Centre National De La Recherche Scientifique

Université Claude Bernard Lyon I

Universite Claude Bernard – Lyon1

Rodrigo Lopes De Souza

Nadine Essayem

Franck Rataboul

Cyril Feche

Gilbert Sapaly

Dilson Cardoso

Demian Patrick Fabiano

Berna Hamad

Paulo Gustaro Pries De Oliveira

Wilma Gonzalez

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

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 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

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Rio de Janeiro, Brazil

Rodrigo Lopes De Souza