"Kappa" number calibration standard

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

1989-07-10

1993-03-16

Housel, James C.

Chemistry: analytical and immunological testing

Composition for standardization, calibration, simulation,...

162 72, G01N 3100, D21C 320

Patent

active

051943883

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:
patent: 3674434 (1972-07-01), Pottenger
patent: 4345913 (1982-08-01), Jonsson
patent: 4540468 (1985-09-01), Genco et al.
patent: 4743339 (1988-05-01), Faix et al.
patent: 4746401 (1988-05-01), Roberts et al.
patent: 4752357 (1988-06-01), Baker
patent: 4780182 (1988-10-01), Baker
Fisher '86 catalog pp. 1168,1166.
Michael A. Paulonis, "Kappa number and overall yield calculation based on digester liquor analysis," Nov., 1988 Tappi Journal, p. 184.

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