2936.     RUHEMANN, M.  Large-Scale Oxygen Production.  Internat. Cong. Pure Appl. Chem, 11th Cong., 1947; British Abs., 1948, B, I, p. 300.

        Economics of the production of O2 so that it can compete with liquid air is reviewed.  The development of new units, including expansion turbines, turbocompressors, packed regenerators and reversing heat exchangers with extended surfaces, have led to increased efficiency and reduction of losses.