Removal of manganese from pulp using a chelating agent and magnesium sulphate
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United States of America Patent
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Apr 27, 1993
Grant Date -
N/A
app pub date -
Nov 25, 1991
filing date -
Nov 25, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The removal of manganese from pulp is enhanced by supplementing the treatment with a chelating agent by the addition of at least 500 ppm of magnesium ions prior to thickening of the pulp thereby to reduce the manganese content of the thickened pulp significantly more than the content would be reduced by the treatment with the chelating agent without the magnesium ions.
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