Selective Hydrodeoxygenation of Lignin-Derived Phenols to Cyclohexanols or Cyclohexanes over Magnetic CoNx@NC Catalysts under Mild Conditions
摘要:
The hydrodeoxygenation (HDO) of lignin derived phenols is important to produce the renewable biofuels. Herein, we reported a simple method to prepare magnetic nitrogen-doped carbon supported cobalt nitride catalysts (CoNx@NC) by copyrolysis of cellulose and cobalt nitrate under ammonia atmosphere. The catalysts were prepared at different temperatures and characterized by elemental analysis, atomic absorption spectroscopy (AAS), Brunauer-Emmett-Teller (BET) surface area analysis, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and temperature-programmed reduction (TPR). The CoNx@NC-650 (pyrolyzed at 650 degrees C) exhibited the best HDO activity for eugenol conversion among a series of Co-based catalysts. The yield of propylcyclohexanol from eugenol was >99.9% under 2 MPa H-2 at 200 degrees C for 2 h. Moreover, a high yield of propylcyclohexane (99.1%) could be achieved when the solid acid HZSM-5 was added to the reaction system. Other lignin-derived phenolic compounds were also investigated and the yield of alkanes was >90%. Based on the mechanism investigation, the catalyst demonstrated a high selectivity to cleave the C-aryl-OR bond under mild conditions.
Compounds that have agonist activity at one or more of the SlP receptors are provided. The compounds are sphingosine analogs that, after phosphorylation, can behave as agonists at SlP receptors.
[EN] INHIBITORS OF NOROVIRUS AND CORONAVIRUS REPLICATION<br/>[FR] INHIBITEURS DE LA RÉPLICATION DE NOROVIRUS ET DE CORONAVIRUS
申请人:COCRYSTAL PHARMA INC
公开号:WO2021206876A1
公开(公告)日:2021-10-14
Compounds of Formula (I) and methods of inhibiting the replication of viruses in a biological sample or patient, of reducing the amount of viruses in a biological sample or patient, and of treating a virus infection in a patient, comprising administering to said biological sample or patient an effective amount of a compound represented by Formula (I), a compound of Table A or B or a pharmaceutically acceptable salt thereof.
STABILIZER COMPOUND, LIQUID CRYSTAL COMPOSITION, AND DISPLAY ELEMENT
申请人:DIC CORPORATION
公开号:US20180230094A1
公开(公告)日:2018-08-16
The present invention provides a compound represented by General Formula (I). The compound according to the present invention prevents the liquid crystal composition from being deteriorated due to light, has high compatibility with the liquid crystal composition, and does not impair the storage stability of the liquid crystal composition, thus the compound is useful as a constituent member of a liquid crystal composition. Since the liquid crystal composition and the liquid crystal display element containing the compound of the present invention exhibit UV resistance and have a high VHR, it is possible to obtain a liquid crystal display element with excellent display quality in which display defects such as burn-in and display unevenness do not occur or are suppressed.
Fast pyrolysis of biomass for bio-oil production is a direct route to renewable liquid fuels, but raw bio-oil must be upgraded in order to remove easily polymerized compounds (such as phenols and furfurals). Herein, a synthesis strategy for graphene encapsulated Ru nanoparticles (NPs) on carbon sheets (denoted as Ru@G-CS) and their excellent performance for the upgrading of raw bio-oil were reported
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。