Method for producing dust-free sodium dithionite

Details Method for producing dust-free sodium dithionite Method for producing dust-free sodium dithionite

1989-06-29

1990-11-27

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423265, 25218822, 25218823, C01B 1766, B01D 1900, C09K 300

Patent

active

049734717

ABSTRACT:
There is disclosed a method for the production of dust-free sodium dithionite from the reaction of a alkaline formate sulfur dioxide and an alkaline metal agent in the presence of a thiosulfate reactive compound by introducing a water-soluble polymer having a molecular weight less than 60,000 and delaying the start of the alkaline metal agent until the sodium formate and the sulfur dioxide have begun to be introduced into the reactor.

REFERENCES:
patent: 3197289 (1965-07-01), Rodgers
patent: 3287276 (1966-11-01), Poschmann et al.
patent: 3677699 (1972-07-01), Fujiwara
patent: 3856696 (1974-12-01), Stanbank et al.
patent: 4622216 (1986-11-01), Winslow et al.

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