Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With testing – sampling or analyzing
Patent
1986-07-25
1988-05-10
Alvo, Steve
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With testing, sampling or analyzing
162 61, D21C 712
Patent
active
047433396
ABSTRACT:
A method is described for controlling the cooking degree of pulp during pulp digestion and for analyzing cooking chemical composition and -concentration before and during cooking operation. The method is based on the continuous or discontinuous monitoring of the IR spectroscopical behavior of the cooking liquor. Evaluated IR-spectal 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 existing control methods.
REFERENCES:
patent: 4540468 (1985-09-01), Genco et al.
Tikka et al., "A New Kraft Pulping Analyzer for Monitoring Organic and Organic Substances", Tappi Journal, Jun. 1986; published 1985 Pulping Conf. Proceedings.
Perry's Chemical Engineering Handbook, 4th Ed., Perry et al., ed.; New York, 1963, Chapt. 2-75.
Faix Oskar
Patt Rudolf
Welkener Ulrich
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