Sodium hydrosulfite slurries

Details Sodium hydrosulfite slurries Sodium hydrosulfite slurries

C - Chemistry, Metallurgy

01

B

8/81

C01B 17/66 (2006.01) D06L 3/10 (2006.01)

Patent

CA 1247808

ABSTRACT . Aqueous sodium dithionite slurries, which are non-settling during shipment thereof and are thereafter pumpable, and a method for their manufacture are provided. The slurries contain at least 20% by weight of crystalline pure sodium dithionite and at least about 0.13% by weight of a xanthan gum. As textile bleaching compositions, the slurries preferably comprise, on a weight basis, at least about 36% of commercial tripolyphosphate-free sodium dithionite, at least about 3% of sodium hydroxide, at least about 0.25% of a chelate, and at least about 0.25% of a xanthan gum. As woodpulp bleaching compositions, the slurries preferably comprise, on a weight basis, about 28% of commercial sodium dithionite, at least about 2% of sodium carbonate, at least 2% of sodium tripolyphosphate, and at least about 0.13% of particular xanthan gums.

469238

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