Institut Francais Du Pe'trole

Institute Francais Du Petrole

Institut Francais Du Petrole, Des Carburants Et Lubrifiants Et

Institut Fran.cedilla.ais Du Petrole

Institut Francais Du Petrole and Total Raffinage Distribution

Institut Fracnais Du Petrole

Paul Mikitenko

Massimo Zuliani

Lionel Asselineau

Jean Cosyns

Christine Travers

Charles Cameron

Jean-Luc Nocca

Frederic Morel

Roben Loutaty

Marc Boulet

Jean Claude Company

Stuart R MacPherson

Blaise Didillon

Gerard Paul Hotier

Jean-Charles Viltard

Annick Pucci

Ari Minkkinen

Michel Dorbon

Francoise Montecot

Georges Cohen

Francedillaoise Montecot

Dominique Commereuc

Alain Forestiere

Bernard A Juguin

Sigismond Franckowiak

Bernard Torck

Quentin Debuisschert

Didier Duee

Pierre Marache

Pierre Baumgartner

Jean Charles Viltard

Alaio Convers

Alain Forestière

Catalytic process for metathesis of olefins in the presence of a catalyst and a stabilizing agent that is injected into the reaction medium. Application in particular to rebalancing between one another the light olefins that are obtained from steam cracking or catalytic cracking (FCC), such as ethylene, propylene, butenes or pentenes.

Process for metathesis of olefins in the presence of a stabilizing agent of the catalyst

A process for production of paraxylene from a charge containing C7-C9 aromatic hydrocarbons in which a first fraction is enriched to at least 30% weight with paraxylene and this fraction is purified by at least one high-temperature crystallization in at least one crystallization zone. Said first fraction is crystallized in a crystallization zone at high temperature T and advantageously between &plus;10 and &minus;25&deg; C., crystals in suspension in a mother liquor are recovered, the crystals are separated from the mother liquor in at least a first separation zone, the crystals obtained are partially melted in at least a zone for partial melting and a suspension of crystals is recovered, the crystals in suspension are separated and washed in at least one separation and washing zone and pure paraxylene crystals and washing liquor are recovered, and pure crystals are optionally completely melted and a liquid stream of melted paraxylene is collected.

Process for production of paraxylene comprising a high-temperature crystallization with at least one stage and a partial melting of the crystals

A device for crystallization of a component from a liquid mixture comprising a chamber, a first conduit connected to said chamber for supplying said mixture, a second conduit connected to and in connection with said chamber for introducing cold gas, a third conduit for withdrawing warmed gas from said crystallizer, a turbo-expander for cooling gas withdrawn from said chamber, and a fourth conduit Icading from the turbo-expander to said chamber. The device has particular application for the crystallization of paraxylene.

Device for crystallization by isentropic expansion and its use

Process for eliminating polar compounds on an etherification unit

The invention concerns a petroleum product and a process for the production of a petroleum product which can form part of a blend for an internal combustion engine fuel, the process comprising a) hydrotreating a hydrocarbon feedstock at a partial pressure of hydrogen at the reactor outlet of about 0.5 MPa to about 6 MPa, b) separating a product (P) from step a) into a product (P1) with a final boiling point of about 300.degree. C. and a product (P2) with an initial boiling point greater than the final boiling point of product (P1), c) performing a liquid-liquid extraction with a solvent (S1), to produce an extract (E1) and a raffinate (R1) from product (P2), d) recovering solvent (S1) from raffinate (R1) to produce a product (Q1), depleted in solvent (S1), which has improved qualities and contains less than 500 ppm by weight of sulphur.

Process for the production of an internal combustion engine fuel base by

Device and process for crystallizing a component, e.g. paraxylene, from a mixture that comprises a chamber (1) that has in its upper part means (46) for supplying the mixture, collecting means (20), and in its lower part, crystals of the component in suspension in a mother liquor, connected to means (C) for separation and purification of the crystals that are obtained, means (9) for supplying a cold gaseous fluid and means (22) for drawing off the so-called hot gaseous fluid that results from the direct heat exchange, whereby said device also comprises means for shaping a descending flow of the mixture onto tubes such that the cold gaseous fluid that circulates upward exchanges cold directly with the mixture, whereby means (22) for drawing off the hot gaseous fluid are connected to at least one fluid recompression means (24b), whose output is connected to at least one heat exchanger (27), whereby the heat exchanger is connected to a turbo-expander (30), which is connected to means (31) for supplying cold gaseous fluid.

