Arkema France

Ceca S.a.

Ifp Energies Nouvelles

Katholieke Universiteit Leuven

Serge Nicolas

Cécile Lutz

Ludivine Bouvier

Philibert Leflaive

Catherine Laroche

Jean-Luc Dubois

Quitterie Persillon

Karine Lopez

Arnaud Baudot

Alexander Korzhenko

Patrick Alex

Sean Michael Stabler

Yvan Lecomte

Guillaume Ortiz

Marie-Laurence Labede

Jullian Vittenet

Christian Gancet

Paul-Guillaume Schmitt

Sylvie Szendrovics

Stéphane Kieger

Guy-Henri Durand

Alice Medevielle

Heidy Ramirez-Mendoza

Rémi Le Bec

Jeroen Jordens

Yves Taupin

Tom Van Gerven

Amélie Merceron

Mickael Havel

Marie-Laurence LABÈDE

The present invention relates to a process for preparing zeolite crystals having a multimodal particle size distribution, and the sizes of which are between 0.02 &#x3bc;m and 20 &#x3bc;m, said process comprising feeding at least two reactors each with a synthesis gel capable of forming zeolite crystals, carrying out a crystallization reaction, in parallel, in each of the at least two reactors, and mixing the reaction media of the at least two reactors, after the start of at least one of the crystallization reactions.

Process for the multi-reactor synthesis of zeolite crystals having a controlled particle size

An intensified continuous process for synthesizing zeolite crystals is described, said process comprising a continuous supply of a continuously prepared gel, said gel then being continuously crystallized, said process comprising at least one application of ultrasound.

Process for the continuous preparation of zeolites using ultrasound

The present invention relates to a process for preparing zeolite crystals having a multimodal particle size distribution, and the sizes of which are between 0.02 &#x3bc;m and 20 &#x3bc;m, said process comprising a first introduction of one or more seeding agents into the tubular reactor or upstream of the tubular reactor, and at least one second introduction of one or more, identical or different, seeding agents into the tubular reactor.

Process for the synthesis, with multiple seeding, of zeolite crystals having a controlled particle size

The present invention relates to a process for preparing zeolite crystals continuously, comprising the continuous introduction of a composition capable of generating zeolite crystals into at least one crystallization reaction zone subjected to stirring means, giving said composition a flow characterized by a relative Reynolds number Reof between 40 and 50 000, and the continuous recovery of the crystals formed according to a flow characterized by a net Reynolds number Reof between 1 and 1500.

Process for continuously synthesizing zeolite crystals

The present invention concerns the use, for gas separation, of at least one zeolite adsorbent material comprising at least one FAU zeolite, said adsorbent having an external surface area greater than 20 m&#xb7;g, a non-zeolite phase (PNZ) content such that 0&#x3c;PNZ&#x2264;30%, and an Si/Al atomic ratio of between 1 and 2.5. The invention also concerns a zeolite adsorbent material having an Si/Al ratio such that 1&#x2264;Si/Al&#x3c;2.5, a mesoporous volume of between 0.08 cm&#xb7;gand 0.25 cm&#xb7;g, a (Vmicro&#x2212;Vmeso)/Vmicro ratio of between &#x2212;0.5 and 1.0, non-inclusive, and a non-zeolite phase (PNZ) content such that 0&#x3c;PNZ&#x2264;30%.

Zeolite adsorbents having a high external surface area and uses thereof

The present invention concerns the use, for gas separation and/or gas drying, of at least one zeolite adsorbent material comprising at least one type A zeolite, said adsorbent having an external surface area greater than 20 m&#xb7;g, a non-zeolite phase (PNZ) content such that 0&#x3c;PNZ&#x2264;30%, and an Si/Al atomic ratio of between 1.0 and 2.0. The invention also concerns a zeolite adsorbent material having an Si/Al ratio of between 1.0 and 2.0, a mesoporous volume of between 0.07 cm&#xb7;gand 0.18 cm&#xb7;g, a (Vmicro&#x2212;Vmeso)/Vmicro ratio of between &#x2212;3 and 1.0, non-inclusive, and a non-zeolite phase (PNZ) content such that 0&#x3c;PNZ&#x2264;30%.

The present invention relates to process for synthesizing zeolite X crystals comprising at least one step of adding seeding agent(s) into a synthesis gel and at least one step of forming zeolite X crystals at a temperature strictly greater than 120&#xb0; C., preferably equal to or greater than 130&#xb0; C.

Process for synthesizing zeolite crystals with seeding agent

The present invention concerns zeolites with hierarchical porosity having a molar ratio Si/Al of between 1 and 1.4, inclusive, of which the average diameter, as a number, is between 0.1 &#x3bc;m and 20 &#x3bc;m, having controlled and optimized crystallinity, and having mesoporosity such that the mesoporous outer surface area is between 40 m&#xb7;gand 400 m&#xb7;g. The present invention also concerns the method for preparing said zeolites with hierarchical porosity.

Zeolites with hierarchical porosity

The present invention concerns Y-type FAU zeolites with hierarchical porosity having an Si/Al atomic ratio strictly greater than 1.4 and less than or equal to 6, having controlled and optimised crystallinity, and having mesoporosity such that the mesoporous outer surface area is between 40 m&#xb7;gand 400 m&#xb7;g. The present invention also concerns the method for preparing said Y-type FAU zeolites with hierarchical porosity.

Hierarchically porous zeolites

The present invention relates to zeolitic adsorbents based on agglomerated crystals of FAU zeolite containing barium and/or potassium, with large external surface area, combining optimum properties in terms of selectivity and mechanical strength. These adsorbents find applications in the separation of cuts of C8-aromatic isomers and notably of xylenes, in the separation of isomers of substituted toluene such as nitrotoluene, diethyltoluene, toluenediamine, in the separation of cresols, and in the separation of polyhydric alcohols such as sugars.

Zeolitic adsorbents with large external surface area, process for preparing them and uses thereof

The present invention relates to a zeolite material in the form of FAU zeolite nanocrystal aggregates, to the method for preparing said material, to the zeolite agglomerates prepared from said material with a binder, and to the uses of said material and agglomerate as adsorbents for gas-phase or liquid-phase separation operations, and particularly in methods for separating gas or liquid flows.

Zeolite nanocrystal aggregates

The invention relates to a method for separating meta-xylene from C8 aromatic fractions, using a zeolitic adsorbent based on sodium-exchanged or sodium-and-lithium-exchanged agglomerated crystals of zeolite Y, with a large external surface area.

Method for separating meta-xylene using a zeolitic adsorbent with a large external surface area

The present invention relates to zeolite materials in the form of agglomerates comprising at least one mesoporous Faujasite zeolite with an Si/Al ratio which is strictly greater than 1.4 and having both the characteristics of mesoporous zeolites, the properties associated with microporosity and the mechanical properties of zeolite agglomerates without mesoporous zeolite. The invention also relates to the process for preparing the said zeolite materials in the form of agglomerates.

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Lons, France

Serge Nicolas