1. |
THE CATALYTIC OXIDATION OF ETHYLENE TO ETHYLENE OXIDE |
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Canadian Journal of Research,
Volume 27b,
Issue 11,
1949,
Page 813-827
F. L. W. McKim,
A. Cambron,
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摘要:
The catalytic oxidation of ethylene to ethylene oxide was investigated in flow experiments over silver catalysts at atmospheric pressure between 260° and 350 °C. Calcium oxalate and stannous oxide were used as catalyst promoters. Close temperature control was provided by mounting the catalyst on a silver support. At 270 °C. the selectivity increased from about 25%, with ethylene in large excess, to about 55%, with oxygen in large excess. With air constant and in large excess, the over-all reaction rate was found to be proportional to the square root of the ethylene concentration. With ethylene constant and in large excess, the reaction rate was found to be roughly proportional to the oxygen concentration. The presence of methane, ethane, or propane promoted the complete oxidation of ethylene to carbon dioxide and water. In the absence of paraffins the addition of traces of ethylene dichloride only served to poison the catalyst.
ISSN:1923-4287
DOI:10.1139/cjr49b-083
出版商:NRC Research Press
年代:1949
数据来源: NRC
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2. |
THE ULTRAVIOLET ABSORPTION SPECTRA OF ALIPHATIC NITRAMINES, NITROSAMINES, AND NITRATES |
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Canadian Journal of Research,
Volume 27b,
Issue 11,
1949,
Page 828-860
R. Norman Jones,
G. Denis Thorn,
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摘要:
The ultraviolet absorption bands associated with the following groups have been investigated in a variety of compounds of known structure:The groups may be characterized by the ultraviolet spectrum, and the number of each type of group present in a given compound may be estimated from an analysis of the shape and intensity of the absorption spectrum. These correlations have been applied to the elucidation of the structure of new compounds isolated in the course of the investigation of the chemistry of 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX).
ISSN:1923-4287
DOI:10.1139/cjr49b-084
出版商:NRC Research Press
年代:1949
数据来源: NRC
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3. |
SOME PROPERTIES OF CESIUM–AMMONIA SOLUTIONS |
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Canadian Journal of Research,
Volume 27b,
Issue 11,
1949,
Page 861-873
J. W. Hodgins,
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摘要:
Measurements of vapor pressure, liquid density, and electrical conductance were made on solutions of cesium in liquid ammonia. The solutions differ from those of the other alkali metals in that there is no indication of liquid–liquid phase separation for concentrations 0.04 Nto 7 N. Experiments on rings of solution frozen in liquid nitrogen make it appear unlikely that the system is superconducting at 77° K.
ISSN:1923-4287
DOI:10.1139/cjr49b-085
出版商:NRC Research Press
年代:1949
数据来源: NRC
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4. |
SOME NOTES ON THE PROPERTIES OF METAL–AMMONIA SOLUTIONS |
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Canadian Journal of Research,
Volume 27b,
Issue 11,
1949,
Page 874-877
J. W. Hodgins,
E. A. Flood,
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摘要:
Some experiments are described that corroborate earlier observations of minute persistent currents in frozen rings of solutions of sodium in ammonia. It is shown, however, that it is unlikely that these currents are due either to superconductivity of the solid or to orientation of crystals in the magnetic field. Comment is made on the presence of two liquid phases in lithium–ammonia solutions.
ISSN:1923-4287
DOI:10.1139/cjr49b-086
出版商:NRC Research Press
年代:1949
数据来源: NRC
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