Ifp Energies Nouvelles

Alexandre Vonner

Frederic Augier

Damien Leinekugel Le Cocq

Pedro Maximiano Raimundo

Ludovic Raynal

Catherine Laroche

Natacha Touchais

Tiago Sozinho

Pascal Etienne

Aude Royon-Lebeaud

Lionel Magna

Frédéric Augier

Aude Royon-lebeaud

The present invention describes a device for supplying or collecting from a column forming part of an assembly of columns in series, for use in a simulated moving bed separation process. The present device can be used to very substantially reduce the non-selective volumes in each column.

Concept for collection and distribution channels for a simulated moving bed separation process using N-columns in series

The present invention relates to a gas/liquid reactor for the oligomerization of gaseous ethylene, comprising a gaseous ethylene injection device and a liquid injection device, said injection devices advantageously being arranged so that the injection of the liquid can bring about a reduction, by shear, of the size of the ethylene bubbles, during the injection of the gaseous ethylene. The gas/liquid reactor according to the present invention may be used for any gaseous olefinic feedstock injected into a liquid phase.

Method for oligomerization in a reactor comprising a gas/liquid double distributor

The present invention relates to the field of gas/liquid reactors making possible the oligomerization of ethylene to give linear olefins by homogeneous catalysis with a reaction chamber comprising transverse internals capable of slowing down the ascent of the gaseous ethylene in the said reactor.

Gas/liquid oligomerization reactor comprising transverse internals

The present invention relates to an oligomerization process implemented in a sequence of at least two gas/liquid reactors, placed in series, comprising at least one gas headspace recycle loop. The process more particularly relates to the oligomerization of ethylene to linear alpha-olefins such as 1-butene, 1-hexene, 1-octene or a mixture of linear alpha-olefins.

Oligomerization process implementing the recycling of the gas headspace

The present invention relates to an oligomerization process implemented in a gas/liquid reactor comprising a headspace recycle loop. The process more particularly relates to the oligomerization of ethylene to linear alpha-olefins such as 1-butene, 1-hexene, 1-octene or a mixture of linear alpha-olefins.

Oligomerization process using a recycle of gaseous headspace

The present invention relates to the field of gas/liquid reactors permitting the oligomerization of olefins to give linear olefins by homogeneous catalysis, comprising a reaction chamber and vertical internal means of compartmentalization.

Compartmentalized oligomerization reactor

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

The present invention relates to an oligomerization process using a reaction device comprising a dispersion means. In particular, the process relates to the oligomerization of ethylene to give linear &#x3b1;-olefins, such as 1-butene, 1-hexene or 1-octene, or a mixture of linear alpha-olefins.

Oligomerization method using a reaction device comprising a dispersion means

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 present invention describes a device for distributing incoming fluid or for collecting fluid being discharged from a column forming part of an assembly of N columns in series intended to be used in a simulated moving bed separation process. The present device can be used to very substantially reduce the non-selective volumes at each column, while at the same time providing the flow with good synchronicity.

Peripheral distribution or collection system for a simulated moving bed separation method using N columns in series

The present invention describes a process for the simulated moving bed separation of xylenes which can be used for the treatment of paraxylene-rich feeds (more than 25% by weight of paraxylene), in which the operating conditions are optimized by means of a specific relationship between the cycle time and the desorbant flow rate.

Simulated moving bed xylenes separation process, and optimized operating conditions for units treating paraxylene-rich feeds

The present invention describes a process for the simulated moving bed separation of xylenes, in which the operating conditions are optimized by means of a specific relationship between the cycle time and the flow rate of the desorbant.

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Mions, France

Alexandre Vonner