Synthesis of cyclohexanol and ethanol via the hydrogenation of cyclohexyl acetate with Cu₂Zn_x/Al₂O₃ catalysts

Abstract

Cyclohexanol (CHOL), as a value-added chemical, has attracted much attention due to its huge application market. The hydrogenation of cyclohexyl acetate (CHA), derived from the esterification of acetic acid and...

Cr and Co-modified Cu/Al2O3 as an efficient catalyst for the continuous synthesis of bis(2-dimethylaminoethyl)ether

“…[57][58][59] The strong vibration peaks located at 1445, 1575 and 1610 cm −1 were attributed to the pyridine molecules adsorbed on Lewis acidic sites, which implied that the surface acidity of catalysts was mainly contributed by Lewis acidic sites. [59][60][61] In addition, the quantitative values of the Lewis acid sites and Brønsted acid sites are summarized in Table S3, † and these results are consistent with NH 3 -TPD analysis results.…”

Synthesis of bio-derived 1,4-butanediol by succinic acid esterification and hydrogenation over CuFeAl catalysts

“…As is well known, both Cu 0 and Cu + species participate in the hydrogenation of DMS to GBL and then to BDO cooperatively. [40][41][42][43][44][45][46][47][48][49] It is generally accepted that Cu 0 species activate hydrogen molecules while Cu + species would play a key role in activating DMS. Additionally, the deconvoluted Fe 2p 3/2 spectra of Cu 1 Fe 1 Al 0.5 indicate that there were Fe 3+ , Fe 2+ and Fe 0 species, respectively, in agreement with the XRD results (Fig.…”

Efficient hydrogenation of cyclohexyl acetate to cyclohexanol with Cu–Zr catalysts

“…Recently, the hydrogenation of acetic acid-derived cyclohexyl acetate (CHA) to yield CHOL with Cu-based catalysts has been proved be an alternative and effective route. [4][5][6][7][8] For instance, Zong and coworkers demonstrated a heterogeneous Cu 1 Zn 1 Si 2 La 0.1 catalyst, achieving 99.5% conversion and 99.7% selectivity to CHOL without deactivation during the 1000 h time-on-stream test. 4 Nevertheless, they did not detail the investigations about the affecting factors for the conversion of CHA and the selectivity to CHOL.…”