Centre National De La Recherche Scientifique

Universite Claude Bernard – Lyon1

Ifp Energies Nouvelles

Université Claude Bernard Lyon I

Arkema France

Roquette Freres

Institut Vietnamien De Chimie Industrielle

Cnrs

Universite Claude Bernard De Lyon 1

Nadine Essayem

Franck Rataboul

Emmanuelle Guillon

Amandine Cabiac

Catherine Pinel

Flora Chambon

Gilbert Sapaly

Cyril Feche

Rodrigo Lopes De Souza

Georges Fremy

Mathias Ibert

Francois Figueras

Michele Besson

Michel Lacroix

Georges Gelbard

Jorge Palomeque

Elodie Zausa

Wilma Gonzalez

Berna Hamad

Paulo Gustaro Pries De Oliveira

Rodrigo Lopez De Souza

Thi Thuy Ha Nguyen

Thi Thu Trang Nguyen

Thi Thu Ha Vu

Alain Perrard

Marion Eternot

Hicham Ait Rass

Demian Patrick Fabiano

Dilson Cardoso

Aude-Claire Doiseau

Demian Fabiano

Michèle Besson

The invention relates to a method for the isomerization of glucose into fructose in water in the presence of a solid base catalyst characterized by its reversibility of COadsorption at a low temperature, the catalyst being a catalyst comprising at least one supported or non-supported lanthanide oxide or a molecular sieve based on silicon containing the organic template thereof. The invention also relates to a method for preparing HMF from glucose, comprising the isomerization of glucose into fructose.

Method for the isomerisation of glucose into fructose

A method for preparing 2,5-furandicarboxylic acid (FDCA) by oxidizing 5-hydroxymethylfurfural (HMF) in water in the presence of a weak base and a supported catalyst comprising platinum and bismuth, in which the Bi/Pt molar ratio in the catalyst is between 0.1 and 0.3, and preferably between 0.15 and 0.3.

Method for preparing 2,5-furandicarboxylic acid

A method for preparing at least one ester of levulinic acid from a biomass includes steps of impregnating the biomass by an organic or inorganic acid, and putting the acidified biomass in contact with a supercritical fluid including at least one olefin.

Method for preparing levulinic acid esters

A method for preparing a dialkyloxydianhyrohexitol (dimethylisosorbide) composition by etherification of dianhydrohexitol (isosorbide). The aim is to achieve a 'clean' method that avoids the use of a methylation agent such as dimethyl sulfate or methyl chloride, which generates stoechiometric quantities of salts, or expensive dialkyl-carbonates, wherein only one of the two methyl groups participates in the preparation of mixed isosorbide ethers. The method involves using at least one O-alkylation agent and a catalyst including an acid or an acid salt, preferably a catalyst having Lewis or Br&#xd8;nsted acid properties. A device for carrying out the method wherein the device includes a vaporization oven and a reaction oven is also described.

Method for preparing dialkyloxydianhyrohexitol by etherification of dianhydrohexitol using a light alcohol, in the presence of an acidic catalyst

A method for synthesizing a composition comprising at least one acid ester stemming from the biomass and an organic biosolvent is provided. The method comprises the esterification reaction between at least one acid stemming from the biomass and at least one alcohol, in the presence of an acid catalyst and of the organic biosolvent, the organic biosolvent being selective of the ester or of the esters formed relatively to the acid or to the starting acids and non-miscible with the alcoholic solution of the acid stemming from the biomass.

Method for obtaining compositions of biosolvents by esterification and obtained compositions of biosolvents

The invention relates to a method for preparing 5-hydroxymethylfurfural (HMF) by reacting hexose in water and in the presence of carboxylic acid. The present invention further relates to the preparation of 5-hydroxymethylfurfural (HMF) by reacting hexose in water and in the presence of carboxylic acid and of a heterogenous acid catalyst. The invention also relates to an HMF-rich carboxylic acid solution.

