619.    ---------------.  [COLLIERY GUARDIAN.]  German Fischer-Tropsch and Allied Processes.  Vol. 172, 1946, p. 589.

     Brief review of information digested from the CIOS reports on process development in the Fischer-Tropsch synthesis. The Lurgi Gesellschaft had been given all rights for the construction of future plants, and their research staff had developed and patented the recirculation of synthesis gas, pressure gasification, and the use of Fe catalysts.  The advantages are stated to be:  higher gas velocity and easier heat control; no hydrogenation of olefins to paraffins; and suppression of cracking by the high CO:H₂ ratio, giving less CH₄ and less C.