Method for cooking control of lignocelluloses by ftir...

Details Method for cooking control of lignocelluloses by ftir... Method for cooking control of lignocelluloses by ftir...

G - Physics

01

N

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G01N 21/35 (2006.01) D21C 3/22 (2006.01) D21D 1/00 (2006.01) D21F 1/00 (2006.01) G01N 33/34 (2006.01)

Patent

CA 1277110

METHOD FOR COOKING CONTROL OF LIGNOCELLULOSES BY FTIR SPECTROSCOPY ABSTRACT A method is described for controlling the cooking degree of pulp during pulp digestion and for analyzing cooking chemi- cal composition and -concentration before and during cooking operation. The method is based on the continuous or discon- tinuous monitoring of the IR spectroscopical behavior of the cooking liquor. Evaluated IR-spectral data of cooking liquor samples are correlated with analytical data of the cooking liquor on the one hand and the resulting pulp on the other hand by means of adequate mathematical/statistical methods. A feedback of analytical data is performed to improve the statistical relevance of the method. The invention provides a method for cooking control which is much more accurate and faster than exiting control methods.

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