Method for producing 5-hydroxymethylfurfural

The invention relates to a method for preparing furfural by reacting pentose in water and in the presence of carboxylic acid and of a heterogeneous acid catalyst, the method being conducted in an aqueous solution of carboxylic acid as a reaction medium. The present invention also relates to the preparation of furfural by reaction of pentose in water and in the presence of carboxylic acid and of a heterogeneous acid catalyst. The invention also relates to an aqueous solution of carboxylic acid rich in furfural.

Method for preparing furfural

The invention relates to a process for transformation of lignocellulosic biomass or cellulose using stable non-zeolitic heterogeneous catalysts that are based on tin and/or antimony, preferably dispersed on a substrate. The use of these catalysts makes it possible to obtain directly lactic acid with high selectivity while limiting the production of oligosaccharides and soluble polymers.

Process for converting cellulose or lignocellulosic biomass using stable non-zeolite solid Lewis acids based on tin or antimony alone or as a mixture

The invention relates to a process for transformation of lignoceliulosic biomass or cellulose that uses tungsten-oxide-based heterogeneous catalysts that are dispersed on an oxide-based substrate, preferably with a base of oxide(s) of aluminum and/or zirconium and/or titanium and/or niobium and containing an element in the particular metallic state. The use of these catalysts makes it possible to obtain directly upgradable products containing three carbon atoms, in particular hydroxyacetone and propylene glycol with high selectivity.

Process for transformation of lignocellulosic biomass or cellulose by tungsten-oxide-based solid lewis acid catalysts and a metal that is selected from groups 8 to 11

The invention relates to a process for transformation of lignocellulosic biomass or cellulose using heterogeneous catalysts that are based on tin oxide and/or antimony oxide, dispersed on a substrate and containing at least one element in the particular metal state. The use of these catalysts makes it possible to obtain directly upgradable products, in particular hydroxyacetone and propylene glycol with high selectivity.

Process for transformation of lignocellulosic biomass or cellulose by catalysts based on tin oxide and/or antimony oxide and a metal that is selected from the groups 8 to 11

The invention relates to a method of preparing a mixture of biofuels comprising fatty acid esters and at least one mixture of glycerol ethers from fatty substances that may contain free fatty acids and ethanol comprising: a) a step of transesterification of a vegetable or animal oil by ethanol in the presence of a catalyst based on at least one alkali metal salt or ammonium heteropolyacid salt characterized by differential heat of adsorption of ammonia which is greater than or equal to 150 kJ/mol, stable at T&#x3e;150.degree. C., in order to obtain fatty acid esters and glycerol, and, b) a step of etherification of the glycerol formed during step a) by the alcohol used in step a) in the presence of the catalyst from step a) in order to obtain at least one ether of the glycerol, said steps a) and b) taking place simultaneously, in one and the same reactor.

Method for preparing a mixture of biofuels

The invention relates to a process for transformation of lignocellulosic biomass or cellulose that uses tungsten-based heterogeneous catalysts that are dispersed on an oxide-based substrate, preferably with a base of oxide(s) of aluminum and/or zirconium and/or titanium and/or niobium. The use of these catalysts makes it possible to obtain directly lactic acid with high selectivity while limiting the production of oligosaccharides and soluble polymers.

Process for transformation of lignocellulosic biomass or cellulose by tungsten-based solid lewis acids

The invention concerns solids comprising a single tungsten oxide layer on a zirconia support and/or titanium dioxide support, characterized in that the tungsten exhibits tetrahedral co-ordination, before and after calcining. The invention also concerns the method for preparing the solids, and their uses as acid catalysis reactions catalyst.

Tungsten catalysts

The process for preparing a mercaptan from an olefin and hydrogen sulphide is carried out in the presence of hydrogen and a catalyst composition comprising a strong acid, such as a heteropolyacid, and at least one metal belonging to group VIII of the Periodic Table.

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Saint Just Chaleyssin, France

Nadine Essayem