Paper making and fiber liberation – Processes and products – With measuring – inspecting and/or testing
Reexamination Certificate
2011-03-22
2011-03-22
Halpern, Mark (Department: 1741)
Paper making and fiber liberation
Processes and products
With measuring, inspecting and/or testing
C356S338000
Reexamination Certificate
active
07909963
ABSTRACT:
A method is provided for measuring hydrophobic contaminants distributed in paper pulp suspension. The method comprises: adding a fluorescent dye (18) to the paper pulp suspension (12) including fibers and hydrophobic contaminants, the dye (18) interacting with the hydrophobic contaminants of the paper pulp suspension (12); submitting the paper pulp suspension (12) including the fibers, the hydrophobic contaminants, and the dye (18) to light characterized by a wavelength exciting the dye (18) to produce light emission signals; and detecting the light emission signals and evaluating the signals to measure the hydrophobic contaminants.
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Degerth, et al., “Flow Cytometry for Rapid Characterization of Colloidal Particles of Various Types in Process Waters—MPK 05,” Laboratory of Forest Products Chemistry, Abo Akademi (Sep. 2001): pp. 1-15.
Lorencak, et al., “Cationic Polymer Additions Overcome Manufacturing Problems Caused by Resins and Mechanical Pulp Extractives,” BASF Corporation, Journal of Pulp and Paper Science: vol. 25 No. 1 (Jan. 1999): pp. 1-7.
Whitten, et al., “Use of a Solid-State Fluorometer for Surface Fluorescence Measurements in Pulping and Papermaking Systems,” Journal of Pulp and Paper Science, vol. 25 No. 1 (Jan. 1999): pp. 21-24.
Cascades Canada Inc.
Halpern Mark
Sutherland & Asbill & Brennan LLP
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