摘要:
The invention concerns a homogeneous bed of particles of a catalyst, said catalyst comprising at least one amorphous matrix, at least one noble metal, at least one additional metal M and at least one halogen, and in which, for a catalyst particle, CPt is the local concentration of noble metal Pt; CM is the local concentration of additional metal M; CX is the local concentration of halogen; said catalyst being in the form of a homogeneous bed of particles, in which across the diameter of the particle, at least 70% of the values CPt/CM or CPt/CX differ from the mean local ratio by at most 30%, and in which the mole ratio M/Pt in the catalyst is in the range 1.8 to 6.
摘要:
The invention relates to a process for dehydrogenation of a hydrocarbon feedstock in the presence of a catalyst that comprises a noble metal M that is selected from the group that consists of platinum, palladium, rhodium, and iridium, at least one promoter X1 that is selected from the group that consists of tin, germanium, and lead, and optionally a promoter X2 that is selected from the group that consists of gallium, indium and thallium, an alkaline or alkaline-earth compound and a porous substrate, in which the atomic ratio X1/M and optionally X2/M is between 0.3 and 8, the Hir/M ratio that is measured by hydrogen adsorption is greater than 0.40, and the bimetallicity index BMI that is measured by hydrogen/oxygen titration is greater than 108.
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 relates to a catalyst that comprises a metal M from the group of platinum, at least one promoter X1 that is selected from the group that consists of tin, germanium, and lead, and optionally at least one promoter X2 that is selected from the group that consists of gallium, indium and thallium, a halogenated compound and a porous substrate, in which the atomic ratio X1/M and optionally X2/M is between 0.3 and 8, the Hir/M ratio that is measured by hydrogen adsorption is greater than 0.40, and the bimetallicity index BMI that is measured by hydrogen/oxygen titration is greater than 108. The invention also relates to the process for the preparation of this catalyst and a reforming process using said catalyst.
摘要:
Disclosed are reactions for the aromatization of hydrocarbons containing 2 to 9 carbon atoms per molecule, with a composite catalyst containing:an MFI zeolite in hydrogen form, the framework containing at least one of the elements silicon, aluminum and/or gallium; a matrix; gallium; at least one noble metal of the platinum family, at least one additional metal selected from the group made up of tin, germanium, indium, copper, iron, molybdenum, gallium, thallium, gold, silver, ruthenium, chromium, tungsten and lead, and possibly a compound selected from the group made up of alkali and alkaline earth metals.
摘要:
Process for the production of high-quality kerosene and diesel fuels and for the coproduction of hydrogen from a so-called light naphtha cut to which any quantity of LPG cut can be added where the steps of the process include: separating normal and iso-paraffins, dehydrogenation of the paraffins, oligomerization of the olefins and hydrogenation of the oligomerized olefins, the process permitting the production of kerosene and diesel fuels meeting market specifications, or even improved relative to the latter.
摘要:
A method and apparatus 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 adsorbent cartridge MC over a period exceeding 2 days, with a view to the external chemical analysis thereof. The apparatus ST suitable for capturing at least one chemical compound in a fluid flow for its detection and/or quantification comprise, downstream of said cartridge or cartridges, at least one device for measuring the cumulative flow which has traversed the 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 allows for the spread of an irreversible adsorption front or the displacement of a chromatographic zone.
摘要:
For testing performance levels and/ or changes over time of at least one catalyst (CAT) for a fixed-bed reactor: a device (CT) for a test, comprising at least one hollow metal cartridge (MC) containing the catalyst (CAT) is connected at a point A of an industrial chemical installation containing a reaction feedstock suitable for testing the catalyst (CAT); a liquid stream containing a fraction that is less than or equal to 1% of preheated reagents circulating in the industrial chemical installation is circulated in the cartridge (MC) through the catalyst (CAT) and sampled at a reaction temperature for a period (T), and returned to the industrial chemical installation at point B downstream of the device.
摘要:
The invention relates to a catalyst that comprises a metal M from the group of platinum, at least one promoter X1 that is selected from the group that consists of tin, germanium, and lead, and optionally at least one promoter X2 that is selected from the group that consists of gallium, indium and thallium, a halogenated compound and a porous substrate, in which the atomic ratio X1/M and optionally X2/M is between 0.3 and 8, the Hir/M ratio that is measured by hydrogen adsorption is greater than 0.40, and the bimetallicity index BMI that is measured by hydrogen/oxygen titration is greater than 108. The invention also relates to the process for the preparation of this catalyst and a reforming process using said catalyst.
摘要:
The invention concerns the production of a substituted or unsubstituted aniline by selective hydrogenation of the corresponding nitroaromatic compound. It is characterized by the use of a catalyst based on a metal selected from rhodium and ruthenium and based on a metal selected from the group comprising tin, germanium and lead.