Process for production of sodium bisulfite

Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing

Reexamination Certificate

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C423S519200

Reexamination Certificate

active

07985396

ABSTRACT:
Processes for producing sodium bisulfite from sodium sulfite purge streams are disclosed which enable recovery of additional resource material including sodium bisulfite.

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“13. Sulfur Oxygen Acids and Their Salts,” retrieved Feb. 12, 2007, from http://www.mrw.interscience.wiley.com/emrw/9780471238966/kirk/article/sulfweil.a01/current/html?hd=All,sodium&hd=All,metabisulfite#sulfweil.a01-sec1-0013 (5 pages).
Weil, E. D., et al., Kirk-Othmer Encyclopedia of Chemical Technology vol. 23 p. 47 (5th ed. 2004).

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