the deactivation of catalysts for fuel combustion MeCr2O4/ γ-Al2O3 (Me = Cu or Mg) have been investigated using a variety of complex physical-chemical methods: IRS, ESDR, XPS, TPD and a pulse microcatalytic method. It has been concluded that the observed deactivation of catalysts during fuel combustion is due to the combined effect of ...
D. A. Arendarskii, Z. R. Ismagilov, G. B. Barannik   +2 more
openaire   +1 more source

Formation of copper chromite in chrome ? Magnesite refractories during service in copper-smelters

Refractories, 1971
Copper chromite in chrome — magnesite refractories during service in copper-smelting units can form both on account of free copper oxide separating from the natural chromite without decomposition of the remaining solid solution, and also as a result of the decomposition of the original chromite during its reaction with a mixture of copper oxides and ...
V. M. Ust'yantsev, V. P. Mar'evich, V. A. Perepelitsyn   +2 more
openaire   +1 more source

Kinetics of the medium-temperature reduction of copper chromite with hydrogen

Reaction Kinetics and Catalysis Letters, 2004
The static volumetric method was used to study the kinetics of copper chromite CuCr2O4 reduction with hydrogen at 50-80 kPa and 498, 523 and 580 K. The rate of copper chromite reduction is maximal initially and decreases monotonically with time. This observation suggests that the reduction is not a topochemical process.
I.I. Simentsova, A.V. Khasin, L.P. Davydova, T.M. Yurieva   +3 more
openaire   +1 more source

The Structure of Copper Chromite Activated by Hydrogen

Materials Science Forum, 1996
T.A. Krieger, L.M. Plyasova, L.P. Solovyeva, T.M. Yur'eva, O.V. Makarova   +4 more
openaire   +1 more source

Copper Chromite Catalysts for Reductive Alkylation

I&EC Product Research and Development, 1962
F. S. Dovell, Harold Greenfield
openaire   +1 more source

Oxidation in Decarboxylation of Acids with Copper Chromite

Journal of the American Chemical Society, 1949
William G. Dauben, Peter. Coad
openaire   +1 more source

COPPER CHROMITE CATALYST

Organic Syntheses, 1939
openaire   +1 more source

Replacement for copper chromite catalysts?

Applied Catalysis A: General, 1993
openaire   +1 more source

Copper chromite reduction of ethyl pinonate

Journal of Chemical & Engineering Data, 1969
John Burkett Lewis, Glen W. Hedrick, R. L. Settine   +2 more
openaire   +1 more source