Some characteristics of stedman packing in the distillation of hydrogen and its isotopes

Abstract

Apparatus was des igncd and constructed in which so me characteri stics of Stedman packing in t he d isti ll ation of hyd rogen isotopes were meas ured . The ave rage st ill hold-up and the hold-up at various boi l-up rates were measured usin g both hydrogen a nd de ute rium as still charge. Mixtures of hyd rogen-hydro gen deuteride of kn own compositi o n wcrc di stilled at boil-up rates of 454 millili ters p er hour a nd 1,190 milliliters pe r hour, res pective ly. From the dist ill ation data th e heigh t equivalent to a t heo retical plate was calcu lated and found to be 1.0 inch for t he 12-inch packin g used in these experiments.

The P, T, x relationships of H2+HD and H2+D2mixtures between 18° and 28°K

“…Except for the quantities involved and the type of condenser used, the method of HD generation was the same as that described by Fookson, Pomerantz and Rich,23 using the reaction, The still is a copy of that described in ref. (24), and its packing is made in the fashion recommended by Stedman,25 of 2500-meshY 0.010 in. monel-metal gauze.…”

Distillation Analysis

“…Two papers discuss refrigerant supply (4,110). Fookson et al (24) have evaluated Stedman packing in the distillation of hydrogen isotopes. Orrick and Gibson's (74) complete metal apparatus for low temperature distillation of corrosive materials is worthy of study for use in other connections.…”