Determination of Lignin Distribution in Pulps by MIR ATR Spectroscopy, 2002 International Pulp Bleaching Conference Proceedings

Anna-Stiina Jääskeläinen, Mari Nuopponen, Patrik Axelsson, Mari Halttunen, Mia Löijä, and Tapani Vuorinen

Kappa number variation in pulp sheets was determined by MIR ATR spectroscopy. The effect of pulping and successive delignification and bleaching processes on the homogeneity of the laboratory pulps was evaluated. MIR ATR spectroscopy combined with the multivariate data analysis provides information on both the surface and bulk chemical structure of the fibres. The variation in the laboratory hardwood pulps was similar to that in the mill-scale hardwood pulp from the continuous digester. The kappa distribution of the softwood Super Batch mill pulp became more even after the oxygen delignification. In the case of the laboratory and mill-scale hardwood pulps, the distribution after the bleaching stages was as inhomogenous as after cook, although the average and measured kappa values were decreased. The inhomogeneous lignin distribution was not found to be responsible for the poor bleachability of the laboratory pulp.

Author: Jääskeläinen, A.-S.
Determination of Lignin Distribution in Pulps by MIR ATR Spe
Determination of Lignin Distribution in Pulps by MIR ATR Spectroscopy, 2002 International Pulp Bleaching Conference Proceedings
32.00

New Releases

TAPPI PRESS Catalog eBook 2024


Experience the Power of Publications in the 2024 TAPPI Press Catalog


Open


 

Kraft Recovery Boilers, Third Edition  


Sponsored by the Recovery Boiler Program R&D Subcommittee of the American Forest & Paper Association (AF&PA) and published by TAPPI Press.


Purchase


 

Handbook For Pulp and Paper Technologists (The SMOOK Book), Fourth Edition

The best-selling text to introduce the entire technology of pulp and paper manufacture.

Purchase

 

Guidelines for Safe Assessment and Operation of Yankee Dryers  


A project of the Yankee Dryer Safety & Reliability Committee.

Purchase

 

Check our newest additions.


TAPPI Press offers some of the most in-depth resources and references for the forest products and related industries. 

See More

   
 

Available for Purchase – Conference Proceedings


TAPPI maintains a record of key conference papers, presentations, and other conference publications, available for purchase in a variety of formats.

See More