Patent GB-813443-A (GB)
Title: Improvements relating to the production of hydrogen
IPC: C10G65/04
Filed: 1955-05-12
Abstract: <PICT:0813443/III/1> A petroleum distillate having an initial b.p. above 200 DEG  C., e.g. a gas oil, which has been subjected to catalytic desulphurization is passed together with hydrogen over a catalyst consisting of a platinum metal supported on a metal oxide at elevated temperature and pressure, thereby producing a hydroformed oil and a hydrogen rich gas, part of said gas being recycled to the hydroforming process and part or all of the remainder being recycled to the desulphurization process.  The desulphurization stage may be carried out at a temperature of 600-800 DEG  F., a pressure of 100-1500 p.s.i.g., a space velocity of 0.5-15 v/v/hr., and a gas recycle rate of 200-4000 SCF/B, and with a catalyst comprising cobalt and molybdenum oxide supported on alumina.  The reforming stage may be carried out at a temperature of 600-850 DEG  F., a pressure of 50-500 p.s.i.g., a space velocity of 1-10 v/v/hr., and a gas recycle rate of 1000-4000 SCF/B and with a catalyst consisting essentially of platinum on alumina and preferably also containing a fluorine compound.  As shown, feedstock fed through line 10 is desulphurized in reactor 12 after admixture with hydrogen, which is recycled through line 13 partly from the desulphurization stage via line 17 and partly from the subsequent hydroforming stage via lines 30 and 13a, and passage through heater 11.  The product passes through a heat exchanger 14 and cooler 15 to a high-pressure separator 16, from which hydrogen containing gas is recycled via line 17 and from which liquid product passes via heat exchanger 14, hydrogen sulphide stripping tower 20, and line 21, to the hydroforming stage.  The desulphurized product is hydroformed in reactor 23 after admixture with hydrogen, which is recycled via line 29, and passage through heater 22.  The product passes through a cooler 24 to a high-pressure separator 25, from which hydrogen is partly recycled to the desulphurization and hydroforming stages via lines 29 and 13a respectively, and partly passed to the hydrogen sulphide stripping tower via line 31.  The liquid product is removed via line 28.  The liquid product may have a specific gravity of 0.837, a bromine number of 5.9 and a boiling point range of 91-361 DEG  C.ALSO:A petroleum distillate having an initial b.p. above 200 DEG  C., e.g. a gas oil, which has been subjected to catalytic desulphurization is passed together with hydrogen over a catalyst consisting of a platinum metal supported on a metal oxide at elevated temperature and pressure, thereby producing a hydroformed oil and a hydrogen rich gas, part of said gas being recycled to the hydroforming process and part or all of the remainder being recycled to the desulphurization process.  The desulphurization stage may be carried out at a temperature of 600-800 DEG  F., a pressure of 100-1500 p.s.i.g., a space velocity of 0.5-15 v/v/hr, and a gas recycle rate of 200-4000 SCF/B, and with a catalyst comprising cobalt and molybdenum oxide supported on alumina.  The reforming stage may be carried out at a temperature of 600-850 DEG F., a pressure of 50-500 p.s.i.g. a space velocity of 1-10 v/v/hr., and a gas recycle rate of 1000-4000 SCF/B and with a catalyst consisting essentially of platinum on alumina and preferably also containing a fluorine compound.  As <PICT:0813443/IV (b)/1> shown, feedstock fed through line 10 is desulphurized in reactor 12 after admixture with hydrogen, which is recycled through line 13 partly from the desulphurization stage via line 17 and partly from the subsequent hydroforming stage via lines 30 and 13a, and passage through heater 11.  The product passes through a heat exchanger 14 and cooler 15 to a high-pressure separator 16, from which hydrogen containing gas is recycled via line 17 and from which liquid product passes via heat exchanger 14, hydrogen sulphide stripping tower 20, and line 21, to the hydroforming stage.  The desulphurized product is hydroformed in reactor 23 after admixture with hydrogen, which is recycled via line 29, and passage through heater 22.  The product passes through a cooler 24 to a high pressure separator 25, from which hydrogen is partly recycled to the desulphurization and hydroforming stages via lines 29 and 13a respectively, and partly passed to the hydrogen sulphide stripping tower via line 31.  The liquid product is removed via line 28.  The liquid product may have a specific gravity of 0.837, a bromine number of 5.9 and a boiling-point range of 91-361 DEG  C.