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The effect of digester kappa on the bleachability and yield of EMCCTM softwood pulp.


APPLICATION: A recovery boiler-limited mill seeking higher fiberline production can use this work to justify running a higher digester di·gest·er  
n.
1. One that makes a digest.

2. Chemistry A vessel in which substances are softened or decomposed, usually for further processing.

Noun 1.
 kappa Kappa

Used in regression analysis, Kappa represents the ratio of the dollar price change in the price of an option to a 1% change in the expected price volatility.

Notes:
Remember, the price of the option increases simultaneously with the volatility.
, even at a high final brightness target.

The purpose of this work is to determine the effect of brownstock kappa on the bleachability of softwood softwood

Timber obtained from coniferous trees (mainly of the pine and fir families). With the exception of bald cypress, tamarack, and larch, softwood trees are evergreens.
 EMCC EMCC

See Emerging Markets Clearing Corporation (EMCC).
 kraft pulp. We conducted a laboratory bleaching simulation of nine softwood pulp furnishes covering a range of kappa numbers from 12.5 to 33.5. All pulps except one were produced by lab simulation of EMCC pulping. We successfully modeled the response of screened yield to digester kappa based upon this work. The bleachability of the pulp was then modeled based upon the lab bleaching.
COPYRIGHT 2006 Paper Industry Management Association
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2006, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

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Title Annotation:BLEACHING
Author:Connell, Daniel
Publication:Solutions - for People, Processes and Paper
Date:Apr 1, 2006
Words:111
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