DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Simultaneous and rapid determination of multiple component concentrations in a Kraft liquor process stream

Abstract

The present invention is a rapid method of determining the concentration of the major components in a chemical stream. The present invention is also a simple, low cost, device of determining the in-situ concentration of the major components in a chemical stream. In particular, the present invention provides a useful method for simultaneously determining the concentrations of sodium hydroxide, sodium sulfide and sodium carbonate in aqueous kraft pulping liquors through use of an attenuated total reflectance (ATR) tunnel flow cell or optical probe capable of producing a ultraviolet absorbency spectrum over a wavelength of 190 to 300 nm. In addition, the present invention eliminates the need for manual sampling and dilution previously required to generate analyzable samples. The inventive method can be used in Kraft pulping operations to control white liquor causticizing efficiency, sulfate reduction efficiency in green liquor, oxidation efficiency for oxidized white liquor and the active and effective alkali charge to kraft pulping operations.

Inventors:
 [1];  [2];  [1]
  1. Marietta, GA
  2. Atlanta, GA
Issue Date:
Research Org.:
Lake County Sanitation District, Lakeport, CA (United States)
Sponsoring Org.:
USDOE Assistant Secretary for Energy Efficiency and Renewable Energy (EE)
OSTI Identifier:
982354
Patent Number(s):
7390669
Application Number:
10/999,912
Assignee:
Georgia Tech Research Corporation (Atlanta, GA)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
FG07-96ID13428
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Li, Jian, Chai, Xin Sheng, and Zhu, Junyoung. Simultaneous and rapid determination of multiple component concentrations in a Kraft liquor process stream. United States: N. p., 2008. Web.
Li, Jian, Chai, Xin Sheng, & Zhu, Junyoung. Simultaneous and rapid determination of multiple component concentrations in a Kraft liquor process stream. United States.
Li, Jian, Chai, Xin Sheng, and Zhu, Junyoung. Tue . "Simultaneous and rapid determination of multiple component concentrations in a Kraft liquor process stream". United States. https://www.osti.gov/servlets/purl/982354.
@article{osti_982354,
title = {Simultaneous and rapid determination of multiple component concentrations in a Kraft liquor process stream},
author = {Li, Jian and Chai, Xin Sheng and Zhu, Junyoung},
abstractNote = {The present invention is a rapid method of determining the concentration of the major components in a chemical stream. The present invention is also a simple, low cost, device of determining the in-situ concentration of the major components in a chemical stream. In particular, the present invention provides a useful method for simultaneously determining the concentrations of sodium hydroxide, sodium sulfide and sodium carbonate in aqueous kraft pulping liquors through use of an attenuated total reflectance (ATR) tunnel flow cell or optical probe capable of producing a ultraviolet absorbency spectrum over a wavelength of 190 to 300 nm. In addition, the present invention eliminates the need for manual sampling and dilution previously required to generate analyzable samples. The inventive method can be used in Kraft pulping operations to control white liquor causticizing efficiency, sulfate reduction efficiency in green liquor, oxidation efficiency for oxidized white liquor and the active and effective alkali charge to kraft pulping operations.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {6}
}

Works referenced in this record:

The optical absorption of hydroxyl ions associated with divalent calcium in NaCl
journal, May 1969


Spectrophotometric in-line monitoring of the electrochemical production of polysulfides using an ATR-probe
journal, July 1998


Advanced Process Control Minimizes Kraft Mill Effluents
journal, January 1977


Police and society
journal, January 1993


Ménages et familles dans les recensements
journal, January 1974


ATR technique for UV/VIS analytical measurements
journal, January 1987


Determination of inorganic anions in Kraft pulping liquors by capillary electrophoresis
journal, March 1996