Low toxicity, biodegradable salt substitute for dyeing textiles:

Details Low toxicity, biodegradable salt substitute for dyeing textiles: Low toxicity, biodegradable salt substitute for dyeing textiles:

1991-10-07

1993-05-04

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Reactive dye composition, process, or product

8532, 8558, 8594, 8598, 8599, 8618, 8680, 8918, C09B 6280, C09B 6780

Patent

active

052078000

ABSTRACT:
Low toxicity, biodegradable salt substitutes for use in dyeing of cotton and cotton blended fabrics. The salt substitutes are solubilized alkaline earth metal-organic complex compositions suitable to promote satisfactory dyeing. Preferably the composition is a mixture of magnesium acetate, magnesium citrate, and magnesium polyacrylate. After dyeing, a shift to alkaline pH in the wastewater treatment process allows for precipitation of the metal and the production of a biodegradable organic anion. The use of the salt compounds of the present invention in place of conventional sodium chloride or sulfate salts prevents the discharge of untreatable toxic wastewater into natural waterways.

REFERENCES:
patent: 4391607 (1983-07-01), Hildebrand
patent: 4547196 (1985-10-01), Balland
patent: 4826503 (1989-05-01), Lande

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