Untersuchungen über die Grundlagen zum Bau von Transportgefäßen für verflüssigte Gase

Apparatus and methods for Precise Fractional-Distillation Analysis 11. Laboratory Columns for Precise and Rapid Fractionation of Gaseous and Liquid Samples

“…Smoluchowski (88) discloses a vacuum vessel with the vacuous space filled with lycopodium powder and claims high insulating effectiveness. Banneitz, Gerbo, and Kurcze (1) give the results of very comprehensive experiments on the design and manufacture of vacuum containers. They find that silvered screens provided with minimum thermal contact with the walls of iron vacuum containers considerably improved the thermal insulating effectiveness of the containers.…”

“…The slide is, of course, very well ground and lapped into the body of the change block and must be greased with a suitable lubricant to prevent leakage at even very low pressures. Bruun (1) mentions lubricants which are especially suitable for distillation of aliphatic hydrocarbons. However, fairly good results may be obtained with ordinary heavy oil or glycerol.…”