Abstract:
The present invention is directed to a process for the removal of aromatic hydrocarbons from a lean acid gas containing less than 20 mol.% of H2S, comprising : a) contacting the lean acid gas stream (1) with a H
Abstract:
The invention is a process for removing sulfur from a gas containing sulfur compounds as H2S, SO2, COS, CS2..., in a quantity of up to 15%wt; it particularly concerns gases emanating from the Claus process. The process comprises a first hydrogenation of the sulfur compounds into H2S, the hydrogenation gas being used to regenerate a deactivated bed of oxidation catalyst, both being carried out at 200-500° C. After sulfur removal, the resulting gas undergoes a second hydrogenation step and then a direct oxidation step, said step being operated under the dew point of sulfur to trap the formed sulfur in the catalyst. In the further cycle, the gas streams are switched so as to regenerate the catalyst in run which is deactivated. In a preferred embodiment, the process operates in at least 2 identical reactors, each containing a bed of hydrogenation catalyst followed (in the sense of the flow of gas) by a direct oxidation catalyst bed containing an embedded heat exchanger.
Abstract:
L'invention concerne un procédé flexible pour la purification d'un solvant inhibiteur de la formation d'hydrates lors du traitement de gaz, en particulier de monoéthylène glycol (MEG), ledit solvant ayant un point d'ébullition supérieur à celui de l'eau et étant, à un moment au moins, en mélange avec de l'eau et des sels, le procédé opérant différemment avec la même installation selon la teneur en sels du MEG à traiter. Le procédé opère selon une phase dite de reclaiming (séparation des sels sous vide suivie de distillation sous vide) lorsque la teneur en sels dépasse le seuil de précipitation et sinon le procédé opère en phase de régénération (absence de séparation de sels et pas de fonctionnement sous vide). Avantageusement, le basculement a lieu sous asservissement à un moyen de dosage des sels.
Abstract:
Procédé de régénération d'une solution de glycol contenant de l'eau, des hydrocarbures et des sels dissous, comportant les étapes qui consistent à détendre la solution pour libérer des hydrocarbures et pour obtenir une solution pauvre en hydrocarbures, et à distiller dans une colonne de distillation la solution pauvre en hydrocarbures obtenue à l'étape précédente pour obtenir une solution enrichie en glycol et une vapeur contenant de l'eau et des hydrocarbures. Puis, à mettre sous vide une première partie de la solution enrichie en glycol obtenue à l'étape précédente sous une pression inférieure à 90 000 Pa absolu pour obtenir de l'eau vaporisée et une solution de glycol contenant des sels précipités, et â séparer les sels précipités de la solution de glycol obtenue à l'étape précédente pour obtenir des sels précipités et une solution de glycol appauvrie en sels.
Abstract:
The invention is a process for removing sulfur from a gas containing sulfur compounds as H2S, SO2, COS, CS2..., in a quantity of up to 15%wt; it particularly concerns gases emanating from the Claus process. The process comprises a first hydrogenation of the sulfur compounds into H2S, the hydrogenation gas being used to regenerate a deactivated bed of oxidation catalyst, both being carried out at 200-500°C. After sulfur removal, the resulting gas undergoes a second hydrogenation step and then a direct oxidation step, said step being operated under the dew point of sulfur to trap the formed sulfur in the catalyst. In the further cycle, the gas streams are switched so as to regenerate the catalyst in run which is deactivated. In a preferred embodiment, the process operates in at least 2 identical reactors, each containing a bed of hydrogenation catalyst followed (in the sense of the flow of gas) by a direct oxidation catalyst bed containing an embedded heat exchanger.
Abstract:
The invention is a process for removing sulfur from a gas containing sulfur compounds as H2S, SO2, COS, CS2..., in a quantity of up to 15%wt; it particularly concerns gases emanating from the Claus process. The process comprises a first hydrogenation of the sulfur compounds into H2S, the hydrogenation gas being used to regenerate a deactivated bed of oxidation catalyst, both being carried out at 200-500°C. After sulfur removal, the resulting gas undergoes a second hydrogenation step and then a direct oxidation step, said step being operated under the dew point of sulfur to trap the formed sulfur in the catalyst. In the further cycle, the gas streams are switched so as to regenerate the catalyst in run which is deactivated. In a preferred embodiment, the process operates in at least 2 identical reactors, each containing a bed of hydrogenation catalyst followed (in the sense of the flow of gas) by a direct oxidation catalyst bed containing an embedded heat exchanger.
Abstract:
The invention concerns a separator for three-phase mixture such as a liquid-liquid-gas mixture to be used under the sea, particularly for separating the constituents of an oil/water/gas mixture, comprising a chamber (1) provided with intake means (2; 14, 15, 16, 17, 18, 19) for the three-phase mixture, first discharge means (3; 9, 10) and second discharge means (4), and a coalescing device comprising two sub-assemblies (5, 11; 7, 12) of sloping plates (6; 8). The invention is characterised in that the first discharge means (9, 10) consist of a barrier-plate (9) substantially perpendicular to the plates of said sub-assemblies (11, 12) and extending from the chamber lower wall (26) up to a height (h2) greater than the height (h1) of the plates of said sub-assemblies (11, 12), and of a discharge orifice (10) located on the barrier-plate (9) side opposite to the one where the sub-assemblies (11, 12) are located.
Abstract:
The present invention relates to a column for heat and/or mass exchange between a gas and a liquid. The column comprises at least one collection tray (1), at least one packed bed, and means for mixing a gas flow (7, 8). According to the invention, the means for mixing a gas flow are positioned underneath the collection tray (1) and above the packing.