Abstract: A process for the production of highly thermally-integrated hydrogen by reforming a hydrocarbon feedstock wherein a stream of air or water, whose temperature is less by at least 200° C. than the combustion temperature inside a burner, is mixed with the effluent that is obtained from said burner, so as to reduce the temperature of this effluent to less than 725° C.; the mixture obtained is used to superheat at least one stream of water vapor and/or hydrocarbon feedstock in gaseous form, whereby said stream that is thus superheated by indirect heat exchange is injected directly into a reforming reactor where it is used as a fuel; and the second heat exchanger and is used to totally evaporate a stream of liquid water and/or hydrocarbon feedstock.

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: The device described in the present invention can trap plugging particles contained in the liquid feed supplying a reactor functioning in gas and liquid co-current down-flow mode using a specific distributor tray comprising a filtration medium. The present device is of particular application to the selective hydrogenation of feeds containing acetylenic and dienic compounds.

Abstract: The invention is aimed at improving valve pinpointing and reading devices by proposing to activate a magnetic detection source allowing measurements regularly-distributed in a circle around an axis at predetermined measurement positions. An exemplary locator comprises a casing (26) provided with a mechanism for detecting and analyzing the magnetic field of the magnetic dipole of the valve. It comprises:—a magnetic detection source (36) able to detect and measure the magnetic field of the magnetic center of the valve at predetermined measurement positions distributed in a circle around an axis (X-X?), linked to—a microprocessor (32) for analyzing the measurements and for generating detection signals.

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 device described in the present invention allows pre-distribution of the gas and liquid feed supplying a reactor functioning in gas and liquid co-current downflow mode to be carried out by means of a pre-distribution plate comprising a filtration medium and an overflow tube in order to regulate the flow of liquid arriving on the distributor plate located downstream of said device. More particularly, the present invention is applicable to the selective hydrogenation treatment of feeds containing acetylenic and dienic compounds.

Abstract: A device for mixing and distributing two gases upstream of the catalytic zone of a reactor by producing a homogeneous mixture and a profile of velocities which are as flat as possible. The device uses a plurality of internal chambers (I) enclosed in an external chamber (II), the external chamber communicating with each of the internal chambers via orifices pierced in the wall of said internal chambers (I) at a well-defined height. The external chamber (II) is provided with a perforated plate placed at a distance H2 from the inlet pipe for said chamber (II). The device is applied to the inlet of an autothermal reactor.

Abstract: The device described in the present invention can trap plugging particles contained in the liquid feed supplying a reactor functioning in gas and liquid co-current down-flow mode using a specific distributor tray comprising a filtration medium. The present device is of particular application to the selective hydrogenation of feeds containing acetylenic and dienic compounds.

Abstract: The present invention describes an exchanger-reactor for carrying out endothermic reactions such as steam reforming oil cuts or alcohols integrating a steam generation bundle which can thereby increase the thermal efficiency.

Abstract: A compact device for mixing fluids in a downflow reactor comprising at least one substantially horizontal gathering device provided with a vertical gathering line intended to receive the fluids, at least one injection device arranged in the gathering line, an annular mixing chamber located downstream from the gathering means in the direction of circulation of the fluids, the mixing chamber comprising an inlet end directly connected to the gathering line and an outlet end for passage of the fluids, and a horizontal predistribution plate comprising at least one chimney, the plate being located downstream from the mixing chamber at a distance d2, in the direction of circulation of the fluids. The reactor is especially useful for exothermic reactions, e.g. hydrotreatment, hydrodesulfurization, hydrodenitrogenation, hydrocracking, hydrogenation and hydrodearomatization reactions.

Abstract: The device described in the present invention can trap plugging particles contained in the liquid feed supplying a reactor functioning in gas and liquid co-current down-flow mode using a specific distributor tray comprising a filtration medium. The present device is of particular application to the selective hydrogenation of feeds containing acetylenic and dienic compounds.

Abstract: The invention relates to a process for producing thermally-integrated hydrogen by reforming a hydrocarbon feedstock, in a reforming reactor, comprising a stage for maintaining the temperature of the effluent that is obtained from the reforming reactor by co-current heat exchange, in a co-current heat exchanger, between the effluent that is obtained from the reforming reactor and the hydrocarbon feedstock that it is desired to reform. The temperature of the synthetic gas exiting the feedstock-effluent exchanger is between 250° C. and 400° C.

Abstract: An enclosure includes at least one packed bed and a mixture supply line for delivering at the bottom of the enclosure a mixture of a liquid with a gas. The enclosure includes a system for separating the liquid phase and the gas phase of the mixture, the system being arranged between the bed and the mixture supply line, and this system including a housing having a flow passage for the degassed liquid and discharge passages for the disengaged gas.

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 invention relates to a start-up process for a unit for producing highly thermally-integrated hydrogen by reforming a hydrocarbon feedstock that comprises a stage a wherein a burner whose purpose is to ensure start-up is supplied with a mixture of hydrocarbon feedstock and air, a stage b wherein a water stream is evaporated by indirect heat exchange with at least one of the hot streams of the process, a stage c wherein the hydrocarbon feedstock to be reformed is evaporated and heated and then introduced in gaseous form in a reforming reactor, and a stage d wherein the start-up burner is shut down, and a burner that is in permanent operation is lit.

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: This invention relates to a chamber in which a chemical reaction is carried out in the presence of catalyst and reagents, comprising at least one catalytic tube (10) into which is placed an internal tube (12) for evacuating the gas that is produced, means for introducing reagents (15) and means for introducing the catalyst (16) that are located in the upper portion of the chamber (1), means for heating the catalytic tube (10) that are arranged in the lower portion of the chamber (1), and in which the catalytic tube (10) comprises, in its upper portion above the catalyst (13), means that promote heat exchange between the reagents and the gas that is produced. The invention also relates to the process that uses this chamber.

Abstract: This invention describes a new device for controlling the radial profile of the temperature of a confined gas stream that is designed to be used as a coolant in an exchanger that is located downstream from said device.

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.

Abstract: An implantable drainage device for draining the cerebro-spinal fluid of a patient, the device including: a drainage valve including a valve member and a valve seat; a control unit suitable for modifying an operating parameter of said valve, at least as a function of a measurement (D) of the fluid flow rate through said valve; an actuator controlled by the control unit, suitable for modifying the operation of said valve as a function of said operating parameter as modified by the control unit; and a mass flowmeter suitable for evaluating said flow rate of fluid through said valve.