Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1982-11-01
1984-06-12
Phillips, Delbert R.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
C07G 100
Patent
active
044540663
ABSTRACT:
Sulfonated lignin and lignosulfonate color reductions of over 90 percent, and in some cases as high as 95 percent, are achieved by a two-step process involving the blocking of phenolic groups on the lignin molecule with known blocking agents followed by oxidation with chlorine dioxide. The light colored lignin dispersants produced by the invention process exhibit very low staining and low azo dye reduction, good heat stability, dye grinding efficiency, and dispersion stability.
REFERENCES:
patent: 2525433 (1950-10-01), Voet
patent: 2680113 (1954-06-01), Adler et al.
patent: 2690973 (1954-10-01), Voet
patent: 3441528 (1969-04-01), Dede, Jr.
patent: 3503762 (1970-03-01), Remer
patent: 3672817 (1972-06-01), Falkehag et al.
patent: 3763139 (1973-10-01), Falkehag et al.
patent: 3769272 (1973-10-01), Hintz
patent: 3865803 (1975-02-01), Falkehag
K. V. Sarkanen, et al., "Lignins" (1971) p. 457.
Dilling Peter
Sarjeant Peter T.
McDaniel Terry B.
Phillips Delbert R.
Schmalz Richard L.
Westvaco Corporation
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