Centre National De La Recherche Scientifique

Totalenergies Onetech

Total Research & Technology Feluy

Ecole Nationale Superieure D Ingenieurs De Caen

Université De Caen Normandie

Université De Caen Basse Normandie

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Jean-Pierre Gilson

Nikolai Nesterenko

Valentin Valtchev

Delphine Minoux

Svetlana Mintova

Florent Dubray

Julien Grand

Jean-Pierre Dath

Svetlana Mintova Lazarova

François Fajula

Daniel Thomas

Jean-Michel Goupil

Cindy Aquino

Kok-Giap Haw

Sylviane Pulvin

Catherine Bedel-Cloutour

Zhengxing Qin

Stanislav Konnov

Stijn Van Daele

Kamila Goldyn

Hussein Awala

Siddulu Naidu Talapaneni

Anne Galarneau

Gilbert Renard

Claude Jamrozik

Christophe La Hêtraie Langellier

Daniel 175 Rue Sonia Henié Brunel

The present invention relates to a method of post-synthetic downsizing zeolite-type crystals and/or agglomerates thereof to nanosized particles, and in particular a heating-free and chemical-free method. The present invention also relates to nanosized particles of zeolite-type material capable of being obtained by the method of the invention and to the use of such particles as a catalyst or catalyst support for heterogeneous catalyst, or as molecular sieve, or as a cation exchanger.

Post-synthetic downsizing zeolite-type crystals and/or agglomerates thereof to nanosized particles

The present disclosure relates to a novel staged-synthesis method for introduction of various metals in the structure of zeolite frameworks by isomorphous substitution. This new method is based on a hydrothermal synthesis in which the metal addition to the precursor suspensions (gel) is delayed. This so-called 'staged-synthesis method' allows to obtain nanosized silanol highly homo-geneous crystalline zeolite structures with a control of the metal location.

Isomorphous substitution of metals during the synthesis of a zeolite framework

Process for the conversion of non-oxidative coupling of methane to ethylene, under non-oxidative conditions, comprising: providing a first stream containing at least 50 vol. % of methane based on the total volume of said first stream; providing a catalyst; putting in contact said first stream with said catalyst at a weight hour space velocity ranging from 0.5 to 100 h, a temperature ranging from 500&#xb0; C. to 1100&#xb0; C. and a pressure ranging from 0.1 MPa to 5 Mpa in the absence of oxygen; recovering a second stream containing unconverted methane if any, ethylene and hydrocarbons having at least 2 carbon atoms. Said process is remarkable in that said catalyst is a synthetic zeolite material, containing at least one metal M with silicon to metal M molar ratio Si/M as determined by inductively coupled plasma optical emission spectrometry ranging from 100 to 65440 and in that said metal M is incorporated inside of the zeolite tetrahedral sites.

Non-oxidative conversion of methane into ethylene using isomorphous metal-substituted zeolite framework catalyst

The present disclosure relates to a novel method for introducing various metals in the structure of zeolite frameworks by isomorphous substitution. This new method is based on a hydrothermal reaction of the metal with the zeolite. This method allows obtaining zeolite with a structure and with control of the metal location.

Isomorphous substitution of metals on synthesized zeolite framework

The present invention relates to a method for the preparation of faujasite nanocrystals, to faujasite nanocrystals, to a method for the preparation of a stable colloidal suspension of faujasite nanocrystals, to a stable colloidal suspension of faujasite nanocrystals, and to the use of said faujasite nanocrystals and said stable colloidal suspension of faujasite nanocrystals in various applications.

Method for the preparation of a synthetic faujasite material comprising monodisperse nanoparticles composed of single nanocrystals

Catalyst compositions comprising an inorganic porous material with pore diameters of at least 2 nm and of crystals of molecular sieve, characterized in that the crystals of molecular sieve have an average diameter, measured by scanning electron microscopy, not bigger than 50 nm, and in that the catalyst composition presents a concentration of acid sites ranges from 50 to 1200 &#x3bc;mol/g measured by TPD NH3 adsorption; and the XRD pattern of said catalyst composition is the same as the X ray diffraction pattern of said inorganic porous material.

Catalyst compositions comprising small size molecular sieves crystals deposited on a porous material

Some embodiments are directed to a method for the preparation of defect-free nanosized synthetic zeolite materials, to the defect-free nanosized synthetic zeolite materials, to stable colloidal suspensions of the defect-free synthetic zeolite materials, and to the use of the defect-free nanosized synthetic zeolite materials and the stable colloidal suspensions in various applications.

Method for the preparation of defect-free nanosized synthetic zeolite materials

The present invention relates to a method for the preparation of a synthetic crystalline zeolite material, to said synthetic crystalline zeolite material, and to the uses of said method and said synthetic crystalline zeolite material in various applications.

Method for the preparation of synthetic crystalline zeolite materials with enhanced pore volume

A catalyst composition contains an inorganic porous material with pore diameters of at least 2 nm and of crystals of molecular sieve. The crystals of molecular sieve have an average diameter, measured by scanning electron microscopy, not bigger than 50 nm. The catalyst composition has a concentration of acid sites ranges from 50 to 1200 &#x3bc;mol/g measured by TPD NH3 adsorption. An XRD pattern of the catalyst composition is the same as an XRD pattern of the inorganic porous material.

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Cairon, France

Jean-Pierre Gilson