Selective hydrogenation of lignin-derived compounds under mild conditions
作者:Lu Chen、Antoine P. van Muyden、Xinjiang Cui、Gabor Laurenczy、Paul J. Dyson
DOI:10.1039/d0gc00121j
日期:——
processes used in their production. Here, we show that well-defined Rh nanoparticles dispersed in sub-micrometer size carbon hollow spheres, are able to hydrogenate lignin derived products undermildconditions (30 °C, 5 bar H2), in water. The optimum catalyst exhibits excellent selectivity and activity in the conversion of phenol to cyclohexanol and other related substrates including aryl ethers.
木质素衍生化学品生产中的关键挑战是减少其生产中使用的能源密集型过程。在这里,我们显示了分散在亚微米尺寸的碳空心球中的定义明确的Rh纳米粒子能够在温和条件下(30°C,5 bar H 2)在水中氢化木质素衍生产品。最佳催化剂在苯酚向环己醇和其他相关底物(包括芳基醚)的转化中表现出出色的选择性和活性。
[EN] 3'-KETOGLYCOSIDE COMPOUND FOR THE SLOW RELEASE OF A VOLATILE ALCOHOL<br/>[FR] COMPOSÉ 3'-CÉTOGLYCOSIDE POUR LA LIBÉRATION LENTE D'UN ALCOOL VOLATIL
申请人:GLYCOSCIENCE S L
公开号:WO2021160670A1
公开(公告)日:2021-08-19
The present invention relates to a 3'-ketoglycoside compound defined by formula (I) and its use for controlled release of alcohols, in particular alcohols showing an insect repellent effect. It relates also to a process for preparing the 3'-ketoglycoside compound of formula (I). It further relates to a composition comprising a 3'- ketoglycoside compound of formula (I). It relates also to the use of a 3'-ketoglycoside compound of formula (I) for the controlled release of alcohols. It related also to a method of use of such composition.
Hydrodeoxygenation of lignin-derived phenols into alkanes over carbon nanotube supported Ru catalysts in biphasic systems
作者:Meng-Yuan Chen、Yao-Bing Huang、Huan Pang、Xin-Xin Liu、Yao Fu
DOI:10.1039/c4gc01992j
日期:——
Lignin derived phenols and dimers were converted into alkanes through the HDO process over Ru/CNT catalysts in biphasic solvents.
木质素衍生的酚和二聚体在双相溶剂中通过Ru / CNT催化剂通过HDO工艺转化为烷烃。
Highly Efficient Cleavage of Ether Bonds in Lignin Models by Transfer Hydrogenolysis over Dual‐Functional Ruthenium/Montmorillonite
作者:Zhimin Xue、Haitao Yu、Jing He、Yibin Zhang、Xue Lan、Rundong Liu、Luyao Zhang、Tiancheng Mu
DOI:10.1002/cssc.202000978
日期:2020.9.7
studies reveal that the reaction proceeds through two possible reaction pathways, including the direct cleavage of ether bonds and the formation of intermediates with one hydrogenated benzene ring, for all examined types of ether bonds, namely, 4‐O‐5, α‐O‐4, and β‐O‐4.
Slowing the Kinetics of Alumina Sol-Gel Chemistry for Controlled Catalyst Overcoating and Improved Catalyst Stability and Selectivity
作者:Yuan-Peng Du、Florent Héroguel、Jeremy S. Luterbacher
DOI:10.1002/smll.201801733
日期:2018.8
agent or using nonhydrolytic sol–gel chemistry. These two approaches produce overcoats with similar chemical properties but distinct physical textures. With chelation chemistry, a mild method compatible with supported base metal catalysts, a conformal yet porous overcoat leads to a highly sintering‐resistant Cu catalyst for liquid‐phase furfural hydrogenation. With the nonhydrolytic sol–gel route, a
催化剂外涂层是一种新兴的方法,可设计负载金属催化剂上的表面官能度并提高催化剂的选择性和耐久性。由于铝醇盐前体的快速水解动力学,传统上很难通过溶胶-凝胶化学法在高表面积材料上沉积氧化铝。在这里,采用溶胶-凝胶化学方法可以减缓这些动力学并沉积纳米级氧化铝外涂层。氧化铝外涂层在保形性和厚度控制方面与通过原子层沉积制备的外涂层相当,即使在高表面积的基材上也是如此。该策略依赖于调节Al(s BuO)3的水解/冷凝动力学通过添加螯合剂或使用非水解溶胶-凝胶化学方法。这两种方法可生产出具有相似化学性质但物理纹理不同的外涂层。螯合化学是一种与负载型贱金属催化剂兼容的温和方法,其保形而又多孔的外涂层导致用于液相糠醛加氢的高度耐烧结的Cu催化剂。通过非水解溶胶-凝胶途径,可以沉积更致密的Al 2 O 3外涂层,以在介孔二氧化硅上的Pt上产生高密度的路易斯酸-金属界面位。所得材料具有显着提高的加氢脱氧活性,可将