Systematic adsorption studies have not been made on soap samples of known crystalline form. Recent investigations in soap chemistry have been directed to the practical determination of the soap-water phase diagram and to the complex problem of soap polymorphism. The results show a myriad of stable hydrates and crystalline forms whose interrelationship is not clearly understood. The adsorption properties of established soap forms, which may explain some of the anomalous findings, have not been determined. To measure the surface properties of certain crystalline soap forms, water vapor isotherms at two temperatures have been obtained. Theoretical and structural considerations and thermodynamic calculations are utilized to partially explain the complicated adsorption which is observed.

Abstract Not Available.

Vapor-liquid equilibrium compositions for the system hydrogen-nitrogen-carbon monoxide were determined at -310°F, and -280°F and -240°F from 300 psig to the critical. PVT data for hydrogen were fitted to the Benedict-Webb-Rubin equation of state and vapor-liquid equilibria predicted by the equation of state were compared to the experimental data. The equation of state predicted the K-values for nitrogen and carbon monoxide with an accuracy of about 5% while the hydrogen K-values were predicted with an accuracy of about 15%. The hydrogen-nitrogen-carbon monoxide binary data were also correlated by the Margule equation. A method for predicting K-values at infinite dilution in a ternary system is proposed. With the proposed method the binary data and a limited amount of ternary data permit the prediction of K-values at infinite dilution with an accuracy of about 10%.

The vacuum behavior of radioactive and non-radioactive semiconducting films of CdS has been studied as a function of time in order to determine the effect of radioactive doping. Radioactive films containing S35 were made by reacting radioactive H2S with thin films of Cd metal. S35 decays with the emission of a weak beta to Cl35. The specific activity of the sulfur used in the experiments was sufficient to produce 1018 chlorine impurities/cm 3 in the CdS lattice during the first month of decay.

Abstract Not Available.

This work further develops a technique for changing the electronic and defect structure of magnesium oxide and silica gel catalysts. Relatively small doses of ultraviolet and neutron irradiation have been found to enhance greatly the catalytic activity of MgO for the reaction H 2 + D2 &rlhar2; 2HD. The enhancement by radiation depends on the extent of degassing of the catalyst prior to irradiation; the less active samples are more sensitive to irradiation. For samples activated at 291°C, ultraviolet irradiated MgO reaches a precise saturation value of catalytic activity, while neutron irradiated samples continue to increase in activity upon further irradiation. Both types of irradiation produce a large initial increase in activity. Changes in activation energy depend on the thermal activation and type of irradiation. The activation energy either increases or remains unchanged for neutron irradiation, while ultraviolet irradiation does not cause a change. For this system, a simple model based upon Fe+3 as the irradiation induced site has been developed.

Abstract Not Available.

The purpose of this work was to study the influence of certain variables in the preparation of an alumina-silicon-fluoride complex on its behavior as a cracking catalyst.

Abstract Not Available.

Experimental equilibrium data have been determined for 175 mixtures of methane, ethane, and propane. The investigation included temperatures from 50°F to -200°F and pressures up to the critical. A vapor recycle apparatus was used to establish equilibrium. Phase samples were analyzed by infrared spectrophotometer and gas-liquid partition chromatography.