Zeolite‐Supported Rhenium Catalysts for the Deoxydehydration of 1,2‐Hexanediol to 1‐Hexene

For the first time ammonium perrhenate (APR) supported on zeolites of the types H‐β, H‐ZSM‐5 and H−Y were shown to be efficient catalysts for the deoxydehydration (DODH). They catalyzed the transformation of 1,2‐hexanediol (1,2‐HDO) to 1‐hexene in the presence of 3‐octanol as reductant and solvent with productivities up to 0.24 mol1‐hexene ⋅ gRe−1 ⋅ h−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. Deoxydehydration: Ammonium perrhenate supported on different zeolites provides access to new efficient catalysts for deoxydehydration (DODH). Those with high Al content effectively catalyze the DODH of diols.