Societe Nationale Elf Aquitaine

Elf France

Centre National De La Recherche Scientifique

Institut Francais Du Pe'trole

Elf Aquitaine

Arkema France

Rhone-poulenc Chimie

Total Research & Technology Feluy

Total Petrochemicals Research Feluy

Elf Antar France

Centre National De La Recherche Scientifique, Elf France

Total Raffinage France

Francois Fajula

Francois Figueras

Francesco S Di Renzo

Claude Gueguen

Thierry Des Courieres

Fredj Fitoussi

Philippe Schulz

Roger Dutartre

Latifa Moudafi

Nikolai Nesterenko

Walter Vermeiren

Jean-Pierre Dath

Pierre Dufresne

Christian Marcilly

Christine Travers

Francis Raatz

Eric Lacroix

Laurent Gilbert

Bruno Vuillemin

Jacques Bousquet

Joel Patarin

Serge Hub

Didier Anglerot

Wolfgang Holderich

Remy Teissier

Catherine Zivkov

Krijn Pieter De Jong

Maxime Lacroix

Markus Brandhorst

Petra Elisabeth De Jongh

Jovana Zecevic

Alain Rabion

Claude Moreau

Sylvie Razigade-Trousselier

Didier Tichit

Annie Finiels

Thierry Des Courrieres

Abbas Mattrod-Bashi

Nisso Barbouth

Thomas-Maurice Roussel

Elodie Bourgeat-Lami

Thierry Descourieres

Serge Nicolas

Mercedes Vera Pacheco

Sylvie Gomez

Vasile Hulea

Jean René Bernard

Francesco DiRenzo

Wilm Eickelberg

Carolina Petitto

Sander Van Donk

Metin Bulut

Adrianus Nicolaas Van Laak

The present invention relates to a process for reducing residuals content in a vinyl aromatic polymer, said residuals comprising essentially unpolymerized vinyl aromatic monomer, wherein the vinyl aromatic polymer in the molten state is brought in contact with a solid in powder capable to catalyze the alkylation of said residual vinyl aromatic monomer on the vinyl aromatic polymer. Advantage of the present invention is a sharp reduction of the unpolymerized vinyl aromatic monomer in the vinyl aromatic polymer without generating a new residual and without inducing a colored vinyl aromatic polymer. The present invention also relates to said vinyl aromatic polymer having a low residuals content.

Process for reducing residuals content in vinyl aromatic polymers

The present invention relates to metalloaluminophosphate (MeAPO) molecular sieve with lamellar crystal morphology having an empirical chemical composition on an anhydrous basis, after synthesis and calcination, expressed by the formula HxMeyAlzPkO2 wherein, y+z+k=1 x&#x3c;=y said molecular sieve having predominantly a plate crystal morphology in which the width (W) and the thickness (T) are W/T is &#x3e;=10 The above metalloaluminophosphate (MeAPO) molecular sieve can be made by a method which comprises: a) forming a reaction mixture containing a texture influencing agent (TIA), an organic templating agent (TEMP), at least a reactive inorganic source of MeO2 insoluble in the TIA, reactive sources of AI203 and P205, b) crystallizing the above reaction mixture thus formed until crystals of the metalloaluminophosphate are formed, c) recovering a solid reaction product, d) washing it with water to remove the TIA and e) calcinating it to remove the organic template. The present invention also relates to catalysts consisting of the above MeAPO molecular and relates to a process for making an olefin product from an oxygen-containing, halogenide-containing or sulphur-containing feedstock.

Metalloaluminophosphate molecular sieves with lamellar crystal morphology and their preparation

The present invention relates to a process for the preparation of lauryllactam in which a Beckmann rearrangement of cyclododecanone oxime is carried out. Said process is carried out in the gas phase at a temperature of between 180 and 450&#xb0; C. in the presence of a microporous material having a three-dimensional inorganic main structure composed of tetrahedra connected via a common edge, called zeolite.

Process for the synthesis of lauryllactam (L12) by gas phase catalytic rearrangement of cyclododecanone oxime

The invention concerns a method for selectively desulphurizing thiopene compounds contained in hydrocarbons derived from crude oil distillation, whether refined or not, which consists in oxidising the thiophene sulphur atoms into sulphone in the presence of an oxidising agent and in separating said sulphonated compounds from said hydrocarbons. The invention is characterised in that it consists in oxidising the thiophene compounds in a two-phase turbulent medium comprising a hydrocarbon phase and an aqueous phase, in the presence of at least an oxidising agent soluble in at least one of the two phases and of at least a metal catalyst in soluble or dispersed form in a liquid of in solid form, separation and oxidation occurring simultaneously.

