Ifp Energies Nouvelles

Rhodia Operations

Specialty Operations France

Institut Francias Du Petrole

Eni S.p.a.

Lars Fischer

Cecile Thomazeau

Renaud Revel

Carine Petit-Clair

Vincent Coupard

Denis Uzio

Fabienne Le Peltier

Jacques Cavezzan

David A Vanzin

Bernadette Rebours

Christelle Chretien

Sylvie Lacombe

Antoine Fecant

Jean-Marie Basset

Anne-Claire Dubreuil

Joseph Lopez

Stephan Verdier

Catherine Verdon

Christophe Chau

Jean-Pierre Candy

Loïc Rouleau

Anne Claire Dubreuil

Rodolphe Sapey-triomphe

Yan Shi

Cédric Humblot

Mehrdji Hemati

Stéphane Morin

Jean-François Thome

Christophe James

Frederic Portejoie

Frederic Portejole

Stephane Morin

Karel Vits

Lois Sorbier

Layane Deghedi

Samy Ould-Chikh

Loïc Sorbier

Cécile Thomazeau

The present invention relates to new lightly colored prills of hydroquinone. More particularly, the invention provides a new method for preparing said lightly colored prills of hydroquinone. The invention also relates to said prills of hydroquinone obtained by said new method.

Prills of hydroquinone and method for obtaining the same

The invention relates to a novel solid form of diphenol compound. A process for the preparation of diphenol prills having a spherical shape is disclosed. Said process comprising providing a molten composition comprising from 50 to 100 wt. % of a diphenol compound or a mixture of at least two diphenol compounds, and less than 0.1 wt. % of water; forcing said molten composition through at least one droplet generator means to form droplets; and cooling said droplets to form solid diphenol prills. The diphenol prills obtainable by said process are also one subject-matter of the invention.

Diphenol and phenol prills and method for obtaining the same

The present invention relates to the use of at least two phenol derivatives jointly with at least one ancillary polymerization inhibitor which is different from these two phenol derivatives and particularly is selected from phenol derivatives, amine derivatives, thiazine derivatives, nitroso compounds, N-oxyl derivatives, metal salts, quinone derivatives, and mixtures thereof, to inhibit the polymerization of ethylenically unsaturated monomers comprising at least one heteroatom, it being also possible for a dispersant to be incorporated. The present invention also relates to a corresponding polymerization-inhibiting composition and to the corresponding process for preparing ethylenically unsaturated monomers comprising at least one heteroatom, and particularly acrylic monomers.

Use of polymerization inhibitor compositions

A process for unloading a container containing an oxidizable compound having a melting point Tgreater than 15&#xb0; C. is described. This process comprises the steps consisting in heating the container using a heating means until the oxidizable compound is liquid, the temperature of the heating means remaining less than or equal to T+105&#xb0; C., and then unloading the oxidizable compound in the liquid state. A process for handling such an oxidizable compound, comprising this unloading step, and also a device enabling this process to be carried out, are also proposed.

Method for discharging an oxidisable compound in the liquid state

The invention describes a composition that inhibits the polymerization of ethylenically unsaturated monomers, including at least 98% by weight of 4-tert-butylcatechol (4-TBC), 0.03% to 0.2% by weight of catechol (PC), and at least one impurity selected among 3-tert-butylcatechol, tert-butylhydroquinone, 3,5-di-tert-butylcatechol and mixture thereof, the total quantity of said impurities and of the PC being 0.1% to 0.8% by weight of said composition. The invention also describes a method for removing said polymerization-inhibiting composition present in a mixture including at least one ethylenically unsaturated monomer.

Composition preventing the polymerization of ethylenically unsaturated monomers and the removal thereof before polymerization

The invention concerns a catalyst comprising a porous support, palladium, at least one metal selected from the group constituted by alkalis and alkaline-earths, in which: The invention also concerns the preparation of the catalyst and its use in selective hydrogenation.

Catalyst comprising palladium and its application in selective hydrogenation

A process is described for preparing a catalyst comprising at least one porous support and at least one metallic phase containing nickel and tin in a proportion such that the Sn/Ni molar ratio is in the range 0.01 to 0.2, said process comprising at least the following steps in succession:

Process for preparing a Ni/Sn supported catalyst for the selective hydrogenation of polyunsaturated hydrocarbons

The invention concerns a catalyst comprising nickel on an aluminum oxide support. The aluminum oxide support has, in the calcined state, a diffractogram obtained by X ray diffractometry comprising peaks which correspond to the following interplanar spacings and relative intensities: 

Selective hydrogenation catalyst, and process for its preparation

The invention concerns a catalyst comprising palladium on an oxide of aluminum support. In the calcined state, the oxide of aluminum support has a diffractogram obtained by X ray diffraction comprising peaks which correspond to the following interplanar spacings and relative intensities: 

Selective hydrogenation catalyst and process for its preparation

The invention relates to a process for dehydrogenation of a hydrocarbon feedstock in the presence of a catalyst that comprises a noble metal M that is selected from the group that consists of platinum, palladium, rhodium, and iridium, at least one promoter X1 that is selected from the group that consists of tin, germanium, and lead, and optionally a promoter X2 that is selected from the group that consists of gallium, indium and thallium, an alkaline or alkaline-earth compound and a porous substrate, in which the atomic ratio X1/M and optionally X2/M is between 0.3 and 8, the H/M ratio that is measured by hydrogen adsorption is greater than 0.40, and the bimetallicity index BMI that is measured by hydrogen/oxygen titration is greater than 108.

Process for dehydrogenation in the presence of a bimetallic or multi-metallic catalyst that has an optimized bimetallicity index and an optimized hydrogen adsorption capacity

A process for the treatment of an olefinic fraction, using a catalyst prepared by a process comprising:

Process for the preparation of multimetallic catalysts that can be used in reactions for transformation of hydrocarbons

The invention relates to a process for the preparation of a catalyst comprising: The invention also relates to a process for the treatment of an olefinic fraction that uses the catalyst prepared [by] said preparation process.

The invention relates to the field of catalyst supports presenting a pore volume having an at least bimodal distribution, thus defining a main porosity and a secondary porosity, the main porosity being of an average size greater than the secondary porosity.

Alumina-on-alumina composite supports

Growing community of inventors

Vienne, France

Lars Fischer