Process for purification of quinoline yellow

Details Process for purification of quinoline yellow Process for purification of quinoline yellow

1981-10-28

1983-08-16

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Organic additive for dye composition, dye composition...

Nitrogen-containing, other than nitro or nitroso

8636, 424 14, 546173, C09B 6700

Patent

active

043989160

ABSTRACT:
A multi-step process for the purification of Quinoline Yellow WS involves generating water-insoluble organic amine salts of sulfonated 2-(2-quinolinyl)-1,3-indandione from technical Quinoline Yellow WS followed by treatment of the amine salt with sodium hydroxide to regenerate Quinoline Yellow WS certifiable as a D&C color.

REFERENCES:
patent: 290585 (1883-12-01), Jacobsen
patent: 3470200 (1969-09-01), Anderson
patent: 3807949 (1974-04-01), D'Albignac et al.
patent: 4290812 (1981-09-01), Loock
Kirk-Othmer, "Encyclopedia of Chemical Technology," Third Edition, (1979), vol. 6, p. 577.
Colour Index, (3rd Edition, 1971), The Society of Dyers and Colourists, vol. 4, p. 4435.
K. Venkataraman, "The Chemistry of Synthetic Dyes," vol. VIII, (1978), p. 107.

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