Method for desulfurizing thiophene derivatives contained in fuels

Method for preparing lattice-inserted titanium zeolites, and use thereof

Activated silica enriched mazzite, production method and application

Process for the hydroxyalkylation of a carbocyclic aromatic ether

Process for the synthesis of a silica-enriched crystalline aluminosilicate having the offretite structure from a nucleation gel A containing sources of silicon, aluminium, alkali metal ions, an organic structuring agent and water and a growth gel B containing sources of silicon, aluminium, alkali metal ions and water. The crystals formed are calcined, the ions are replaced by protons and the crystals are subjected to a hydrothermal treatment followed by a treatment with a strong mineral acid. The aluminosilicate formed has a good selectivity in acid catalysis reactions and is characterized by its good stability.

Process for the synthesis of a silica enriched crystalline

Process for the preparation of a crystalline aluminosilicate enriched in silica, having the structure of mazzite, by hydrothermal crystallization of a gel containing sources of silicon, aluminum and alkali metal ions, in the presence of an organic structuring agent, characterized in that the source of aluminum is a zeolite Y in the form of spheres. The mazzite obtained does not contain any silicoalumina debris out of the lattice. It is employed as catalyst for the conversion of hydrocarbons or as molecular sieve.

Process for the synthesis of a crystalline aluminosilicate enriched in

A process is provided for dealuminization of zeolites having large pores, the diameter of the aperture of the pores being greater than or equal to about 0.7 nm and the silica/alumina ratio greater than or equal to about 6. The process comprises acid leaching of the raw zeolite containing the structuring agent. The dealuminized zeolites obtained are useful as catalysts for the transformation of hydrocarbons and as selective organophilic adsorbents.

Process for dealuminization of the synthetic zeolites of large pores,

This invention relates to a new zeolite from the class of mazzite, containing a fraction of non-exchangeable potassium cations, and also to a process for its synthesis. The crystallinity and the adsorption capacity of the protonated form of this zeolite are maintained after a prolonged hydrothermal treatment.

Zeolite from the class of mazzite, process for its synthesis, and its

Zeolite from the class of mazzite, process for its synthesis, an its use

The invention relates to a process for isomerizing normal paraffins, particularly C.sub.5 -C.sub.6, in the presence of at least one catalyst based on an omega zeolite having a molar ratio SiO.sub.2 /Al.sub.2 O.sub.3 ranging from 6.5 to 80, a content by weight of sodium lower than 0.2%, crystalline parameters 'a' and 'c' respectively smaller than or equal to 1.814 nm and 0.760 nm, a capacity of adsorption of nitrogen, measured at 77K under a partial pressure of 0.19, higher than about 8% by weight, the catalyst also comprising at least one metal from group VIII of the periodic table of elements, preferably platinum or/and palladium.

Process for isomerizing normal paraffins in the presence of at least one

The present invention concerns binary zeolitic systems comprising two zeolites A and B having different crystalline structures while having common structural units. The crystals of the zeolite A form a central core surrounded by a crown of crystals of zeolite B, the zeolites A and B being disposed concentrically and following the same longitudinal axis. These systems are formed by the introduction of a nucleation gel containing germs of the zeolite A in a growth gel where the crystallization parameters are favorable to the crystallization of the zeolite B. The binary zeolitic systems are useful as catalysts for transforming hydrocarbons and more especially as cracking catalysts.

Binary zeolitic systems, their synthesis and their utilization

This invention concerns an omega type zeolite of high thermal stability, present in the form of hexagonal prismatic monocrystals having scored or plane faces of 0.1 .mu.m in edge and 0.5 to 5 .mu.m in length, this zeolite being obtained through crystallization from a mother solution containing a silica source, alumina, metallic oxide, an organic cation and water, in which the alumina source is a crystalline aluminosilicate of which at least one part is in suspension in the mother solution. In its acid form this zeolite can be used as catalyst for hydration of olefins and isomeric change of xylenes.

Omega type zeolite having high thermal stability, its process of

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Teyran, France

Francois Fajula