2289.     MITCHELL, R.  Petroleum Reprieve.  Wisconsin Eng., vol. 52, No. 2, 1947, pp. 10, 32; Chem. Abs., vol. 42, 1948, p. 5201.

        Production of cheap O₂ has made the Fischer-Tropsch process for producing synthetic hydrocarbons practical in America.  The development of the fluid-bed catalyst reactor has improved quality.  By controlling the rate of heat removal from the reacting constituents, different properties can be given to the product.