Ifp Energies Nouvelles

Total Research & Technology Feluy

Total Petrochemicals Research Feluy

Natacha Touchais

Vincent Coupard

Walter Vermeiren

Delphine Minoux

Cindy Adam

Philip De Smedt

Stephanie Fleurier

Nikolai Nesterenko

Emmanuelle Guillon

Frederic Augier

Helene Olivier-Bourbigou

Lionel Magna

Laurent Bournay

Alexandre Vonner

Nicolas Cadran

Thomas Plennevaux

Tiago Sozinho

Helena Gonzalez Penas

Emilie Kobel

Lucien Saussine

Francois Hugues

Annick Pucci

Frederic Feugnet

Hugues Dulot

David Proriol

Hélène Olivier-Bourbigou

Stephane Harry

François Hugues

Frédéric Feugnet

Sandrine Berard

Cedrik Popelin

Stéphanie Fleurier

Stéphane Harry

Philippe De Smedt

Walter Veirmeiren

The invention relates to a process for the oligomerization of ethylene, carried out at a pressure of between 0.1 and 10.0 MPa, at a temperature of between 30 and 200&#xb0; C., in a cascade of N gas/liquid reactors in series, N being at least equal to 2, comprising a step of introducing a catalytic oligomerization system into at least the first reactor of the cascade, a step of bringing said catalytic system and an optional solvent into contact with ethylene by introducing said ethylene into the lower part of the reaction chamber of at least the first reactor of the cascade, for each reactor n, a step of withdrawing a liquid fraction in the lower part of the reaction chamber of the reactor n, the liquid fraction being separated into two streams: a first stream corresponding to a first, 'main', part of the liquid fraction, which is conveyed to a heat exchanger for cooling; a second stream corresponding to the second part of the liquid fraction which constitutes the liquid feedstock of the following reactor n+1 in the cascade, a step of introducing said second part of the liquid phase withdrawn from the reactor n towards the reaction chamber of the following reactor n+1 in the direction of flow, a step of cooling said first part of the liquid fraction withdrawn from the reactor n in step c) by passing said first part of the liquid fraction into a heat exchanger in order to obtain a cooled liquid fraction, a step of introducing said liquid fraction cooled in step e) at the top of the reaction chamber of said reactor n, the steps a) to f) being carried out, unless indicated otherwise, for each reactor n of the cascade, n being between 1 and N. The invention also relates to a device of N stirred gas/liquid reactors in a cascade, enabling the oligomerization process to be carried out.

Process for oligomerization in a cascade of stirred gas-liquid reactors with staged injection of ethylene

Reaction device which makes possible the oligomerization of olefins to give linear olefins and preferably linear &#x3b1;-olefins, comprising a gas/liquid reactor and a reactor of plug-flow type. The reaction device is also employed in an oligomerization process.

Process for the oligomerization of ethylene with stirred gas/liquid reactor and plug-flow reactor sequence

The invention relates to a process for dehydration of an ethanol feedstock into ethylene comprising at least the stages:

Process for dehydration of ethanol into ethylene using pretreatment of the feedstock

A process for dehydration of an ethanol feedstock to ethylene by:

Process for dehydration of ethanol to ethylene at low energy consumption

The invention describes a process for the production of middle distillate hydrocarbon bases from an ethanol feedstock that is produced from a renewable source that is obtained from biomass, whereby said process comprises a stage for purification of said feedstock, a stage for transformation of said purified feedstock into a light olefinic effluent that comprises at least 30% by weight of olefins that have between four to six carbon atoms relative to the total mass of the formed hydrocarbon compounds, whereby said stage works in the presence of a catalyst that comprises at least one zeolite that is selected from among the zeolites that have a structural type that appears in the following list: CHA, ERI, MTF, AEI, AEL, FER, EUO, MEL, MFS, TON, MTT and the zeolites ZBM-30, ZSM-48, IM-5 and IZM-2, taken by themselves or in a mixture, a stage for separation of the olefinic effluent that is obtained from stage b) in such a way as to eliminate at least a portion of the water that is formed during stage b) to produce at least one hydrocarbon gaseous effluent that for the most part has three or fewer carbon atoms and at least one olefinic hydrocarbon liquid effluent that for the most part has more than four carbon atoms, and a stage for oligomerization of at least a portion of the hydrocarbon effluents that are obtained from stage c) in the presence of an amorphous or zeolitic catalyst that has at least pore openings that contain 10 or 12 oxygen atoms, producing middle distillate hydrocarbon bases.

