Patent GB-463333-A (GB)
Title: Improvements in the production and recovery of light hydrocarbons from gas mixtures produced in the heat treatment of carbonaceous materials at elevated temperatures
IPC: C10G47/00
Filed: 1935-07-22
Abstract: <PICT:0463333/IV/1> Saturated gaseous hydrocarbons, e.g. ethane, propane, butane, pentane and their isomers are recovered from gas mixtures expelled from liquid products obtained in the distillation of tars, oils, &c. or in the cracking or hydrogenation in the liquid phase of carbonaceous materials, by expelling the gas mixtures, held in solution, in the liquids, by reduction in pressure or increase in temperature, and introducing them into a hydrogenation treatment carried out in the gas phase and recovering the light hydrocarbons from the effluent products of the gas phase.  The hydrogenation in the gas phase is carried out at from 200--600 DEG  C. and at pressures from atmospheric up to 1000 atmos. and in presence of the usual catalysts.  1000 cubic metres of a gas havin the composition <FORM:0463333/IV/1> per cent obtained from the liquid-phase treatment of a destructive hydrogenation treatment carried out in a vessel 1 are dissolved in a vessel 2 under 300 atmos. pressure in the condensate of the vaporous products leaving through the tube 3 and in the washing oil circulated through the pressure release vessels 4, 5, compressor 6, and vessel 2.  If the pressure is released to 50 atmos. in vessel 4, then there escape 520 metres of a gas having the composition <FORM:0463333/IV/2> per cent which may be further worked up in order to recover the hydrogen or used as heating gas.  On further releasing the pressure in the vessel 5 to atmospheric, 480 cubic metres of gas are obtained having the composition <FORM:0463333/IV/3> per cent and are introduced through tube 7 into the cycle tube 12 of the gas-phase reaction vessel 11 through a compressor 8.  The products of the gas-phase hydrogenation are distilled in a vessel 13 and a gas is obtained of the composition <FORM:0463333/IV/4> per cent.  The liquid products issuing from the reaction vessel 1 pass through pressure release vessels 14, 15 and are finally distilled in a vessel 16.  The gases liberated from the vessels 4 and 14 may be combined while the gases from the vessels 15 and 16 are also combined and may also be compressed in the compressor 8 and introduced into the gas-phase treatment.ALSO:Saturated gaseous hydrocarbons, e.g. ethane <PICT:0463333/III/1> propane, butane, pentane and their isomers are recovered from gas mixtures expelled from liquid products obtained in the distillation of tars, oils, &c. or in the cracking or hydrogenation in the liquid phase of carbonaceous material, by expelling the gas mixtures, held in solution in the liquids, by reduction in pressure or increase in temperature, and introducing them into a hydrogenation treatment carried out in the gas phase and recovering the light hydrocarbons from the effluent products of the gas phase.  The hydrogenation in the gas phase is carried out at from 200--600 DEG  C. and at pressures from atmospheric up to 1000 atmos. and in presence of the usual catalysts.  1000 cubic metres of a gas having the composition <FORM:0463333/III/1> per cent obtained from the liquid-phase treatment of a destructive hydrogenation treatment carried out in a vessel 1 are dissolved in a vessel 2 under 300 atmos. pressure in the condensate of the vaporous products leaving through the tube 3 and in the washing oil circulated through the pressure release vessels 4, 5, compressor 6, and vessel 2.  If the pressure is released to 50 atmos. in vessel 4, then there escape 520 metres of a gas having the composition <FORM:0463333/III/2> per cent which may be further worked up in order to recover the hydrogen or used as heating gas.  On further releasing the pressure in the vessel 5 to atmospheric, 480 cubic metres of gas are obtained having the composition <FORM:0463333/III/3> per cent and are introduced through tube 7 into the cycle tube 12 of the gas-phase reaction vessel 11 through a compressor 8.  The products of the gas-phase hydrogenation are distilled in a vessel 13 and a gas is obtained of the composition <FORM:0463333/III/4> per cent.  The liquid products issuing from the reaction vessel 1 pass through pressure release vessels 14, 15 and are finally distilled in a vessel 16.  The gases liberated from the vessels 4 and 14 may be combined while the gases from the vessels 15 and 16 are also combined and may also be compressed in the compressor 8 and introduced into the gas-phase treatment.