Polysulfide measurement methods using colormetric techniques

Details Polysulfide measurement methods using colormetric techniques Polysulfide measurement methods using colormetric techniques

2005-04-05

2005-04-05

Langel, Wayne A. (Department: 1754)

Chemistry of inorganic compounds

Sulfur or compound thereof

Binary compound

C162S030110, C423S566200

Reexamination Certificate

active

06875414

ABSTRACT:
Methods of converting a sulfide in a composition to polysulfide are described, one method comprising the steps of exposing the composition to conditions and for a time sufficient to cause conversion of at least a portion of the sulfide, to polysulfide to form a modified composition; and controlling the conversion to polysulfide by measuring a color parameter of the modified composition.

REFERENCES:
patent: 3470061 (1969-09-01), Barker
patent: 3890428 (1975-06-01), Jayawant
patent: 4024229 (1977-05-01), Smith et al.
patent: 4147612 (1979-04-01), Miasek et al.
patent: 4740473 (1988-04-01), Tomlin
patent: 4800279 (1989-01-01), Hieftje et al.
patent: 5075098 (1991-12-01), Bittner et al.
patent: 5082526 (1992-01-01), Dorris
patent: 5121337 (1992-06-01), Brown
patent: 5215865 (1993-06-01), Chen
patent: 5446681 (1995-08-01), Gethner et al.
patent: 5500085 (1996-03-01), Magnotta et al.
patent: 5616214 (1997-04-01), Leclerc
patent: 5624545 (1997-04-01), Landfors et al.
patent: 5755925 (1998-05-01), Michel et al.
patent: 6279733 (2001-08-01), Eltvedt
patent: 6337062 (2002-01-01), Akiba
patent: 212687 (1960-12-01), None
patent: 0514901 (1992-11-01), None
patent: WO8404552 (1984-11-01), None
patent: WO8404597 (1984-11-01), None
Casey, James P., Pulp and Paper Chemistry and Chemical Technology, 3rdEdition, p. 432, vol. 1, Wiley-Interscience Publication, John Wiley & Sons.
Watanabe, Keigo et al., “New Process of Producing Highly Concentrated Polysulfide Liquor by Electrolysis of White Liquor”, TAPPI 1999 Pulping Conference, vol. 1, pp. 397-405.
Lewis, Richard J., Hawley's Condensed Chemical Dictionary, 12thEdition, p. 941, Van Nostrand Reinhold, an International Thomson Publishing Company 1993.
Ruelle, Nathalie et al, “Cathodoluminescent Properties and Energy Transfer in Red Calcium Sulfide Phosphors”, J. Appl. Phys., Sep. 1992, vol. 31, Part 1, No. 9A, pp. 2786-2790.
Vasilyeva, I.G. et al, “Color and Chemical Heterogeneities of y-[Na]-Ce2S3 Solid Solutions”, Journal of Alloys and Compounds, 1998, vol. 268, p. 72-77.
Teder, Ants, “Spectrophotometric Determination of Polysulfide Excess Sulfur in Aqueous Solutions”, Svensk Papperstidning, No. 6, 31 Mars 1967.
Green, Robert P., “Introduction and Principals of Chemical Recovery”, Chemical Recovery in the Alkaline Pulping Processes, 1992, p. 3, 3rdEdition, TAPPI Press.
Teder, Ants., “The Spectra of green Sulfide and Polysulfide Solutions”, Svensk Papperstidning No. 11, 15 Juni 1968.
Kirk Othmer Encyclopedia of Chemical Technology, pp. 841-876, vol. 6, 4thEdition, Wiley-Interscience Publication, John Wiley & Sons.
“The Determination of Instrumental Color Differences”, Pulping and Paper Production, 97/98 Technical Information Papers, pp. 858-866, TIP 0804-04, TAPPI Press.

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