Compositions – Reductive bleachant – deoxidant – reductant – or generative – Sulfur containing reductant – bleachant – deoxidant – or...
Patent
1980-03-07
1982-11-02
Schofer, Joseph L.
Compositions
Reductive bleachant, deoxidant, reductant, or generative
Sulfur containing reductant, bleachant, deoxidant, or...
162 80, 162 83, 8107, 8110, 423512R, 423515, C09K 300
Patent
active
043572561
ABSTRACT:
A bleaching composition comprises sodium hydrosulfite, hexamethylenetetramine and a water soluble sulfite such as sodium sulfite or ammonium sulfite, or further a polyphosphate such as a pyrophosphate or a tripolyphosphate and is used in bleaching pulp with a good bleaching effect with no substantial hydrogen sulfide generation.
REFERENCES:
patent: 3653804 (1972-04-01), Janson et al.
patent: 3666409 (1972-05-01), Yoshikawa et al.
patent: 3669895 (1972-06-01), Shasti
Barr J. L.
Mitsubishi Gas Chemical Company Inc.
Schofer Joseph L.
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