Method of preparing reproducibly stable aqueous suspensions of s

Details Method of preparing reproducibly stable aqueous suspensions of s Method of preparing reproducibly stable aqueous suspensions of s

1986-05-20

1988-03-08

Garvin, Sr., Patrick P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

25218822, 25218823, 25218824, 162 83, C01B 1766, D21C 304

Patent

active

047298863

ABSTRACT:
Aqueous sodium dithionite slurries or suspensions, which are nonsettling during shipment thereof and are thereafter pumpable after storage at 32.degree.-40.degree. F. for at least fourteen days, comprise, on a weight basis, about 34% of sodium dithionite, about 0.17% of a xanthan gum, 5.5-6.5% of 50% sodium hydroxide, about 0.26% of a chelate, and about 1.96% of sodium tripolyphosphate which is added after adding the sodium dithionite. Preferably, the sodium tripolyphosphate is added last in making the slurry which is used as a woodpulp bleaching composition.

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