519.    ---------------.  [CHEMICAL ENGINEERING.]  New Way to Make Heavy Water.  Vol. 57, No. 3, 1950, p. 69.

                  Atomic Energy Commission plans construction of a plant to produce heavy water by a new and much cheaper process at only about one-fifth of the old cost.  The process to be employed is low-temperature distillation of extremely large volumes of H₂, such as are obtained in the off gas from large synthetic fuels or synthetic NH₃ plants.  Total estimated cost of a plant at existing synthetic plants is $5,000,000.  Surveys are under way to determine the selection of a plant site.  There are about 20 synthetic NH₃ plants in the United States.