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| Titel: |
Redox Catalysis of Alkaline Pulping By Organometallic Complexes |
| Auteur: |
Wright, L. James Fullerton, Terry J. |
| Verschenen in: |
Journal of wood chemistry and technology |
| Paginering: | Jaargang 4 (1984) nr. 1 pagina's 61-74 |
| Jaar: |
1984-03-01 |
| Inhoud: |
The effectiveness of various metal ion complexes of mesotetra (p-sulphophenyl)porphyrin (TSPP) and 4, 4', 4'', 4'' -tetrasulphophthalocyanine (TSPc) as alternatives to anthraquinone (AQ) as catalysts of alkaline pulping have been evaluated. Using lignin model compounds two of the complexes, Co-TSPP and Fe-TSPc, were found to increase the amount of β-ether cleavage more than AQ. The yield of guaiacol was also increased significantly by increasing the amount of glucose in the controls. Evaluation of the potential of Co-TSPP as a catalyst for the soda pulping of Pinus radiata showed that the complex does promote delignification but not as well as AQ. As with the AQ the pulp yields were higher than the corresponding soda controls. The increased yields, the need for a reducing source, and the formation of vinylguaiacol as a co-product in the model compound studies indicate that the complexes may operate in a similar manner to AQ. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 8 van 9 gevonden artikelen
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