Method for rapidly determining a pulp kappa number using spectrophotometry

Patent · Tue Jan 01 00:00:00 EST 2002

OSTI ID:874855

Chai, Xin-Sheng ^[1]; Zhu, Jun Yong ^[2]

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1. Atlanta, GA
2. Marietta, GA

A system and method for rapidly determining the pulp kappa number through direct measurement of the potassium permanganate concentration in a pulp-permanganate solution using spectrophotometry. Specifically, the present invention uses strong acidification to carry out the pulp-permanganate oxidation reaction in the pulp-permanganate solution to prevent the precipitation of manganese dioxide (MnO.sub.2). Consequently, spectral interference from the precipitated MnO.sub.2 is eliminated and the oxidation reaction becomes dominant. The spectral intensity of the oxidation reaction is then analyzed to determine the pulp kappa number.

• Research Organization: Inst. of Paper Science and Technology, Atlanta, GA (US)
• DOE Contract Number: FC07-96ID13438
• Assignee: lnstitute of Paper Science and Technology, Inc (Atlanta, GA)
• Patent Number(s): US 6475339
• OSTI ID: 874855
• Country of Publication: United States
• Language: English

Related Subjects

method
rapidly
determining
pulp
kappa
spectrophotometry
direct
measurement
potassium
permanganate
concentration
pulp-permanganate
solution
specifically
strong
acidification
carry
oxidation
reaction
prevent
precipitation
manganese
dioxide
mnosub2
consequently
spectral
interference
precipitated
eliminated
dominant
intensity
analyzed
determine
oxidation reaction
direct measurement
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