Patent GB-855120-A (GB)
Title: Method of supplying a catalyst to a reaction zone and apparatus therefor
IPC: B01J3/02
Filed: 1957-05-01
Abstract: <PICT:0855120/IV(a)/1> In a method for supplying a catalyst in the form of a slurry to a reaction zone for the conversion of olefinic materials to polymeric material, the slurry is circulated in a circulating system under turbulent conditions to avoid segregation separation thereof, and a small portion of the slurry thus circulated is removed and supplied to the reaction zone.  Chromia-silica-alumina catalyst is conveyed by a dry inert gas through conduit 1 (Fig. 1) to a bag filter 2, where the gas is removed by conduit 3, and the catalyst is fed by a screw conveyer 30 to a slurry mix tank 6 supplied with polymerization solvent by a line 7 and sparger 9. Tank 6 is heated to remove dissolved gases, and a slurry is formed by agitation.  The slurry is cooled by circulation through conduits 16, 17 and 19 and a heat exchanger 18, and then, after cooling, through conduits 16, 20 and 19, the rate being such that the flow is turbulent.  A small side stream is taken by a conduit 22 to the reaction zone (not shown).  In a modification the side stream of slurry is fed to a tank where it is agitated to maintain turbulence, and is circulated through another circulating system, with turbulence, from which a side stream is continuously fed to the reaction zone.  In another method (Fig. 3) catalyst is fed from a hopper 51 to a chamber 53 where it is fluidized by inert gas entering by a line 54, the fluidized catalyst being conveyed by a conduit 55 to a perforated conduit 56 in a vessel 57 into which solvent is passed by lines 58 and 59 under sufficient pressure to cause the solvent to pass through the perforated pipe 56 with turbulence.  The mixed catalyst and solvent then passes to a flash tank 60 where the temperature and pressure are adjusted so that the inert gas is flashed from the slurry and removed by a pipe 64.  The slurry in tank 60 is passed through a conduit 80 and circulated in a circuit 82 by a pump 83, from where it is fed by one or more lines 84 to one or more reactors (not shown).  The olefinic material may be ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1, 3-butadiene or isoprene.  The polymerization may be conducted at 150 DEG  to 450 DEG F. in the gaseous, liquid or mixed phase.ALSO:<PICT:0855120/III/1> In a method for supplying a catalyst in the form of a slurry to a reaction zone the slurry is circulated in a circulating system under turbulent conditions to avoid segregation separation thereof, and a small portion of the slurry thus circulated is removed and supplied to the reaction zone. Chromia-silica-alumina catalyst is conveyed by a dry inert gas through conduit 1 (Fig. 1) to a bag filter 2, where the gas is removed by conduit 3, and the catalyst is fed by a screw cenveyer 30 to a slurry mix tank 6 supplied with solvent by a line 7 and sparger 9.  Tank 6 is heated to remove dissolved gases, and a slurry is formed by agitation. The slurry is cooled by circulation through conduits 16, 17 and 19 and a heat exchanger 18, and then, after cooling, through conduits 16, 20 and 19, the rate being such that the flow is turbulent.  A small side stream is taken by a conduit 22 to the reaction zone (not shown).  In a modification the side stream of slurry is fed to a tank where it is agitated to maintain turbulence, and is circulated through another circulating system, with turbulence, from which a side stream is continuously fed to the reaction zone.  In another method (Fig. 3) catalyst is fed from a hopper 51 to a chamber 53 where it is fluidized by inert gas entering by a line 54, the fluidized catalyst being conveyed by a conduit 55 to a perforated conduit 56 in a vessel 57 into which solvent is passed by lines 58 and 59 under sufficient pressure to cause the solvent to pass through the perforated pipe 56 with turbulence. The mixed catalyst and solvent then passes to a flash tank 60 where the temperature and pressure are adjusted so that the inert gas is flashed from the slurry and removed by a pipe 64.  The slurry in tank 60 is passed through a conduit 80 and circulated in a circuit 82 by a pump 83, from where it is fed by one or more lines 84 to one or more reactors (not shown).