Efficient deoxygenation strategies are crucial for the valorization of renewable feedstocks. Deoxydehydration (DODH) enables the direct transformation of two adjacent hydroxyl groups into a double bond. Supported molybdenum-based catalysts were utilized for the first time in DODH. MoO /TiO showed superior catalytic activity compared to common molybdenum salts. The catalyst efficiently converted 1,4-anhydroerythritol into 2,5-dihydrofuran in the presence of 3-octanol as reducing agent, showing high reproducibility and stability.

MEINERS, I.; DOMINGUEZ DE MARIA*, P.; RSC Adv. 4 (2014) 86, 46097-46101, http://dx.doi.org/10.1039/C4RA09307K ; Inst. Tech. Chem. Makromol. Chem., RWTH Aachen, D-52074 Aachen, Germany; Eng.) -M. Tismer 13-098

For the first time ammonium perrhenate (APR) supported on zeolites of the types H-β, H-ZSM-5 and HÀ Y were shown to be efficient catalysts for the deoxydehydration (DODH). They catalyzed the transformation of 1,2-hexanediol (1,2-HDO) to 1hexene in the presence of 3-octanol as reductant and solvent with productivities up to 0.24 mol 1-hexene • g Re À 1 • h À 1 . The productivity decreased with increasing Si : Al ratio, independent of the zeolite structure. Catalyst characterization indicates Re-species to preferably bind to the Al centers of the support, resulting in a higher amount of active metal centers.

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