Diffusion rates F (cm3 STP/cm2 min) of hydrogen from the upstream pressure P (atm) into vacuum through a palladium sheet of thickness L (microns) are represented by logF=3.70+0.68 logP−623/T−logL,except for very thin membranes. Explanations are suggested for the wide discordance of earlier results in the study of the diffusion of hydrogen through palladium.
The polymerization of the trimer and tetramer of dichlorophosphinic nitride was found to be catalyzed by a variety of organic compounds: ethers, carboxylic acids and ketones, and also by metals. The effect of these substances on the polymerization rate at 211° was explored quantitatively. The tetramer was invariably found to react slower than the trimer, and the same order of reactivities was observed in the copolymerization of the two materials. The catalysts all displayed a comparable activity.
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