Stabilized dithionite solutions

Details Stabilized dithionite solutions Stabilized dithionite solutions

1984-10-25

1986-04-15

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Organic additive for dye composition, dye composition...

Polymeric additive

8592, 8650, 8110, 811568, 8918, 252 86, 25218823, 423265, 423515, C09B 6700, A62D 300, C01B 1500

Patent

active

045825106

ABSTRACT:
Guar and xanthan gums are used as additives to sodium dithionite aqueous solutions for enhancing the stability of such solutions when in contact with air and used for vat dyeing of textiles and bleaching. The gums are added at levels of 0.1-0.2% by wt. and preferably at 0.15% by wt. of the solution. The stability of these polymeric-containing bleaching solutions is enhanced by more than 100-200%.

REFERENCES:
patent: 3804944 (1974-04-01), Kise et al.
patent: 3985674 (1976-10-01), Ellis et al.
patent: 4100098 (1978-07-01), Magan
patent: 4534954 (1985-08-01), Little et al.
R. C. Shah, Textile Chemist and Colorist, 1972, vol. 4, No. 11, pp. 59-61.
G. P. Nair and R. C. Shah, Textile Chemist and Colorist, 1970, vol. 2, No. 13, pp. 239-244.

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