Stabilized water-containing sodium dithionite formulations...

C - Chemistry – Metallurgy – 01 – B

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C01B 17/66 (2006.01) C01F 5/14 (2006.01)

Patent

CA 1263218

ABSTRACT OF THE DISCLOSURE: The invention relates to a stabilized water- containing sodium dithionite formulation having the consistency of a pumpable paste with a viscosity of 0.1 to 1,500 Pa.s, a pH > 10 and containing 60 to 70% by weight of sodium dithionite and 15 to 30% by weight of water, the total content of these two components in the formulation not exceeding 90% by weight, and furthermore containing a sodium and/or potassium salt which is dissolved in the water, is inert to sodium dithionite and has a water solubility greater than 500 g/l at 20°C, the salt being a member selected from the group consisting of sodium formate, sodium acetate, sodium hydroxymethanesulfinate, potassium carbonate and potassium sulfite and mixtures thereof, with the proviso that the concentration of the sodium and/or potassium salt dissolved in the water is not less than 200 g/l. The paste is useful as reducing agent.

474817

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