Method of treating bleached pulp on a washer with calcium ions to remove sodium ions
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United States of America Patent
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Dec 28, 1993
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N/A
app pub date -
Mar 2, 1992
filing date -
Dec 10, 1990
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Expired
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Abstract
Method for treating chemically treated cellulosic pulp that contains sodium ions wherein the pulp is subjected to an ion exchange with a cation (preferably calcium) having a higher valence than the sodium followed by washing of the sodium cations from the pulp and then forming the pulp containing the cations in an amount equivalent to at least 700 ppm of calcium ions into a sheet thereby to facilitate water removal and increase the production rate of the sheet forming machine.
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