Flexible process for transformation of ethanol into middle distillates

The invention describes a process for the production of middle distillate hydrocarbon bases from an ethanol feedstock that is produced from a renewable source that is obtained from biomass, comprising a stage for purification of said feedstock, a stage for dehydration of said purified feedstock into an effluent that is for the most part ethylene and comprises water, at least one stage for separating water, a first stage for oligomerization of the effluent that is for the most part ethylene into at least one olefinic effluent that comprises at least 80% by weight of olefins that have four or more carbon atoms, in the presence of a homogeneous catalyst that comprises at least one bivalent nickel compound, whereby a second oligomerization stage produces middle distillate hydrocarbon bases in the presence of an amorphous or zeolitic catalyst that has at least pore openings that contain 10 or 12 oxygen atoms, producing middle distillate hydrocarbon bases, and a fractionation stage.

Flexible process for transformation of ethanol into middle distillates implementing a homogeneous catalytic system and a heterogeneous catalytic system

The present invention describes a process for converting a heavy feed which is flexible for the production of propylene, gasoline and middle distillate. The process uses a catalytic cracking unit and a unit for the oligomerization of C4 to C9 olefins. The process of the invention includes selective hydrogenation of the unrefined gasoline cut obtained from the catalytic cracking unit and separation between a light gasoline cut and a heavy gasoline cut, the light gasoline being directed to the oligomerization unit.

Process for converting a heavy feed using a catalytic cracking unit and a step for selective hydrogenation of the gasoline obtained from catalytic cracking

A process for dehydration of an ethanol feedstock into ethylene, comprising the vaporization of said ethanol feedstock in a mixture with at least a portion of the recycled purified water stream from heat exchange with the effluent that is obtained from the last reactor.

Process for dehydration of ethanol into ethylene with low energy consumption

A process for dehydration of an ethanol feedstock into ethylene, comprising the vaporization of said dilute hydrated ethanol feedstock in an exchanger, with heat exchange with the effluent that is obtained from a last reactor, with said mixture being introduced into said vaporization stage at a pressure that is lower than the pressure of the effluent that is obtained from the last reactor, the compression of the mixture that is vaporized in a compressor, the introduction of the vaporized and compressed mixture, into at least one adiabatic reactor that contains at least one dehydration catalyst.

Process for dehydration of dilute ethanol into ethylene with low energy consumption without recycling of water

A process for producing a base for a fuel from a C2 ethanol feedstock, by a first stage for oligomerization of the feedstock into a hydrocarbon effluent that contains a mixture of olefins for the most part having between 4 and 30 carbons, and contains a C10-C24 fraction that has a mean linearity that is greater than 60%, in the presence of a homogeneous catalytic system that contains a metal precursor of titanium, zirconium, hafnium, nickel and/or iron, a second stage for oligomerization of a portion of the effluent that is obtained from stage a), into a hydrocarbon effluent that contains a mixture of olefins for the most part having between 4 and 30 carbon atoms, and containing a C10-C24 fraction that has a mean linearity that is less than 50%, in the presence of a homogeneous catalytic system.

Process for the production of a fuel base from an ethylene feedstock implementing at least one oligomerization stage in the presence of a homogeneous catalytic system

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Vienne, France

Natacha Touchais