摘要:
The present invention relates to a method for synthesising a composition including at least one biomass-derived acid ester and an organic biosolvent. The method includes an esterification reaction between at least one biomass-derived acid and at least one alcohol in the presence of an acid catalyst and the organic biosolvent, said organic biosolvent being selective in relation to the ester(s) formed relative to the starting acid(s) and being immiscible with the alcoholic solution of the biomass-derived acid.
摘要:
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 absorption of ammonia which is greater than or equal to 150 kJ/mol, stable at T>150° 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.