Last modified: 2018-08-01
Abstract
5-Hydroxymethylfurfural (HMF) is an organic compound derived in particular from sugars such as fructose and glucose. It consists of a furan heterocycle and has two functional groups, one aldehyde and the other alcoholic. The oxidation of 5-HMF is a very important reaction; it leads to the formation of many compounds considered as platform molecules with commercial and technical potential very interesting. Among these compounds, there is 2,5-furan dicarboxylic acid (FDCA), which results from the oxidation of the functions aldehyde and primary alcohol of 5-HMF in carboxylic acid functions.
We have studied the oxidation of HMF in FDCA in liquid phase on catalysts based on gold nanoparticles supported on hydrotalcites of MgAl type, prepared by deposition-precipitation. Different Mg / Al ratios were used for the preparation of the support.
After being assured of the support inactivity alone in the oxidation of HMF at 90 ° C, we studied the properties of the 2% Au / hydrotalcite catalysts. These catalysts allowed us to obtain excellent conversion and selectivity with better activity obtained on the hydrotalcite-supported gold catalyst prepared with an Mg / Al ratio of 2. The catalysts were characterized by DRX, BET and TGA