Results 141 to 150 of about 3,272 (193)

Sintering of chromic oxide

Refractories, 1975
An investigation of the composition and crystallization of pigmental and metallurgical chromic oxide showed that the crystal size of the pigmental chromic oxide increases during roasting.
E. V. Degtyareva, I. L. Boyarina, A. I. Portnova, P. P. Krivoruchko, I. S. Kainarskii, B. G. Alapin, S. V. Lysak, N. V. Gulko   +7 more
openaire   +1 more source

The morphology of oxide reduction: Chromic oxide

Journal of Materials Science, 1967
The mechanism of the high shrinkage that occurs in chromic oxide in reducing conditions has been investigated by micrographic, analytical, electrical resistance, and other means. The effect of the reducing conditions is to modify the surface of the oxide particles, the core remaining normal oxide (i.e. oxygen excess).
H. E. N. Stone, N. A. Lockington
openaire   +1 more source

Course of the Oxidation of Olefins by Chromic Acid

Nature, 1951
A FURTHER study of the oxidation of olefins by chromium trioxide in acetic anhydride1 has now shown that the initial phase consists of two distinct reactions: (a) attack at a methylene group adjacent to the double bond; (b) oxidation at the double bond.
W J, HICKINBOTTOM, D G M, WOOD
openaire   +2 more sources

The chlorinations kinetics of the chromic oxide

Thermochimica Acta, 1985
Abstract Chlorination kinetics of Cr 2 O 3 was tried on the thermobalance in the temperature range of 900–1100 °C. Obtained degree of the conversion was estimated gravimetricaly from the amount of the evaporated oxychloride from the following reaction : Cr 2 O 3 + 2 Cl 2 + 0,5 O 2 = 2 CrO 2 Cl 2 / g /
Tarzícius Kuffa, Kikolaj Ponevský, Milan Šakrobian   +2 more
openaire   +1 more source

Decomposition of nitrous oxide on chromic oxide

Journal of Catalysis, 1967
Abstract The catalytic decomposition of nitrous oxide was studied with two differently prepared chromic oxides, Catalyst A and Catalyst B. It was found that the reaction proceeded on a limited part of the catalyst surface and the reaction rate could be expressed by the following equation for the two catalysts, r = kP N 2 O (1 + KP
openaire   +1 more source

Sintering chromic oxide with an additive

Refractories, 1975
An investigation was carried out of the influence of certain additives on the sintering of chromic oxide. In an air medium, chromic oxide does not sinter at all without an additive. It achieves slight sintering with added TiO2 and a higher degree of sintering when aluminosilicates are added.
�. V. Degtyareva, I. S. Kainarskii, I. L. Boyarina, A. I. Portnova, B. G. Alapin, S. V. Lysak, P. P. Krivoruchko   +6 more
openaire   +1 more source

Chromic oxide as refractory material

Refractories, 1977
The article deals with chromic oxide and other oxides of chromium and with the systems which chromic oxide forms with other oxides and which are of importance in the production and application of refractories. In most systems Cr2O3 coexists with the other oxides and their high-melting compounds.
I. S. Kainarskii, �. V. Degtyareva
openaire   +1 more source

Mechanism of Chromic Acid Oxidations

Zeitschrift für Physikalische Chemie, 1959
A. C. Chatterji, V. Antony
  +5 more sources

The Heterogeneity of Catalyst Surfaces. II. Zinc Oxide-Chromic Oxide, Manganous Oxide-Chromic Oxide, Chromic Oxide Gel

Journal of the American Chemical Society, 1947
Hugh S. Taylor, Shou-Chu Liang
openaire   +1 more source

Epoxidation of ethylenic linkages by chromic acid. II. Oxidation of triphenyl(tolyl)ethylene by chromic oxide

Journal of Applied Chemistry, 1963
Abstract1,1,2‐Triphenyl‐2‐tolylethylene is oxidised by chromic oxide in acetic anhydride medium to give 1,2‐epoxy‐1,1,2‐triphenyl‐2‐tolylethane with fission products. A tentative explanation of the stability of such epoxides is given. Aqueous chromic acid oxidation brings about oxidative fission of the double bond.
openaire   +1 more source