摘要:

Some chemical and physical properties of dichlorine hexoxide are described and attention is drawn to its dangerous property of exploding violently on contact with organic substances.The extinction coefficient of solutions of dichlorine hexoxide in carbon tetrachloride solution for a wave-length of 5460 Å has been measured and found to be 2.4, which is very much less than that of liquid dichlorine hexoxide for the same wave-length. A colorimetric method is described for the quantitative estimation of dichlorine hexoxide in solutions. The molecular weight of dichlorine hexoxide in carbon tetrachloride solution has been redetermined, and it confirms the formula Cl2O6.Solutions of dichlorine hexoxide in carbon tetrachloride are decomposed photochemically by green light. Gaseous chlorine trioxide (ClO3) is decomposed photochemically by λ3650. Its decomposition is photosensitized by chlorine and bromine, the quantum yield in the chlorine sensitized reaction being about 1.

ISSN:1923-4287    

DOI:10.1139/cjr38b-048

出版商:NRC Research Press    

年代:1938

数据来源: NRC

摘要:

The behavior of glycerol in increasing the time of set of alkaline silica gels is not anomalous. There is a regular and further increase in time of set when the higher members of a series of polyhydric alcohols are added to the gels. The rate of change in the effect produced by increasing concentration of the addition agent varies with the concentration and pH. With the 2.23% gel, at pH 8.2, glycol showed a reversal of its effect on the time of set. The implications of this change are discussed.

ISSN:1923-4287    

DOI:10.1139/cjr38b-049

出版商:NRC Research Press    

年代:1938

数据来源: NRC

摘要:

The densities and compositions of both phases in the methane-n-heptane solubility equilibrium have been determined at 25°, 55°, and 85 °C. at total pressures from 35 to 250 atm. The critical pressures of complete miscibility were found, and the properties of the system are discussed. The nitrogen-n-heptane system was investigated similarly at 100.9 atm. and temperatures from 25° to 115 °C. The system composed of Viking natural gas and impure heptanes was also investigated at 25 °C. The three systems, methane-pentane, -hexane, and -heptane are compared and discussed.

ISSN:1923-4287    

DOI:10.1139/cjr38b-050

出版商:NRC Research Press    

年代:1938

数据来源: NRC

摘要:

The kinetics of the thermal decomposition of propane has been investigated over a temperature range from 551° to 602 °C. The limiting high pressure first order rate constants are given byThe first order rate constants fall off strongly with increasing percentage decomposition, and the rate decreases with decreasing pressure in a manner similar to the rate decrease in the decomposition of the butanes.Analyses of the products of reaction at various stages show them to be independent of temperature over the range examined, but to be affected by the initial pressure. This effect is undoubtedly due to the secondary hydrogenation of some of the initial products. The analytical results are in excellent agreement with those of Frey and Hepp.

ISSN:1923-4287    

DOI:10.1139/cjr38b-051

出版商:NRC Research Press    

年代:1938

数据来源: NRC