Abstract: The present invention concerns a radial bed reactor comprising a vessel provided with a reaction zone with a moving catalyst bed. The reactor further comprises, inside the reaction zone: at least two feed distribution tubes, each having a first end in communication with the feed inlet means and a second, closed end, the distribution tubes extending in a substantially vertical manner and being designed to allow the feed to pass through the reaction zone and to retain the catalysts; and at least two effluent collection tubes, each having a first end (14) communicating with the effluent outlet means and a second, closed end (15), the collection tubes extending in a substantially vertical manner and being designed to allow effluent to pass through the collection tube and to retain the catalysts.

Abstract: The catalytic reactor consists of a chamber [1] that contains at least one catalyst bed [2] in solid form, with the reactor being supplied with effluent to be treated by a pipe [3] that empties into a separator [4] between gas and liquid, with the liquid obtained from the separator being collected in a tank, and a plate [9] being arranged between the separator [4] and the solid catalyst bed [2]. The plate [9] consists of at least two closed boxes [10], with at least two vertical tubes [11] provided with openings [12] linking with the interiors of the boxes [10] passing through the boxes, and with the liquid distributor [8] channeling the liquid from the tank into said boxes [10].

Abstract: The invention relates to a catalyst support with an unsymmetrical multi-lobed cross-section in the shape of a helical extrudate having a rotational pitch comprised between 10 and 180° per mm. The invention also relates to a catalyst, a recovery mass or an adsorbent comprising said support. The invention also relates to the process for the preparation of said catalyst support in the shape of helical extrudates.

Abstract: The present invention describes a distributor plate provided with distribution elements having low sensitivity to a lack of horizontality, a distribution element being constituted by two substantially co-axial cylinders termed the inner cylinder (1) and the outer cylinder, the lower horizontal surface (5) separating the two cylinders being closed. The distributor plate is suitable for co-current downflows of gas and liquid, more particularly in “trickle bed” mode. The invention also concerns the application of the distributor plate to processes for the hydrotreatment or hydrogenation of various oil cuts.

Abstract: A plate that allows the distribution of a polyphase mixture in a reactor that operates in the trickle mode and that consists of at least one gaseous phase and at least one liquid phase, with the plate (10) being located above a catalytic particle bed, comprising a number of shafts (3), and a portion of the shafts of the plate, located close to the wall of the reactor chamber, called peripheral shafts, are truncated. The plate is used in a reactor for the purpose of carrying out hydrotreatment, hydrogenation, or oxidation.

Abstract: The present invention describes a combustion zone for a regenerative catalytic unit for the continuous regeneration of catalyst, said combustion zone having an annular shape and being divided into at least two combustion stages, each stage being divided into a number N of radial sectors, which are substantially equal, the catalyst flowing under gravity from one sector of the first combustion stage to the sector located in vertical alignment with the second combustion stage by means of drop legs, and the movement of the combustion gas being such that the combustion gas passes in succession through all of the sectors of the first combustion stage in any order, then all of the sectors of the second stage in any order.

Abstract: The present invention concerns a plate for distributing a polyphase mixture in a reactor operating in trickle bed mode constituted by at least one gas phase and at least one liquid phase, the plate (10) being located above a bed of catalytic particles, comprising a plurality of chimneys (3), characterized in that a portion of the chimneys of the plate located near to the wall of the chamber of the reactor, those termed the peripheral chimneys, have an upper portion which is inclined at an angle with respect to the vertical. The invention also concerns the use of the plate in a reactor with a view to carrying out hydrotreatment, hydrogenation or oxidation reactions.

Abstract: A radial bed catalytic conversion unit having an outer cylindrical chamber (1), an inner chamber (2) which is also cylindrical, the annular zone included between the outer chamber and the inner chamber, termed the reaction zone (I), is filled with catalyst under slow gravitational flow, and the feed is introduced via an inlet pipe (E), connected to an intermediate box (F) which is in turn connected to a plurality of distribution tubes (3) disposed inside the reaction zone (I) in the vicinity of the outer chamber (1).

Abstract: The present invention describes a distributor plate adapted to co-current downflow flows of gas and of liquid, more particularly in the “trickle” mode, said distributor plate integrating a filtration function separate from the distribution function.

Abstract: The invention describes a radial bed catalytic conversion unit having an outer cylindrical chamber (1), an inner chamber (2) which is also cylindrical, the annular zone included between the outer chamber and the inner chamber, termed the reaction zone (1), being filled with catalyst under slow gravitational flow, and the feed being introduced via an inlet pipe (E), connected to an intermediate box (F) which is in turn connected to a plurality of distribution tubes (3) disposed inside the reaction zone (I) in the vicinity of the outer chamber (1).

Abstract: The reactor 1 for continuously regenerating grains of catalyst is composed of a vessel 2 containing an oxychlorination zone 72 positioned above a calcining zone 75 provided with a line for introducing calcining gas 76, the reactor containing an oxychlorination gas injection line 73 opening into the bottom of the oxychlorination zone 72 and a gas evacuation line 74b at the head of the oxychlorination zone, characterized in that the oxychlorination zone 72 contains at least one deflector means 82 for deflecting the flow of grains of catalyst.

