(535g) Production of Biorenewable Monomers - from Fructose to 2,5-Furandicarboxylic Acid
We will report a process for production of FDCA from fructose which utilizes a solvent system comprising of a polar aprotic solvent and water to address the aforementioned challenges. We will discuss the role of solvent in stabilizing HMF, thereby leading to high yield. In our process, a high concentration of fructose (15 wt%) is dehydrated to HMF, and HMF is then oxidized to FDCA over a heterogeneous catalyst (Pt/C) without intermediate separation. We demonstrate that the Î³-Valerolactone (GVL)/H2O solvent system has high FDCA solubility which not only leads to high FDCA yield but also eliminates the need of a homogeneous base during HMF oxidation. We further show that FDCA can be separated from the GVL/H2O solvent system by crystallization, and a highly pure (>99% purity) FDCA product is obtained. Furthermore, we demonstrate that FDCA is an effective catalyst for fructose dehydration in GVL/H2O, which obviates the need of a mineral acid catalyst, thereby improving both the economic and the environmental impact of the process. Our techno-economic model indicates that the overall process is economically competitive with current terephthalic acid processes.