Process for separating paraxylene comprising at least two

Process for production of paraxylene comprising a high-temperature

The invention concerns a reactive distillation process comprising a distillation zone, associated with a reaction zone which is at least in part internal to said distillation zone and comprises at least one catalytic bed in which the feed is transformed in the presence of a catalyst and at least one gas stream containing hydrogen, characterized in that each catalytic bed in the internal portion of said reaction zone is traversed by said gas stream and liquid in ascending co-current mode. The invention particularly concerns selective hydrogenation processes for light unsaturated hydrocarbons, mainly any olefins and benzene, comprised in a mixture, the major portion of which is constituted by hydrocarbons containing at least five carbon atoms per molecule.

Hydrogenation process comprising a catalytic distillation zone

Process for separating paraxylene comprising at least one

Para-xylene is produced from a paraselective toluene disproportionation reactor, effluent (3) is distilled to eliminate toluene and benzene in at least 2 distillation columns (C1), (C2), and the xylenes (8) are crystallized at least once (10) at between +10.degree. C. and -30.degree. C. The separated mother liquor (14) is adsorbed on a zeolitic sieve in the presence of toluene in a simulated moving bed (15). This latter produces a raffinate (16) containing toluene which is depleted in para-xylene which is distilled in a distillation column (C4), and an extract which is enriched in para-xylene and contains toluene, which is recycled to columns (C1, C2). The para-xylene crystals are purified by washing with toluene and distillation or by partial melting (30) followed by washing with molten high purity para-xylene.

Production of para-xylene from an effluent from paraselective toluene

For the treatment of a feed comprising a major portion of olefinic hydrocarbons containing 4 carbon atoms per molecule, including isobutene, 1-butene and 2-butenes in a ratio which substantially corresponds to the thermodynamic equilibrium, in which the feed is treated in a distillation zone comprising a stripping zone and a rectification zone associated with at least one hydroisomerization reaction zone, the hydroisomerization reaction zone being at least partially internal to the distillation zone and comprising at least one catalytic bed, in which hydroisomerization of at least a portion of 1-butene is carried out in the presence of a hydroisomerization catalyst and at least one gas stream comprising hydrogen, such that an effluent rich in isobutene leaves the distillation zone overhead and an effluent rich in 2-butenes leaves the bottom, the process being characterized in that each catalytic bed in the internal portion of the hydroisomerization zone is traversed by an ascending co-current of the gas stream and liquid and is substantially out of contact with the distillation vapor.

Apparatus comprising a catalytic distillation zone comprising a reaction

A process for treating a feed comprising C.sub.5.sup.+ hydrocarbons and comprising at least one unsaturated C.sub.6.sup.+ compound including benzene, is such that the feed is treated in a distillation zone, associated with a hydrogenation zone, comprising at least one catalytic bed, in which the hydrogenation is carried out of unsaturated C.sub.6.sup.+ compounds contained in the feed, and whereof a charge for the hydrogenation step is removed at the height of a removal level and represents at least part of the liquid flowing in the distillation zone, and the effluent from the hydrogenation reaction zone is at least in part reintroduced into the distillation zone to ensure continuity of the distillation operation, the effluents at the top and bottom on the distillation zone being very depleted of unsaturated C.sub.6.sup.+ compounds. The effluent drawn off from the top of the distillation zone is treated in a zone for the isomerisation of C.sub.5 and/or C.sub.6 paraffins.

Process for the selective reduction to the content of benzene and light

The invention concerns a petroleum product and a process for the production of a petroleum product which can form part of a blend for an internal combustion engine fuel, the process comprising

The invention concerns a reactive distillation apparatus comprising a distillation zone, associated with a reaction zone which is at least in part internal to said distillation zone and comprises at least one catalytic bed in which the feed is transformed in the presence of a catalyst and at least one gas stream containing hydrogen, characterized in that each catalytic bed in the internal portion of said reaction zone is traversed by said gas stream and liquid in ascending co-current mode. The invention also concerns selective hydrogenation processes for light unsaturated hydrocarbons, mainly any olefins and benzene, comprised in a mixture the major portion of which is constituted by hydrocarbons containing at least five carbon atoms per molecule, and the hydroisomerisation of at least a portion of the 1-butene contained in a feed the major portion of which is constituted by olefinic hydrocarbons including isobutene, also 1-butene and 2-butenes in a ratio which substantially corresponds to the thermodynamic equilibrium.

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Noisy le Roy, France

Paul Mikitenko