Surfactant-assisted synthesis of mesoporous hafnium- imidazoledicarboxylic acid hybrids for highly efficient hydrogen transfer of biomass-derived carboxides
Catalytic transferhydrogenations of biomass-derived carbonylcompounds to produce corresponding alcohols are important pathway for biomass transformation. Herein, a facile route was developed to synthesize the surfactant-assisted heterogeneous acid-base bifunctional 4,5-imidazoledicarboxylic acid-hafnium hybrid catalyst (Hf-H3IDC-T) by hydrothermal self-assembly method. The as-prepared Hf-H3IDC-T
furfural-diethyl-acetal (FDA), using ionic liquid tangled, sulphonic acid functionalized, porphyrin (ILSAFPc) as a photocatalyst under visiblelight at ambient conditions. The formation of FDA was achieved by reacting furfural and ethanol (1: 2.2) over ILSAFPc photocatalyst in a home-made photoreactor under 5 W LED light. The product was attained with 92% yield by photocatalytic acetalization in 18 h at room temperature
该协议介绍了糠醛 (FFL) 到糠醛二乙基缩醛 (FDA) 的转化, 使用离子液体缠结、磺酸功能化、卟啉 (ILSAFPc) 作为环境条件下可见光下的光催化剂。FDA的形成是通过在自制的光反应器中,在5 W LED灯下,通过ILSAFPc光催化剂反应糠醛和乙醇(1:2.2)来实现的。产物在室温下光催化缩醛化18 h,产率92%,经1 H NMR和13 C NMR证实。通过在1中存在 CH 单线态证实了缩醛H NMR,在 (8.08) ppm 和 CHO 质子在 18 小时时底物消失。此外,FDA 展示了一种出色的燃料添加剂,结果表明,与汽油混合 15% 和 20%(按体积计)发现了可比的物理化学性质,包括辛烷值和热值。最后,ILSAFPc 在优化条件下可重复使用六次,而产量和结构没有显着变化。 图形摘要
High Efficiency Catalytic Transfer Hydrogenation of Furfural to Furfuryl Alcohol Over Metallic Oxide Catalyst
作者:Zonghui Liu、Zhongze Zhang、Zhe Wen、Bing Xue
DOI:10.1007/s10562-022-03924-5
日期:2022.12
Development of simple and high performance solid catalysts for the utilization of biomass has become an important research topic in heterogeneous catalysis and sustainable chemistry. Herein, a highly efficient catalytic system was studied for the catalytictransferhydrogenation of furfural to high value furfuryl alcohol over a series of acidic or basic oxides catalysts. Among those oxides, acidic Al2O3 is identified
开发用于生物质利用的简单而高性能的固体催化剂已成为多相催化和可持续化学的重要研究课题。在此,研究了在一系列酸性或碱性氧化物催化剂上将糠醛催化转移加氢为高价值糠醇的高效催化体系。在这些氧化物中,酸性 Al 2 O 3被认为对 FAL 生产最有效,其 FUR 转化率高达 40%(FUR 消耗率为 186 mmol g cat -1 h -1)和 99% 的 FAL 选择性。使用 2-丙醇作为 H 供体和溶剂,在 150 °C 下仅需 5 分钟。此外,所制备的 Al 2 O 3给出的 Ea 值为 15.2 kJ/mol,远低于文献中的其他络合催化剂。将催化剂性能与其物理和化学性质相关联表明,Al 2 O 3的大比表面积和高酸性将是催化剂性能的关键。 图形概要
Highly selective synthesis under benign reaction conditions of furfural dialkyl acetal using SnCl<sub>2</sub> as a recyclable catalyst
作者:Márcio José da Silva、Milena Galdino Teixeira、Ricardo Natalino
DOI:10.1039/c9nj01284b
日期:——
and mild reaction conditions (i.e., roomtemperature, without solvent, recyclablecatalyst), achieving a very good selectivity (97–100%) and almost complete conversion of furfural. Various tin(II) salts were used as catalysts for the upgrading of furfural to alkyl acetal in an alcoholic solution at roomtemperature. SnCl2 was the most active and selective catalyst toward furfural diethyl acetal. Tin(II)
Metal-exchanged magnetic β-zeolites: valorization of lignocellulosic biomass-derived compounds to platform chemicals
作者:Erlen Y. C. Jorge、Thiago de M. Lima、Carolina G. S. Lima、Lucas Marchini、William N. Castelblanco、Daniel G. Rivera、Ernesto A. Urquieta-González、Rajender S. Varma、Márcio W. Paixão
DOI:10.1039/c7gc01178d
日期:——
magnetically recoverable β-zeolites exchanged with late transition metals (Pd, Fe and Ir) have been synthesized and fully characterized and had their catalytic activity evaluated on the conversion of several bio-derived compounds to other value-added platform chemicals. The nature of the transition metals exchanged in the zeolite matrix and the significant effect of reaction conditions such as temperature