摘要:
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 H.sub.2 O/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.degree. 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.
摘要翻译:本发明涉及用于再生催化剂的方法和单元,所述催化剂用于生产芳族化合物,特别是重整催化剂在移动床中,包括燃烧,氧氯化和煅烧步骤,其中至少一种氯化剂,至少一种 将含氧气体和水引入到氧氯化步骤中,使得H 2 O / HCl摩尔比为1至50,氧氯化步骤在含有小于21%氧气和至少50%的氧氯化气体存在下进行 氯化氢(基于HCl),并且在350-600℃的温度下,并且其中燃烧步骤在至少两个燃烧区域中进行,每个区域与相邻区域分离,并且在 将至少一个带有氧气的气体引入每个区域,所产生的气体从每个区域提取,并且其中操作条件的严重性在催化剂流动方向上增加。
摘要:
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.
摘要翻译:本发明涉及用于再生催化剂的方法和单元,所述催化剂用于生产芳族化合物,特别是重整催化剂在移动床中,包括燃烧,氧氯化和煅烧步骤,其中至少一种氯化剂,至少一种 将含氧气体和水引入到氧氯化步骤中,使得H 2 O / HCl摩尔比为1至50,氧氯化步骤在含有小于21%氧气和至少50%的氧氯化气体存在下进行 ppm(基于HCl),并且在350-600℃的温度下,并且其中燃烧步骤在至少两个燃烧区域中进行,每个区域与相邻区域分离,并且在 将至少一个带有氧气的气体引入每个区域,所产生的气体从每个区域提取,并且其中操作条件的严重性在催化剂流动方向上增加。
摘要:
The invention concerns a process for moving bed regeneration of a reforming or aromatic hydrocarbon production catalyst. The catalyst includes a support, at least one noble metal and at least one halogen. The process includes a combustion step in which the catalyst is treated in at least two successive combustion zones. Also, the process includes each combustion zone separated from adjacent combustion zones allowing catalyst to pass and preventing passage of gas, at least one oxygen-containing gas introduced into each zone and produced gases extracted from each zone, and the severity of the operating conditions in each zone increasing in the direction of catalyst flow. Advantageously, the combustion step ends in a zone for monitoring and controlling combustion completion characterized by a low or zero oxygen consumption.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
Methods for treating a gas mixture of at least propylene and propane, in order to separate the propylene from the propane. The gas mixture is brought into contact with a membrane enables the selective permeation of the propylene with respect to the propane. A propylene-enriched permeate and a propane-enriched retentate is formed. The propylene concentration of the permeate in the membrane is then reduced with a sweeping gas.
摘要:
Methods for treating a gas mixture of at least propylene and propane, in order to separate the propylene from the propane. The gas mixture is brought into contact with a membrane enables the selective permeation of the propylene with respect to the propane. A propylene-enriched permeate and a propane-enriched retentate is formed. The propylene concentration of the permeate in the membrane is then reduced with a sweeping gas.