In situ spectroscopic investigation of the cobalt-catalyzed oxidation of lignin model compounds in ionic liquids

2011 ◽  
Vol 13 (3) ◽  
pp. 671 ◽  
Author(s):  
Joseph Zakzeski ◽  
Pieter C. A. Bruijnincx ◽  
Bert M. Weckhuysen
Keyword(s):  
Ionic Liquids ◽  
Spectroscopic Investigation ◽  
Model Compounds ◽  
Lignin Model Compounds ◽  
Lignin Model ◽  
Catalyzed Oxidation

Lignin to Value-Added Chemical Synthesis

2020 ◽  
Vol 16 ◽  
Author(s):  
Mahdieh Sharifi ◽  
Ramyakrishna Pothu ◽  
Rajender Boddula ◽  
Inamuddin
Keyword(s):  
Ionic Liquids ◽  
Lignocellulosic Biomass ◽  
Academic Research ◽  
Power Saving ◽  
Value Added ◽  
Glycerol Ether ◽  
Model Compounds ◽  
Lignin Model Compounds ◽  
Biomass Activity ◽  
Lignin Model

Background: There is a developing demand for innovation in petroleum systems replacements. Towards this aim, lignocellulosic biomass suggested as a possible sustainable source for the manufacturing of fuels and produced chemicals. The aims of this paper are to investigate different kinds of β-O-4 lignin model compounds for the production of value-added chemicals in presence of ionic liquids. Especially, a cheap β-O-4 lignin model Guaiacol glycerol ether (GGE) (Guaifenesin) is introduced to produce valuable chemicals and novel products. Methods: Research related to chemical depolymerization of lignocellulosic biomass activity is reviewed, the notes from different methods such as thermal and microwave collected during at least 10 years. So, this collection provides a good source for academic research and it gives an efficient strategy for the manufacturing of novel value-added chemicals at an industrial scale. Results: This research presented that ionic liquid microwave-assisted is a power saving, cost efficient, fast reaction, and clean way with high selectively and purity for production of high value chemicals rather that conversional heating. Guaiacol and catechol are some of these valuable chemicals that is produced from β-O-4 lignin model compounds with high word demands that are capable to produce in industry scale. Conclusion: The β-O-4 lignin model compounds such as Guaiacol glycerol ether (GGE) (Guaifenesin) are good platform for developing food materials, perfumery, biorefinery, and pharmaceutical industry by ionic liquids-assisted lignin depolymerization method.

The selective hydrogenolysis of C–O bonds in lignin model compounds by Pd–Ni bimetallic nanoparticles in ionic liquids

2017 ◽  
Vol 46 (35) ◽  
pp. 11884-11889 ◽  
Author(s):  
Kang-kang Sun ◽  
Guo-ping Lu ◽  
Jia-wei Zhang ◽  
Chun Cai
Keyword(s):  
Ionic Liquids ◽  
Bimetallic Nanoparticles ◽  
Ambient Pressure ◽  
Hydrogen Gas ◽  
Hydrogen Donor ◽  
Model Compounds ◽  
Lignin Model Compounds ◽  
Selective Hydrogenolysis ◽  
Lignin Model ◽  
Neutral Conditions

β-O-4 and α-O-4 linkages can be selectively cleaved by Pd–Ni bimetallic nanoparticles in ionic liquids using hydrogen gas as the hydrogen donor under ambient pressure and neutral conditions.

Ionic liquid [OMIm][OAc] directly inducing oxidation cleavage of the β-O-4 bond of lignin model compounds

2017 ◽  
Vol 53 (63) ◽  
pp. 8850-8853 ◽  
Author(s):  
Yingying Yang ◽  
Honglei Fan ◽  
Qinglei Meng ◽  
Zhaofu Zhang ◽  
Guanying Yang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Aromatic Compounds ◽  
Aerobic Oxidation ◽  
Model Compounds ◽  
Lignin Model Compounds ◽  
Metal Free ◽  
Lignin Model

Ionic liquids can effectively induce the transformation of lignin model compounds into aromatic compounds by aerobic oxidation under metal-free conditions.

Iron porphyrin catalyzed oxidation of lignin model compounds: oxidation of phenylpropane and phenylpropene model compounds

1995 ◽  
Vol 73 (12) ◽  
pp. 2153-2157 ◽  
Author(s):  
Futong Cui ◽  
David Dolphin
Keyword(s):  
Iron Chloride ◽  
Ring Cleavage ◽  
Iron Porphyrin ◽  
Model Compounds ◽  
Lignin Model Compounds ◽  
Aqueous Acetonitrile ◽  
Tert Butylhydroperoxide ◽  
Lignin Model ◽  
Aromatic Ring Cleavage ◽  
Catalyzed Oxidation

The oxidation of 1-(4-ethoxy-3-methoxyphenyl)propane (2) and 1-(4-ethoxy-3-methoxyphenyl)propene (3) by meso-tetra(2,6-dichloro-3-sulphonatophenyl)porphyrin iron chloride (TDCSPPFeCl, 1) and tert-butylhydroperoxide (t-BuOOH) are discussed. In addition to a Cα-hydroxylation product, demethoxylation and direct aromatic ring cleavage products were found in the oxidation of 2. When 3 was oxidized by 1 and t-BuOOH in aqueous acetonitrile, an acetonitrile-incorporated product was found. A mechanism for the oxidation of 3 is proposed. Keywords: lignin, ligninase, iron porphyrin, model, degradation.

Conversion of lignin model compounds under mild conditions in pseudo-homogeneous systems

2016 ◽  
Vol 18 (8) ◽  
pp. 2341-2352 ◽  
Author(s):  
Lu Chen ◽  
Jiayu Xin ◽  
Lingli Ni ◽  
Huixian Dong ◽  
Dongxia Yan ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Metal Nanoparticles ◽  
Noble Metal ◽  
Catalyst System ◽  
Noble Metal Nanoparticles ◽  
Homogeneous Catalyst ◽  
Model Compounds ◽  
Lignin Model Compounds ◽  
Mild Conditions ◽  
Lignin Model

A novel pseudo-homogeneous catalyst system consisting of noble metal nanoparticles and ionic liquids is developed for the selective reductive cleavage of C–O and hydrodeoxygenation under mild conditions.

Microwave-Assisted Degradation of Lignin Model Compounds in Imidazolium-Based Ionic Liquids

2014 ◽  
Vol 28 (2) ◽  
pp. 1380-1386 ◽  
Author(s):  
Jingying Pan ◽  
Jie Fu ◽  
Shuguang Deng ◽  
Xiuyang Lu
Keyword(s):  
Ionic Liquids ◽  
Model Compounds ◽  
Lignin Model Compounds ◽  
Microwave Assisted ◽  
Lignin Model
Sign in / Sign up

Export Citation Format

Share Document