Preparation of High-Purity Vanadium Metalb by the Iodide Refining Process

Abstract

The preparation of vanadium of 99.95 + % purity by the Van Arkel‐deBoer iodide process is described. Conditions for optimum growth rate and maximum purity were determined. Data on impurity transfer from the feed to the hot filament are presented together with a discussion of contamination by the retort. The quality of vanadium obtained from feed material prepared by bomb reduction and by a sponge process is compared. Some physical properties of this metal are reported. An apparatus designed to prepare several pounds per batch is described.