Process for preparing a super saturated liquid alkali compositio

Details Process for preparing a super saturated liquid alkali compositio Process for preparing a super saturated liquid alkali compositio

1992-04-27

1995-01-17

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

Reactive dye composition, process, or product

8618, 423421, 423641, C09B 6700

Patent

active

053822625

ABSTRACT:
A liquid alkali composition fiber reactive dyeing of cotton and cotton blended fabrics. The liquid alkali is a solution of an alkali metal hydroxide and its carbonate formed by reaction of liquid CO.sub.2 with the alkali metal hydroxide solution. The resulting supersaturated solution has a high enough Total Alkalinity to achieve reaction between the dye and fiber but is sufficiently buffered to achieve this reaction slowly so that the fiber reactive dyes fix in a level, uniform fashion, Preferably the composition is a mixture of potassium hydroxide, potassium carbonate, potassium citrate, and potassium polyacrylate. The citrate and polyacrylate act as dispersants in the dyeing process and also act as crystallization inhibitors in solution. The use of the carbonate compounds of the present invention in place of conventional silicates or phosphorus prevents the discharge of untreatable toxic wastewater into natural waterways.

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R. E. Davis et al., "Principles of Chemistry" (CBS College Publishing), 1984, pp. 591-599, 745-746.
M. J. Sienko, "Chemistry"0 (McGraw-Hill), Second Edition, 1961, pp. 471-472.

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