Institut Francais Du Pe'trole

Other

Université De Nantes

Daniel Durand

Philippe Courty

Gil Mabilon

Alain Forestiere

Patrick Chaumette

Christine Travers

Michel Prigent

Isabelle Guibard

Alain Foucault

François Couillard

Jean Cosyns

Gerard Hillion

Pierre Grandvallet

Nicolas Des Courtils

Jean-Francois Le Page

Andre Sugier

Patrick Sarrazin

Quang Dang Vu

Gerard Leger

Edouard Freund

Dang V Quang

Catherine Verdon

Jack Legrand

Christian Lassau

Francis A L Dullien

Richard Doziere

Michel Davidson

Luc Marchal

Patrice Marecot

Lucien Sajus

Adrien Orieux

Serge Mouratoff

Jean Favennec

Paul Mouchot

Céline Diab

Aurélie Diab

Barbara Evrard

Jacques Barbier

The invention relates to a method for separating constituents of a liquid feed by liquid-liquid centrifugal chromatography and to a device for implementing it. Constituents (A, B) having different partition coefficients such that they are respectively carried along at unequal velocities by a light solvent (l) and a heavier solvent (L), the feed is continuously injected at an intermediate point of a separation column (col), successive cycles comprising alternately a heavy solvent injection stage and a light solvent injection stage are carried out respectively at the two ends of the column consisting of the interconnection in series of at least one set of separation cells, and the separated solvents (FA, FB) are collected during each one of said stages at the column ends opposite the solvent injection points.

Method and device for separating constituents of a liquid feed by liquid-liquid centrifugal chromatography

Method for sizing the cells of a centrifugal liquid-liquid chromatography 'column' (CPC column) consisting of stacked discs on which the cells connected in cascade (in series) by small channels are engraved. Rotation of the stack creates a high centrifugal acceleration field which makes it possible to keep a liquid phase referred to as stationary phase motionless, whereas a mobile phase circulates along the CPC column. The cells are three-dimensional, with two dimensions (L, l) of the cells oriented in a plane substantially normal to the axis of rotation (&#x3a9;) of the disc and a third dimension (e) oriented in a direction substantially parallel to the axis of rotation, and selected so as to be at least equal to one of the other two dimensions (L, l), thus providing higher efficiency. When the scale of the devices has to be changed, the size of the cells is modified ensuring that, in any case, this third dimension (e) is favored so as to be as great as possible. Applications: design of analytic or preparative chromatography devices.

Method for optimally sizing cells of a centrifugal partition chromatography device

The invention relates to a method for separating constituents of a liquid feed by liquid-liquid centrifugal chromatography and to a device for implementing it. Constituents (A, B) having different partition coefficients such that they are respectively carried along at unequal velocities by a light solvent () and a heavier solvent (L), the feed is continuously injected at an intermediate point of a separation column (col), successive cycles comprising alternately a heavy solvent injection stage and a light solvent injection stage are carried out respectively at the two ends of the column consisting of the interconnection in series of at least one set of separation cells, and the separated solvents (FA, FB) are collected during each one of said stages at the column ends opposite the solvent injection points.

Method and device for separating constituents of a liquid charge by means of liquid-liquid centrifuge chromatography

The present invention relates to a catalyst support comprising a monolithic body () with a first network of channels (). According to the invention, the support comprises at least an additional network of channels () in an arrangement whereby channels () of the networks intersect one another.

Catalyst support with intersecting channel network, catalysis reactor comprising same and method for making same

A method and system is intended for fine proportioning of fluids injected into a pumping installation, e.g., a liquid chromatography installation, allowing to compensate for non-return valve errors. The system includes a fluid delivery system including vessels for constituents (A, B, X) that communicate with a pumping unit () by means of a one-way valve () that opens upon suction, and a control unit (PC) that adjusts the respective proportions of the various fluids sucked by acting on the opening time of solenoid valves (EVto Even) associated with the various vessels. As the opening and closing times of the one-way valve are most often unequal in practice, control unit (PC) is suited to cyclically change the order of the control signals applied to the various solenoid valves during the various successive suction stages of each pumping unit so as to compensate on average for the proportioning inequalities due to each one-way valve.

Method and system intended for fine proportioning of fluids injected into a pumping installation with check valve proportioning compensation

The invention involves the production of a catalyst that contains (1) at least one refractory inorganic oxide support, (2) at least one iron oxide, and (3) at least one cerium oxide, (4) at least one metal A, for example, from Groups VIB, VIIB, VIII, and IB of the Periodic System and, optionally (5) at least one compound of metal B, for example, from Groups IA, IIA, the rare-earths group, and Group IVB of the Periodic System, deposited in the form of a porous layer ('washcoat') on a ceramic or metal substrate:

Process for preparing a catalyst suitable for the treatment of exhaust

A catalyst which is active and selective for the reduction of nitrogen oxides to molecular nitrogen by reducing agents in a medium which is superstoichiometric in oxidizing agents such as carbon monoxide, hydrogen, hydrocarbons, alcohols and other oxygen-containing organic compounds. The active phase of this catalyst is as follows:

Catalysts selective for the reduction of nitrogen oxides to nitrogen in

Described is catalyst that is active and selective for reducing to molecular nitrous oxides contained in a superstoichiometric medium of oxidizing agents, said reduction being conducted with agents such as carbon monoxide, hydrogen, hydrocarbons, alcohols, ethers, and other oxidized organic compounds and also with ordinary fuels such as gasolines, gas oils, liquefied gases, and compressed natural gases, whereby said catalyst comprises:

Catalysts for reducing nitrogen oxides to molecular nitrogen in a

A production process for supported catalysts is described comprising:

Production process for catalysts on supports including a centrifuging

Method of preparation of a hydrogenation catalyst soluble in an organic

A catalyst for the treatment of exhaust gases from an internal combustion engine comprises a support including a porous layer which latter includes at least one inorganic refractory oxide and an active phase containing at least cerium, iron and platinum, characterized in that said porous layer comprises at least the following percentages by weight

Catalyst for treatment of exhaust gases from an internal combustion

Method for preparing multi-metal catalysts

Exhaust manifold for catalytic treatment of the exhaust gases of an internal-combustion engine comprising a metallic outer tube (1) including a catalyst layer (4) in direct contact with the exhaust gases. According to the invention, the manifold also comprises at least one inner tubular element (2), substantially coaxial to said outer tube (1) and providing with the latter at least one space (3), the inner surface of said inner tube (2) being coated by said catalyst layer (4).

Exhaust manifold with catalytic wall for internal-combustion engines

The invention concerns a multifunctional catalyst containing cerium, uranium and at least one metal, for converting pollutants emitted by internal combustion engines, and their preparation. A catalyst comprises a porous layer containing

Multifunctional catalysts containing cerium, uranium and at least one

The invention relates to a process for the production of hydrogen by steam reforming of methanol, in which water and methanol are reacted (4), under relatively high pressure, over a suitable catalyst. The gases emitted from the reaction are contacted (10), after condensation (7) under relatively high pressure, with an adsorption agent, such that the byproducts of the reaction are adsorbed and a hydrogen-rich gas is liberated (11). Also, byproducts which are recycled to the steam reforming reactor (4), are periodically desorbed under relatively low pressure at along with a fraction of the hydrogen present in the adsorption zone (10), after being submitted to recompression (13) and removal (14), under relatively high pressure, of at least a portion of carbon the dioxide, the desorbed gas fraction is recycled to the steam reforming reactor.

Process for the production of high purity hydrogen by catalytic

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Rueil Malmaison, France

Daniel Durand