Patent GB-647052-A (GB)
Title: Improvements in or relating to the catalytic synthesis of hydrocarbons
IPC: C07C1/04
Filed: 1946-08-28
Abstract: <PICT:0647052/IV (b)/1> In a continuous process for the synthesis of liquid hydrocarbons, a gas mixture containing carbon monoxide and hydrogen is passed upwardly through a finely-divided iron catalyst to maintain it in the form of a dense, turbulent, fluidized bed, reaction products are removed overhead, a portion of contaminated catalyst is withdrawn downwardly from a lower portion of the reaction zone and passed to a regeneration zone to which an oxygen-containing gas is charged to maintain said contaminated catalyst in dense, fluidized form under conditions to effect regeneration, and regenerated catalyst is withdrawn downwardly and returned to the reaction zone.  The feed containing a moler ratio of H2 : CO of 0.5-3 : 1 is forced through line 4 into reactor 1 containing an iron-base catalyst which is kept in a fluidized state.  Pressure may be 5-50 atmos. and temperature 450-800 DEG  F.  Gases leave at line 7 and may be in part recycled through line 9.  Catalyst is withdrawn by line 10, mixed with carrier gas such as preheated air and steam in line 11, and passed to oxidation reactor 12, similar to but smaller than reactor 1, wherein it is kept fluidized and carbon is burnt off at temperatures of 1000-2000 DEG  F.  Catalyst is withdrawn through line 19, cooled and returned by line 21. Carrier gas is introduced by line 22.  Combustible gas is supplied through line 131 if necessary to maintain the temperature. Regenerated catalyst is withdrawn through line 23, stripped by an inert gas in zone 15, and recycled through line 4 to reactor 1. Pressure in reactor 12 may be different from that in 1.  Make-up catalyst is fed from hopper 50 through lines 52 and 54.ALSO:<PICT:0647052/III/1> In a continuous process for the synthesis of liquid hydrocarbons, a gas mixture containing carbon monoxide and hydrogen is passed upwardly through a finely-divided iron catalyst to maintain it in the form of a dense, turbulent fluidized bed, reaction products are removed overhead, a portion of contaminated catalyst is withdrawn downwardly from a lower portion of the reaction zone and passed to a regeneration zone to which an oxygen-containing gas is charged to maintain said contaminated catalyst in dense, fluidized form under conditions to effect regeneration, and regenerated catalyst is withdrawn downwardly and returned to the reaction zone.  The feed is forced through line 4 into reactor 1 containing an iron-base catalyst which is kept in a fluidized state.  Gases leave at line 7 and may be in part recycled through line 9. Catalyst is withdrawn by line 10, mixed with carrier gas such as preheated air and steam in line 11, and passed to oxidation reactor 12, similar to but smaller than reactor 1, wherein it is kept fluidized and carbon is burnt off at temperatures of 1000-2000 DEG  F.  Catalyst is withdrawn through line 19, cooled and returned by line 21.  Carrier gas is introduced by line 22. Combustible gas is supplied through line 131, if necessary, to maintain the temperature.  Regenerated catalyst is withdrawn through line 23, stripped by an inert gas in zone 15, and recycled through line 4 to reactor 1.  Pressure in reactor 12 may be different from that in 1.  Make-up catalyst is fed from hopper 50 through lines 52 and 54.