Centre National De La Recherche Scientifique

Roquette Freres

Universite Claude Bernard – Lyon1

Université Claude Bernard Lyon I

Cyril Feche

Nadine Essayem

Mathias Ibert

Francois Figueras

Franck Rataboul

Stéphane Loridant

Rodrigo Lopes De Souza

Dilson Cardoso

Jorge Palomeque

Georges Gelbard

Demian Patrick Fabiano

Alain Perrard

Demian Fabiano

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 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

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

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Leyment, France

Cyril Feche