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Organochlorine Formation in Tertiary Amine Catalyzed Pulp Bleaching.

Authors :
Kumar Chenna, Naveen
Piovano, Pablo
Järnefelt, Christian
Vuorinen, Tapani
Source :
Journal of Wood Chemistry & Technology. 2016, Vol. 36 Issue 5, p318-328. 11p.
Publication Year :
2016

Abstract

An oxygen delignified eucalyptus kraft pulp was bleached by applying a catalytic amount of a tertiary amine, 1,4-diazabicyclo[2,2,2]octane, and hypochlorous acid at varying pH, temperature, and time. The bleaching filtrate was analyzed for chloroform and AOX and the pulp for residual lignin, hexenuronic acid, and OX. In comparison with chlorine dioxide bleaching, the novel catalytic bleaching (pH < 6) generated only traces of chloroform and low contents of AOX and OX. Separate catalytic oxidations of authentic hexenuronic acid showed that it was a major precursor of chloroform. The results demonstrate a practical way to reduce organochlorine formation in pulp bleaching and provide new understanding on the reaction pathways that yield chloroform. [ABSTRACT FROM PUBLISHER]

Details

Language :
English
ISSN :
02773813
Volume :
36
Issue :
5
Database :
Academic Search Index
Journal :
Journal of Wood Chemistry & Technology
Publication Type :
Academic Journal
Accession number :
116270033
Full Text :
https://doi.org/10.1080/02773813.2016.1148166