Bleaching and dyeing; fluid treatment and chemical modification – Bleaching – Color stripping or subduing
Patent
1998-08-19
2000-09-26
Liott, Caroline D.
Bleaching and dyeing; fluid treatment and chemical modification
Bleaching
Color stripping or subduing
81081, 811551, 549513, 536 45, 536 50, C07D30336
Patent
active
061237388
ABSTRACT:
2,3-Epoxypropyltrimethylammonium chloride having reduced color and method of preparation are disclosed. 2,3-Epoxypropyltrimethylammonium chloride is treated with sodium hypochlorite to reduce its color. 2,3-Epoxypropyltrimethylammonium chloride can be prepared via reaction of trimethylamine and epichlorohydrin. If desired, an aprotic solvent can be used. 2,3-Epoxypropyltrimethylammonium chloride formed in the resultant slurry, must then be isolated via known methods, such as evaporation, extraction, centrifugation, etc, depending upon the other constituents of the slurry and the residual epichlorohydrin removed. The final product is then treated with an effective amount of sodium hypochlorite. The obtained 2,3-epoxypropyltrimethylammonium chloride then is used for, for example, color-sensitive applications such as to produce cationic starch for use in paper manufacture.
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James D. McClure, "Glycidyltrimethylamminium Chloride and Related Compounds", J. Org. Chem., vol. 35, No. 6, pp. 2059-2061 (1970) (no month available).
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Childers Laren P.
Roerden Dorothy L.
Liott Caroline D.
The Dow Chemical Company
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