Abstract: A vessel for regenerating used catalyst comprising at least one combustion zone provided with at least two walls (5a, 5b) between which the catalyst circulates as a moving bed, and provided with at least one conduit (4) for introducing at least one oxygen-containing gas entering the moving bed via one of the walls and leaving via another wall, characterized in that it also comprises a zone (FC) for monitoring and controlling the end of combustion located after the end of the flame front of the last combustion zone (Z2), provided with a conduit (11) for introducing an oxygen-containing monitoring and control gas and at least one means for measuring the temperature and/or the oxygen content in the gas and/or the catalyst leaving the monitoring and control zone. A separator (29) is located between the monitoring and control zone and the last combustion zone for preventing the passage of gas while allowing for the passage of the catalyst.

Abstract: The invention relates to a process for the production of aromatic compounds from a hydrocarbon fraction with a catalyst that preferably circulates in a moving bed, a process that comprises at least the following successive stages that take place in at least one zone: treatment of the fraction in the presence of hydrogen and implementing at least one reaction for dehydrogenation of naphthenes; separation of the gas effluent that contains hydrogen, the liquid product and the catalyst; regeneration of the catalyst; reduction of the catalyst; and reintroduction of the catalyst for the treatment stage; recycling in the treatment stage of at least a portion of the gas effluent that contains the hydrogen that is called recycling gas; process in which the reduction stage is carried out in the presence of recycling gas that is introduced in an amount such that the amount of pure hydrogen that is provided is between 1-10 kg/kg of catalyst, whereby the effluent that is obtained from the reduction is then separated from

Abstract: A moving bed process for producing aromatic compounds comprises at least a first step in which principally naphthene dehydrogenation is carried out in the presence of hydrogen in a mole ratio (H2)1/(HC), said step being followed by at least one subsequent step carried out at a mole ratio (H2)2/(HC)2, the process also comprising reducing the catalyst with hydrogen in a ratio (H2)red/(HC). In accordance with the invention, (H2)1/(HC)+(H2)red/(HC)≦(H2)2/(HC)2, (HC) representing the molar quantity of feed in the first step and (HC)2 that of the subsequent step, or (H2)1/(HC)+(H2)red/(HC)>(H2)2/(HC)2, but where (H2)1/(HC) is less than (H2)2/(HC)2. Particular application to reforming.

Abstract: An apparatus for regeneration a reforming or aromatic compound production catalyst comprises a first combustion zone wherein the first combustion zone receives catalyst and an oxygen-containing gas; a successive second combustion zone; and a conduit communicating the first and second combustion zones for transferring catalysts from the first combustion zone to the second combustion zone. The first combustion zone is isolated from the second combustion zone to prevent passage of oxygen-containing gas from the first combustion zone to the second combustion zone and the severity of the operating conditions increases from the first combustion zone to the second combustion zone.

Abstract: The invention relates to a process for the production of aromatic compounds from a hydrocarbon fraction with a catalyst the preferably circulates in a moving bed. In the process, a hydrocarbon feedstock that is treated by a hydrogen-rich gas is transformed. In a particular embodiment, regenerative reforming is conducted, such as for production of BTX (butene, toluene, xylenes) with continuous regeneration of the catalyst. The invention also pertains to the related device for carrying out the process.

Abstract: A moving bed process for producing aromatic compounds comprises at least a first step in which principally naphthene dehydrogenation is carried out in the presence of hydrogen in a mole ratio (H2)1/(HC), said step being followed by at least one subsequent step carried out at a mole ratio (H2)2/(HC)2, the process also comprising reducing the catalyst with hydrogen in a ratio (H2)red/(HC). In accordance with the invention, (H2)1/(HC)+(H2)red/(HC)≦(H2)2/(HC)2, (HC) representing the molar quantity of feed in the first step and (HC)2 that of the subsequent step, or (H2)1/(HC)+(H2)red/(HC)>(H2)2/HC2, but where (H2)1/(HC) is less than (H2)2/(HC)2. Particular application to reforming.

Abstract: The invention concerns a process for regenerating a catalyst in a fixed bed, for example a catalyst for reforming or for aromatic compound production, including a step for monitoring and controlling combustion completion which is carried out after the catalyst has undergone all of the combustion steps of the process. The monitoring and control step is carried out by injecting an oxygen-containing gas into the zone where monitoring and control takes place, the monitoring and control step being carried out under conditions which are more severe than those in the combustion steps. The monitoring and control step is carried out with an oxygen consumption of less than 10%. The temperature advantageously remains substantially constant.

Abstract: The invention concerns a process for regenerating a catalyst in a fixed or moving bed, for example a catalyst for reforming or for aromatic compound production, including a step for monitoring and controlling combustion completion which is carried out after the catalyst has undergone all of the combustion steps of the process. The monitoring and control step is carried out by injecting an oxygen-containing gas into the zone where monitoring and control takes place, the monitoring and control step being carried out under conditions which are more severe than those in the combustion steps. The monitoring and control step is carried out with an oxygen consumption of less than 10%. The temperature advantageously remains substantially constant. The vessel for carrying out the invention is also claimed.

Abstract: The invention relates to a process for the production of aromatic compounds from a hydrocarbon fraction with a catalyst the preferably circulates in a moving bed. In the process, a hydrocarbon feedstock that is treated by a hydrogen-rich gas is transformed. In a particular embodiment, regenerative reforming is conducted, such as for production of BTX (butene, toluene, xylenes) with continuous regeneration of the catalyst. The invention also pertains to the related device for carrying out the process.

Abstract: The invention concerns a process and unit for regenerating a catalyst for the production of aromatic compounds, in particular for reforming, the catalyst being in a moving bed, comprising combustion, oxychlorination and calcining steps, in which at least one chlorinating agent, at least one oxygen-containing gas, and water are introduced into the oxychlorination step such that the H2O/HCl molar ratio is 1 to 50, the oxychlorination step being carried out in the presence of an oxychlorination gas containing less than 21% of oxygen and at least 50 ppm by weight of chlorine (based on HCl), and at a temperature of 350-600° C., and in which the combustion step is carried out in at least two combustion zones, each zone being separated from the adjacent zones, and at least one gas charged with oxygen is introduced into each zone, the gases produced being extracted from each zone, and in which the severity of the operating conditions increases in the direction of flow of the catalyst.

Abstract: The invention concerns a process for regenerating a catalyst in a fixed or moving bed, for example a catalyst for reforming or for aromatic compound production, including a step for monitoring and controlling combustion completion which is carried out after the catalyst has undergone all of the combustion steps of the process. The monitoring and control step is carried out by injecting an oxygen-containing gas into the zone where monitoring and control takes place, the monitoring and control step being carried out under conditions which are more severe than those in the combustion steps. The monitoring and control step is carried out with an oxygen consumption of less than 10%. The temperature advantageously remains substantially constant. The vessel for carrying out the invention is also claimed.

Abstract: Process for regeneration of a catalytic moving bed in which the catalyst successively passes through at least one combustion zone A, at least one halogenation zone B, and at least one calcination zone C, whereby this process operates in a partial-regeneration-mode, the partially coked catalyst that is obtained from the last combustion zone passes into the halogenation zone in which the amount of halogen and the amount of oxygen are essentially zero--the valves of tubes (19) and (20) are then virtually closed--and the catalyst then passes through the calcination zone in which the amount of oxygen is essentially zero--the valve of tube (11) is then virtually closed.