Production of sodium sulfite utilizing mother liquor from the so

Details Production of sodium sulfite utilizing mother liquor from the so Production of sodium sulfite utilizing mother liquor from the so

1976-08-03

1978-09-05

Cooper, Jack

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423519, C01D 514

Patent

active

041120612

ABSTRACT:
Anhydrous sodium sulfite is made by a process involving introducing substantially anhydrous sodium carbonate concurrently with impurities-containing mother liquor from which sodium metabisulfite crystals have been crystallized and sulfur dioxide-containing gas into a saturated solution of sodium sulfite maintained at pH of between about 6.5 and about 7.6 at temperature above about 35.degree. C. to form a slurry of anhydrous sodium sulfite crystals, and withdrawing the crystals from the slurry. The process is initiated using a concentrated sodium sulfite solution containing less than about 3 ppm of dissolved iron.

REFERENCES:
patent: 1865754 (1932-07-01), Hand
patent: 1937944 (1933-12-01), Butler
patent: 2719075 (1955-09-01), Allen
patent: 2899273 (1959-08-01), Murphy
patent: 3216793 (1965-11-01), Spormann et al.
patent: 3305307 (1967-02-01), Spormann et al.
patent: 3361524 (1968-01-01), Spormann et al.
patent: 3622443 (1971-11-01), Galeano
patent: 4003985 (1977-01-01), Hoffman et al.

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