Tuning the selectivity of benzene hydroalkylation over PdZn/HBeta catalysts: identification of lattice contraction and electronic properties

Abstract

One step hydroalkylation (HDA) of benzene to cyclohexylbenzene (CHB) is a tandem reaction with tremendous economic significance. Precisely regulating the density and diffusion of intermediate cyclohexene (CHE) is a key...

Metal–Acid Interface Engineering in Pd–WOx Bifunctional Catalysts for the Hydroalkylation Tandem Reaction of Benzene

“…Cyclohexylbenzene (CHB) is a significant chemical intermediate with an extensive range of applications in resins, lithium-ion batteries, and thin-film transistor liquid-crystal materials. − Moreover, the peroxidation of CHB provides an alternative for the manufacture of phenol, which can effectively resolve the excessive byproduct acetone conundrum in the cumene production. − Conventionally, CHB is obtained by the hydrogenation of benzene to cyclohexene (CHE) over metal catalysts followed by the alkylation of benzene with CHE in the presence of acidic catalyst. − This route suffers from unsatisfactory catalytic efficiency, environmental pollution, and equipment corrosion. , On the contrary, the one-step benzene hydroalkylation to CHB is considered as a promising alternative synthetic route because of its technological and scientific advances, including atom-efficient scenario, energy optimization, and overall process simplicity, whereas obtaining satisfactory productivity of CHB from the hydroalkylation of benzene is highly difficult because further hydrogenation of CHE to cyclohexane (CHA) is a competitive and nonignorable byreaction. , Therefore, the rational contrive and preparation of bifunctional catalysts with both hydrogenation and alkylation active sites toward the hydroalkylation tandem reaction are of crucial importance.…”