Method of washing of alkaline pulp by adding carbon dioxide to the pulp
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United States of America Patent
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Jul 4, 1995
Issued Date -
N/A
app pub date -
Jul 29, 1993
filing date -
Dec 22, 1986
priority date (Note) -
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Abstract
Method in the washing of alkaline, cellulosic pulp, for example sulphate pulp, CTMP and CMP pulp, the washing being effected in at least one stage. By an addition of carbon dioxide, there will be realized greatly reduced washing losses of, primarily, inorganic ions, as well as improved washing-out of substances which give rise to chemical oxygen demand (COD).
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