skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Method for rapidly determining a pulp kappa number using spectrophotometry

Abstract

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.

Inventors:
 [1];  [2]
  1. (Atlanta, GA)
  2. (Marietta, GA)
Issue Date:
Research Org.:
Inst. of Paper Science and Technology, Atlanta, GA (US)
OSTI Identifier:
874855
Patent Number(s):
6475339
Assignee:
lnstitute of Paper Science and Technology, Inc (Atlanta, GA) IDO
DOE Contract Number:  
FC07-96ID13438
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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; /162/356/

Citation Formats

Chai, Xin-Sheng, and Zhu, Jun Yong. Method for rapidly determining a pulp kappa number using spectrophotometry. United States: N. p., 2002. Web.
Chai, Xin-Sheng, & Zhu, Jun Yong. Method for rapidly determining a pulp kappa number using spectrophotometry. United States.
Chai, Xin-Sheng, and Zhu, Jun Yong. Tue . "Method for rapidly determining a pulp kappa number using spectrophotometry". United States. https://www.osti.gov/servlets/purl/874855.
@article{osti_874855,
title = {Method for rapidly determining a pulp kappa number using spectrophotometry},
author = {Chai, Xin-Sheng and Zhu, Jun Yong},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

Save / Share: