Institut Francais Du Pe'trole

Ifp Energies Nouvelles

Institute Francais Du Petrole

Elsa Jolimaitre

Paul Broutin

Olivier Ducreux

Dominique Casanave

Arnaud Baudot

Emmanuelle Bracco

Delphine Marti

Jean-François Joly

Jean-Francois Joly

Damien Leinekugel Le Cocq

Christophe Bouchy

Fabrice Giroudiere

Delphine Bazer-Bachi

Laurent Bournay

Renaud Cadours

Joseph Lopez

Luc Wolff

Eszter Toth

Nicolas Boudet

Pascal Mougin

Sophie Drozdz

Gerhard Pirngruber

Loïc Rouleau

Helene Rodeschini

Raphaël Huyghe

Hélène Rodeschini

Fabrice Giroudière

Damien Leinekugel Le Coq

The present invention concerns an adsorbent comprising at least one zeolite selected from a zeolite of the 12 MR, 10 MR and 8 MR type and at least one binder comprising a clay with a Si/Al weight ratio of more than 2. It also concerns its preparation process and its use in a process for purifying a hydrocarbon feed comprising unsaturated molecules and at least one impurity comprising at least one heteroatom of the O, S or N type.

Adsorbent based on a zeolite and a silica-rich clay, and process for purifying hydrocarbon feeds containing unsaturated molecules

The invention relates to a process for purification of olefinic feedstocks using an adsorbent comprising a 12 MR-type zeolite, in which the zeolite content of said adsorbent is between 93% by weight and 100% by weight, and the binder content of said adsorbent is between 0 and 7% by weight, in which said zeolite contains silicon and an element T that is selected from the group that consists of aluminum, boron, gallium and iron, and in which the Si/T atomic ratio is less than 20.

Process for purification of olefinic feedstocks using an adsorbent comprising a 12 MR-type zeolite

The present invention relates to a method of producing hydrogen of very high purity from a feed predominantly containing said hydrogen and a minor part of impurities mainly consisting of carbon dioxide, carbon monoxide, methane and heavier hydrocarbons. The purification method by hydrogen adsorption using a desorption stage at a lower pressure than the pressure of the feed, such as a PSA method for example, allows to produce the desorption stream and notably to recover the carbon dioxide under pressure and high-purity hydrogen, with a high yield. These performances are obtained by combining the successive stages of the method according to the invention with the use of a new family of adsorbent whose dynamic capacity at a high desorption pressure is greater than that of conventional adsorbents.

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The liquid hydrocarbon stream including COS is introduced via lineinto membrane contactor CM to be placed in contact, through membrane M, with the aqueous alkanolamine solution arriving via lineThe COS contained in the hydrocarbon stream is absorbed by the aqueous alkanolamine solution. The liquid hydrocarbons from which the COS has been removed are evacuated from CM via lineThe aqueous solution containing COS is sent via lineto zone R to be regenerated. The compounds released during regeneration, particularly COS and COS-derived products, are evacuated from zone R via lineThe regenerated aqueous alkanolamine solution is recycled via lineinto membrane contactor CM.

Method for eliminating the carbonyl sulfide contained in a liquid hydrocarbon stream

This invention describes a new hydrogen purification process that employs a combination of at least three membrane separation units. This process allows non-stationary operations and is particularly suitable for the production of hydrogen for the purpose of its use in a fuel cell.

Hydrogen purification process that uses a combination of membrane separation units

Process for the production of a RON isomerate that is at least equal to 80 and that contains less than 1% by weight of aromatic compounds and for co-production of an aromatic fraction that for the most part contains toluene, starting from a fraction with 7 carbon atoms containing paraffins, aromatic compounds and naphthenes.

Process for isomerization of a C7 fraction with co-production of an aromatic molecule-rich fraction

Process for the production of a RON isomerate that is at least equal to 80 and that contains less than 1% by weight of aromatic compounds and a fraction that for the most part contains methylcyclohexane (MCH) and optionally toluene, starting from a fraction with 7 carbon atoms.

Process for isomerization of a C7 fraction with co-production of a cyclic molecule-rich fraction

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.

Heterogeneous adsorbent and the use for diffusional separation methods

The invention relates to a method of isomerising a charge comprising hydrocarbons containing between 5 and 8 carbon atoms per molecule. According to the invention, said charge is separated into at least two fractions: fraction A mostly comprising hydrocarbons containing 5 or 6 carbon atoms and fraction B mostly comprising hydrocarbons containing 7 or 8 carbon atoms. Subsequently, said fractions A and B are treated separately under specific conditions in different isomerisation reaction zones.

Method for the isomerisation of a C5-C8 fraction involving two parallel reactors

A process for the production of an isomerate with a RON that is at least equal to 80 and that contains less than 1% by weight of aromatic compounds, starting with a fraction consisting mostly of hydrocarbons with 7 carbon atoms, and containing paraffins, naphthenes, and aromatic compounds in any proportion is described. Said process uses at least one isomerization unit, at least one unit for opening naphthene rings, and at least one separation unit; these units are combined in such a way as to recycle, to exhaustion, methyl cyclohexane, toluene, and normal paraffins and monobranched paraffins.

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.

Process combining hydroisomerisation and separation using a zeolitic adsorbent with a mixed structure for the production of high octane number gasolines

A process for separating multibranched paraffins comprised in a hydrocarbon feed comprising hydrocarbons containing 5 to 8 carbon atoms per molecule comprises a separation unit functioning by adsorption and contains at least one zeolitic adsorbent with a mixed structure with principal channels with openings defined by a ring containing 10 oxygen atoms and secondary channels with openings defined 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. Particular zeolitic adsorbents of the invention are zeolites with structure types EUO, NES and MWW. NU-85 and NU-86 zeolites are also particularly suitable for carrying out the process of the invention.

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Lyons, France

Elsa Jolimaitre