A multicentre synergistic polyoxometalate-based metal–organic framework for one-step selective oxidative cleavage of β-O-4 lignin model compounds

2020 ◽  
Vol 22 (1) ◽  
pp. 248-255 ◽  
Author(s):  
Hong-Rui Tian ◽  
Yi-Wei Liu ◽  
Zhong Zhang ◽  
Shu-Mei Liu ◽  
Tian-Yi Dang ◽  
...  

NENU-MV-5 as a heterogeneous catalyst without any co-catalyst, one-step selective oxidative cleavage of lignin models to high-value-added aromatics in a single solvent was achieved by synergistic effect of VIV–O–VV and CuI using O2 as oxidant.

2019 ◽  
Vol 21 (8) ◽  
pp. 1974-1981 ◽  
Author(s):  
Sijie Liu ◽  
Lichen Bai ◽  
Antoine P. van Muyden ◽  
Zhangjun Huang ◽  
Xinjiang Cui ◽  
...  

Single-atom catalysts are emerging as primary catalysts for many reactions due to their 100% utilization of active metal centers leading to high catalytic efficiencies.


2020 ◽  
Vol 16 ◽  
Author(s):  
Mahdieh Sharifi ◽  
Ramyakrishna Pothu ◽  
Rajender Boddula ◽  
Inamuddin

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.


2021 ◽  
Author(s):  
Guangyong Liu ◽  
Qian Wang ◽  
Dongxia Yan ◽  
Yaqin Zhang ◽  
Chenlu Wang ◽  
...  

Cleavage of aryl ether (Caryl-O) bonds is crucial for conversion and value-added utilization of lignin and its derivatives, but remains extremely challenging under mild conditions due to strong Caryl-O linkages....


2019 ◽  
Vol 55 (95) ◽  
pp. 14347-14350 ◽  
Author(s):  
Dingxuan Ma ◽  
Yaowen Zhang ◽  
Shaoshao Jiao ◽  
Jixin Li ◽  
Kang Liu ◽  
...  

A novel tri-functional MOF catalyst was achieved by PSM method. Because of the synergistic effect of Lewis acid, Brønsted acid and Br− anion, MIL-IMAc-Br− displayed an efficient catalytic performance for CO2 conversion.


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