PATENT

3537. ----- [STANDARD OIL CO.]  Production of Fuel Gas.  British Patent 632,386, 1949.  Fuel Abs., vol. 7, 1950, abs. 3165.

This as a process for increasing the heating value of tail gas obtained by reacting CO and H₂ in presence of Fischer synthesis condition and removing normally liquid synthesis products from the total synthesis product, which comprises contacting the tail gas in a conversion zone with a hydrogenating conditions adapted for the substantially exclusive formation of saturated normally gaseous hydrocarbons whereby a final hydrogenated tail gas is produced, which contains a normally gaseous mixture of high heating value having a H₂ content amounting to only a small fraction of that of the initial tail gas.