Institut Francais Du Pe'trole

Ifp Energies Nouvelles

Institute Francais Du Petrole

Christophe Chau

Denis Uzio

Sylvie Lacombe

Fabienne Le Peltier

Isabelle Prevost

Ronan Le Dred

Thierry Gauthier

Lars Fischer

Renaud Revel

Pierre-Yves Le Goff

Sylvain Miachon

Jean Giraud

Jean-Alain Dalmon

Stephane Morin

Michaeel Sicard

Micka&euml;l Sicard

Stéphane Morin

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 H/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.

Process for dehydrogenation in the presence of a bimetallic or multi-metallic catalyst that has an optimized bimetallicity index and an optimized hydrogen adsorption capacity

The invention relates to a catalyst that comprises a metal M from the group of platinum, at least one promoter Xthat is selected from the group that consists of tin, germanium, and lead, and optionally at least one promoter Xthat is selected from the group that consists of gallium, indium and thallium, a halogenated compound and a porous substrate, in which the atomic ratio X/M and optionally X/M is between 0.3 and 8, the H/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.

Bimetallic or multi-metallic catalyst that has an optimized bimetallicity index and an optimized hydrogen adsorption capacity

Described is a process for the preparation of a supported zeolite membrane that consists of a zeolite/substrate composite layer, whose zeolite phase exhibits a crystallinity of at least 85%, comprising: The molar ratio of the water to the silica in the gel or the solution in stage a) is between 27:1 and 35:1. The crystallization time of stage c) is at least 25 hours. Said process is particularly suited for the preparation of zeolite membranes whose zeolite phase is of the MFI-structural type.

Process for making supported thin zeolite membrane

A porous inorganic membrane comprises at least one inorganic phase having separating properties. Said membrane has a carbon content representing 0.05% to 25% by weight with respect to the mass of said inorganic phase and is selective to non-condensable gases. It is obtained by means of a selectivation treatment of a porous carbon-free inorganic membrane using a hydrocarbon feed. It is used in processes for separating non-condensable molecules such as hydrogen, and in association with a catalyst in a catalytic membrane reactor.

Porous inorganic membrane containing carbon; a process for its preparation; and use thereof

A process for selective hydrogenation of polyunsaturated compounds that are contained in a hydrocarbon feedstock in the presence of a catalytic reactor with a hydrogen-selective membrane comprises a) the introduction of said feedstock co-mixed with a first amount hydrogen into a reaction zone of said reactor, b) the contact of a second amount hydrogen with the upstream face of the membrane, which is inorganic and porous, then c) the catalytic reaction of the feedstock with hydrogen that has selectively traversed the membrane.

Process for selective hydrogenation using a catalytic reactor with a hydrogen-selective membrane

In order to recover hydrogen from a hydrogen-rich gaseous effluent, a procedure is used that comprises:

Process for recovering hydrogen in a gaseous hydrocarbon effluent using a membrane reactor

Described is a supported zeolite membrane that consists of a zeolite/substrate composite layer that exhibits, in the n-butane/isobutane separation, a permeance of n-butane of at least 6.10 mol/m .s.Pa and a selectivity of at least 250 at the temperature of 180&deg; C. Said zeolite/substrate composite layer is thin and continuous. This membrane is used in processes for gas separation, vapor separation and liquid separation.

Thin zeolite membrane, its preparation and its use in separation

A process is described for preparing a supported zeolite membrane constituted by a composite continuous zeolite/support layer of controlled thickness, wherein the zeolitic phase is principally localized in the pores of a porous support and optionally on the external surface thereof, the process comprising at least the formation of a precursor gel of the zeolite, bringing the gel into contact with the support and crystallizing the zeolite. The zeolite is crystallized by carrying out a thermal program comprising at least three steps in succession: a first constant temperature stage carried out at a temperature in the range 50&deg; C. to 300&deg; C., cooling to a temperature of strictly less than 50&deg; C. followed by a second constant temperature stage carried out at a temperature range of 50&deg; C. to 300&deg; C. The prepared membrane is used in particular in processes for separating gas or separating liquids.

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Rueil Malmaison, France

Christophe Chau