PATENTS

3508.   ------.  [SOCIETA ANON. PRODOTTI ITALIANI SINTETICI.]  Hydrocarbon Synthesis Process.  British Patent 630,950, Nov. 9, 1946.  British Coal Utilisation and Research Assoc., Monthly Bull., vol. 14, No. 1, p. 22; Chem. Abs., vol. 44, 1950, p. 5081.

Improved Fischer synthesis employing an Fe, Ni, or Co catalyst, wherein the feed gases are diluted with steam (1-20 mol. % of total feed) and a portion of the catalyst is led continuously from the synthesis zone to the hydrogenation zone.  The temperature is 550°-1,100° F., pressure 100-750 p.s.i.  The catalyst is reduced in the presence of H₂ and then returned to the synthesis zone.