Abstract: A reactor for regenerating catalyst grains comprises a vessel having an oxychlorination zone superimposed over a calcining zone having a line for introducing gas. A chamber, disposed between oxychlorination and calcining zones, comprises an internal space located between two plates which are gas tight and impervious to catalyst grains. A plurality of tubes pass through the chamber to allow catalyst to pass from oxychlorination zone to calcining zone. A plurality of means pass through the chamber to allow calcining gas to pass from calcining zone to oxychlorination zone. At least one oxychlorination gas injection line opens into the internal space of the chamber. Each means for passage of calcining gas comprises at least one orifice communicating with the chamber internal space, and a means for evacuating gas which is permeable to gas and impermeable to catalyst grains.

Abstract: Process for hydrotreating a heavy hydrocarbon fraction using a system of switchable fixed bed guard zones each containing at least one catalyst bed including at least one step during which the flow of feed supplied to the first guard zone brought into contact with the feed is partly displaced to the next guard zone downstream, preferably progressively.

Abstract: The reactor 1 that allows continuous regeneration of the catalyst consists of a chamber 2 that comprises an oxychlorination zone superposed on a calcination zone equipped with a pipe for introducing calcination gas 76. A mixing zone 74 is arranged between the oxychlorination zone 72 and the calcination zone 75. The mixing zone 74 is covered by a tray 80 through which a number of tubes 81 pass, making it possible for the catalyst to pass from the oxychlorination zone 72 into the calcination zone 75. The tubes 81 extend vertically at least over the height H of the mixing zone 74. One or more pipes 73 for injecting oxychlorination gas empties/empty into the mixing zone. The tray 80 comprises a number of openings for distributing the gas from the mixing zone 74 into the oxychlorination zone 72 in a homogeneous manner.

Abstract: The reactor 1 that allows continuous regeneration of catalyst consists of a chamber 2 that comprises an oxychlorination zone superposed on a calcination zone equipped with a pipe for introducing calcination gas and a pipe for injecting oxychlorination gas 73. A mixing box is arranged between the oxychlorination zone and the calcination zone, at least one space 85 for catalyst grains to pass being made between the box and the chamber 2, with the mixing box comprising an inner space 80 surrounded by a gas-tight side wall 84, a gas-permeable bottom 83, and a roof 81 that covers the inner space 80. The pipe 73 for introducing oxychlorination gas empties into the inner space 80. The mixing box comprises means 82 for evacuating gas, whereby these means are arranged between said vertical wall 84 and the roof 81.

Abstract: Process for hydrotreating a heavy hydrocarbon fraction using a system of switchable fixed bed guard zones each containing at least two catalyst beds and in which whenever the catalyst bed that is brought initially into contact with the feed is deactivated and/or clogged during the steps in which the feed passes successively through all the guard zones, the point of introduction of the feed is shifted downstream. The present invention also relates to an installation for implementing this process.

Abstract: The present invention describes a combustion zone for a regenerative catalytic unit for the continuous regeneration of catalyst, said combustion zone having an annular shape and being divided into at least two combustion stages, each stage being divided into a number N of radial sectors, which are substantially equal, the catalyst flowing under gravity from one sector of the first combustion stage to the sector located in vertical alignment with the second combustion stage by means of drop legs, and the movement of the combustion gas being such that the combustion gas passes in succession through all of the sectors of the first combustion stage in any order, then all of the sectors of the second stage in any order.

Abstract: The present invention concerns a device for distributing a polyphase mixture constituted by at least one gas phase and at least one liquid phase, said mixture being in downflow mode passing through at least one bed of solid particles, and said device comprising at least one tray (1) located above a bed of solid particles, a plurality of mixing channels (2) for said liquid and gas phases, a dispersive system (3) of the jet breaker tray type (3) with a controlled porosity provided with flanges (36) over at least a portion of its perimeter, disposed beneath the mixing channels (2) and above the bed of solid particles, said distribution device being characterized in that the dispersive system (3) comprises at least one separating element (32).

Abstract: The present invention concerns a device for distributing a polyphase mixture constituted by at least one gas phase and at least one liquid phase, said mixture being in downflow mode passing through at least one bed of solid particles, and said device comprising at least one tray (1) located above a bed of solid particles, a plurality of mixing channels (2) for the liquid and gas phases, a dispersive system of the jet breaker tray type (3) with holes provided with flanges (36) over at least a portion of its perimeter, disposed beneath the mixing channels (2) and above the bed of solid particles, said distribution device being characterized in that the dispersive system (3) comprises at least two types of holes (34, 35).

Abstract: A filtration device placed upstream of a catalytic bed of a reactor functioning in downflow or upflow mode consists of a plurality of baskets containing filtration particles with a principal dimension (dp), said baskets being supported by a base plate fixed to the walls of the reactor, termed the filtration plate, the assembly of baskets covering at least the central portion of the section of the reactor, and forming a filtration bed with height Hp. Application of said filtration device to processes for hydrotreatment, selective hydrogenation or conversion of residues or hydrocarbon cuts with a boiling point higher than 120° C., preferably higher than 250° C.