Application of zeolite-encapsulated Cu(ii) [H4]salen derived from [H2]salen in oxidative delignification of pulp

RSC Advances ◽  
2014 ◽  
Vol 4 (53) ◽  
pp. 28029 ◽  
Author(s):  
Xue-Fei Zhou
Keyword(s):  
Oxidative Delignification

Cell wall-associated transition metals improve alkaline-oxidative pretreatment in diverse hardwoods

2016 ◽  
Vol 18 (5) ◽  
pp. 1405-1415 ◽  
Author(s):  
Namita Bansal ◽  
Aditya Bhalla ◽  
Sivakumar Pattathil ◽  
Sara L. Adelman ◽  
Michael G. Hahn ◽  
...  
Keyword(s):  
Cell Wall ◽  
Transition Metals ◽  
Critical Role ◽  
Redox Active ◽  
Active Transition ◽  
Oxidative Delignification

Cell wall-associated, redox-active transition metals play a critical role in the efficacy of oxidative delignification.

Oxidative delignification in the presence of molybdovanadophosphate heteropolyanions: mechanism and kinetic studies

1998 ◽  
Vol 167 (1) ◽  
pp. 123-139 ◽  
Author(s):  
D.V. Evtuguin ◽  
C. Pascoal Neto ◽  
J. Rocha ◽  
J.D. Pedrosa de Jesus
Keyword(s):  
Kinetic Studies ◽  
Oxidative Delignification

scholarly journals Chemical and structural changes associated with Cu-catalyzed alkaline-oxidative delignification of hybrid poplar

2015 ◽  
Vol 8 (1) ◽  
Author(s):  
Zhenglun Li ◽  
Namita Bansal ◽  
Ali Azarpira ◽  
Aditya Bhalla ◽  
Charles H Chen ◽  
...  
Keyword(s):  
Structural Changes ◽  
Hybrid Poplar ◽  
Oxidative Delignification

Lignin Degradation in Oxygen Delignification Catalysed by [PMo7V5O40]8- Polyanion. Part I. Study on Wood Lignin

Holzforschung ◽  
2000 ◽  
Vol 54 (4) ◽  
pp. 381-389 ◽  
Author(s):  
D.V. Evtuguin ◽  
C. Pascoal Neto ◽  
J. Rocha
Keyword(s):  
13C Nmr Spectroscopy ◽  
Low Molecular Weight ◽  
Reaction Products ◽  
Oxygen Delignification ◽  
Wood Residue ◽  
Wet Chemistry ◽  
Acid Catalysed Reactions ◽  
A Minor ◽  
Oxidative Delignification ◽  
Competing Reactions

Summary The behaviour of lignin in wood delignification by oxygen in acidic media in the presence of the molybdovanadophosphate heteropolyanion [PMO7V5O40]8−as studied using wet chemistry methods, solid and liquid state 13C NMR spectroscopy. Lignin is oxidised by [PMO7V5O40]8− almost completely to carbon dioxide, with a minor yield of intermediate low-molecular weight aromatic products. The analysis of the reaction products shows that the lignin acidolysis and homolysis involving the oxygen participation in oxidation take place. The residual lignin in the wood residue is more “condensed” and richer in guaiacyl structural units than that in the initial wood. The analysis of “condensed” structures issued from permanganate oxidation of residual lignins suggests that these are formed predominantly by acid-catalysed reactions. The use of an organic solvent, such as ethanol, in the pulping solution favours the oxidative delignification, protecting the lignin against competing reactions (condensation).

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