Exothermic heat as a means of determining the degree of delignif

Details Exothermic heat as a means of determining the degree of delignif Exothermic heat as a means of determining the degree of delignif

1977-07-07

1979-07-31

Corbin, Arthur L.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Continuous chemical treatment or continuous charging or...

232303, 73 15R, 73 32R, 73190R, 73190H, 73190CV, 162 49, 162 61, 162DIG10, D21C 324

Patent

active

041629337

ABSTRACT:
A process for continuously digesting cellulosic fibrous material wherein the degree of delignification of the cellulosic fibrous material in the digestion zone is continuously determined and monitored by determining the exothermic heat of the delignification reaction taking place in the digester. The exothermic heat of the delignification reaction is determined by measurements of the temperature rise occurring in the delignification zone and the heat capacity of the cellulosic material and digesting liquor.

REFERENCES:
patent: 1831206 (1931-11-01), Swanson et al.
patent: 2395357 (1946-02-01), Trawick
patent: 2858213 (1958-10-01), Durant et al.
patent: 3085624 (1963-04-01), Horstman
patent: 3802956 (1974-04-01), Backlund
Boozer et al., "Automatic Control of a Kraft Continuous Digester", Paper Trade Journal, 6-11-62, pp. 42-46.
Grant, "Computer Applications: Woodlands Through Bleach Plant-II", Paper Trade Journal 6-21-71, pp. 36-41.
MacLoed, "Autocook System Brings Full Automation to Batch Digesters", Paper Trade Journal, 8-16-71, pp. 36-39.
Morrison, "Changes in Kraft Continuous Digester Instrumentation", Paper Trade Journal, 9-14-64, pp. 47-51.
Hubbe, "Digester Problem Statement", Tappi Journal, 5-1966, vol. 49, No. 5, pp. 61A-69A.

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