A process for delignifying pulp with organic peroxyacid in the presence of phosphonic acids and their salts
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United States of America Patent
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Sep 3, 1996
Grant Date -
N/A
app pub date -
Jun 29, 1993
filing date -
Jul 6, 1992
priority date (Note) -
Expired
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Abstract
Process for improving the selectivity of the delignification of a chemical paper pulp by employing a peroxyacid, in which the unbleached pulp originating from the cooking operation is treated with an aqueous solution of this organic peroxyacid in the presence of at least one stabilizer selected from phosphonic acids and their salts.
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