Patent ID: 8487151

Claim:
The device for filtration and pre-distribution of a gas phase and a liquid phase supplied to a catalytic reactor operating in gas and liquid co-current downflow mode, said device for filtration and pre-distribution comprising: a perforated plate having orifices ( 7 ) with diameter (d 0 ) and substantially vertical vents ( 3 ) fixed on said perforated plate which are open at their upper end to admit gas, and open at their lower end to evacuate gas, said perforated plate supporting a filtration bed surrounding the vents; at least one overflow tube ( 4 ) extending substantially vertically from an upper level located below the level of the upper end of the vents and which remains contained within the filtration bed ( 2 ), to a lower level below said perforated plate; said filtration bed comprising at least one layer of particles with a size in the range from the diameter (d 0 ) of the orifices ( 7 ) of said device to a value which does not exceed 30 mm.