"Kappa" number calibration standard

Details "Kappa" number calibration standard "Kappa" number calibration standard

1991-05-02

1993-07-20

Housel, James C.

Chemistry: analytical and immunological testing

Composition for standardization, calibration, simulation,...

530502, G01N 3334

Patent

active

052292940

ABSTRACT:
Instruments for determining the degree of delignification corresponding to a sample of kraft or soda process digested wood pulp are calibrated with a predetermined quantity of refined lignin. For convenient use and application, a standardized solution comprising such refined lignin and an organic solvent such as ethylene glycol may be prepared for distribution to use points. Such standardized refined lignin, whether tested as a powdered solid or as a standardized solution yields a consistent "K" Number, "Permanganate" Number, "Kappa" Number or "Klason" Number value from standardized titration test procedures.

REFERENCES:
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patent: 4752357 (1988-06-01), Baker
patent: 4780182 (1988-10-01), Baker
Paulonis et al., Tappi Journal, 71 (11), pp. 185-187, 1988.
Kirk-Othmer, Encyclopedia of Chemical Technology 2nd Ed., pp. 361-381, 1967.
Michael A. Paulonis, "Kappa number and overall yield calculation based on digester liquor analysis," Nov., 1988 Tappi Journal, p. 184.

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