摘要:
Method for preparation of an adsorbent that comprises successive shaping stages by co-granulation of a faujasite-type zeolite powder A, with a powder B that consists of alumina, whereby the ratio per unit of mass of the powder A in the mixture of powders A and B is between 10 and 70%, for treatment under water vapor and drying.The invention also relates to a process for adsorption of organic contaminants that contain at least one heteroatom and that are present in an olefinic feedstock that comprises at least 50% by volume of hydrocarbons, whereby this process comprises the stage for bringing the olefinic feedstock into contact with the adsorbent that is obtained by the preparation method according to the invention.
摘要:
Method for preparation of an adsorbent that comprises successive shaping stages by co-granulation of a faujasite-type zeolite powder A, with a powder B that consists of alumina, whereby the ratio per unit of mass of the powder A in the mixture of powders A and B is between 10 and 70%, for treatment under water vapor and drying.The invention also relates to a process for adsorption of organic contaminants that contain at least one heteroatom and that are present in an olefinic feedstock that comprises at least 50% by volume of hydrocarbons, whereby this process comprises the stage for bringing the olefinic feedstock into contact with the adsorbent that is obtained by the preparation method according to the invention.
摘要:
The invention is concerned with the use of a TiO2-based composition for capturing halogenated compounds contained in a gaseous mixture, said composition comprising between 10 wt. % and 100 wt. % of TiO2 and between 1 wt. % and 30 wt. % of at least one sulfate of an alkaline-earth metal selected from calcium, barium, strontium and magnesium.
摘要:
The invention concerns a process for purification by elimination of chlorine in the form of hydrogen chloride and organochlorine compounds by contacting in the presence of hydrogen of at least a part of the effluent from a reforming, aromatics production, dehydrogenation, isomerisation or hydrogenation zone, said part of the effluent comprising olefins, hydrogen chloride and organochlorine compounds, on an elimination zone comprising a chain arrangement of two masses, the first mass being a mass comprising at least one metal from group VIII deposited on a mineral carrier and the second mass being a hydrogen chloride adsorbent.
摘要:
The invention is concerned with the use of a TiO2-based composition for capturing halogenated compounds contained in a gaseous mixture, said composition comprising between 10 wt. % and 100 wt. % of TiO2 and between 1 wt. % and 30 wt. % of at least one sulfate of an alkaline-earth metal selected from calcium, barium, strontium and magnesium.
摘要:
A non-homogeneous adsorbent is described, formed of a core and at least one continuous outer layer in which the core of said adsorbent has a volume adsorptive capacity representing at least 35% of the volume of the adsorbent and the outer layer has a diffusional selectivity greater than 5. The adsorbent is used in gas-separation processes or liquid-separation processes.
摘要:
Process for activating a Fischer-Tropsch synthesis catalyst that comprises at least two stages: at least one stage for activation in the presence of hydrogen, or a mixture of hydrogen and an inert gas, and at least one stage for activation in the presence of carbon monoxide or a mixture of carbon monoxide and an inert gas, and optionally a third activation stage that is carried out either in the presence of hydrogen or a mixture of hydrogen and an inert gas, or in the presence of carbon monoxide or a mixture of carbon monoxide and an inert gas.
摘要:
The invention relates to a process for testing performance levels and/or changes over time of at least one catalyst CAT for a fixed-bed reactor comprising at least the following stages: A device for a CT test, comprising at least one hollow metal cartridge MC that contains in particular the catalyst CAT, is connected at a point A of an industrial chemical installation that uses a reaction feedstock that is suitable for testing the catalyst CAT, At point A, a liquid stream that consists of a fraction that is less than or equal to 1% of the preheated reagents circulating in the industrial chemical installation that is circulated in the cartridge MC through the catalyst CAT is sampled at a reaction temperature for a period T, At least a fraction of the effluent of the cartridge MC is sampled for chemical analysis, Optionally, the device for the CT test of the industrial chemical installation is isolated without stopping its operation, and at least a fraction of the catalyst CAT is sampled for physical and/or chemical analysis. The invention also relates to an industrial chemical installation that comprises the device for the CT bypass test.
摘要:
The invention concerns a method for capturing a chemical compound, typically an impurity, and for accumulating said chemical compound on a capture mass CAPT included in at least one removable adsorbant cartridge MC over a long period exceeding 2 days, with a view to the external chemical analysis thereof.The invention also concerns an apparatus ST suitable for capturing at least one chemical compound in a fluid flow for its detection and/or quantification comprising, downstream of said cartridge or cartridges, at least one means for measuring the cumulative flow which has traversed said cartridge or cartridges over a set time period. In a preferred variation of the invention, the capture mass CAPT is fragmented into a plurality of elementary masses CAPTi which allowing the spread of an irreversible adsorption front or the displacement of a chromatographic zone to be determined.
摘要:
For producing a gasoline stock with a high octane number, employed are at least one hydroisomerisation section and at least one section for adsorptively separating multibranched paraffins contained in a constituted by a C5 to C8 cut. The separation section contains at least one zeloitic adsorbent with a mixed structure with principal channels with openings defined by a ring containing 10 oxygen atoms and secondary channels with openings by a ring of at least 12 oxygen atoms, the secondary channels only being accessible to the feed to be separated via the principal channels.