Kraft pulp yield by heat treatment of polysulphide liquors generated by oxidation
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United States of America Patent
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N/A
Issued Date -
Oct 10, 2002
app pub date -
Jan 23, 2002
filing date -
Jan 24, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Oxidized white liquor is heat treated to increase the concentration of PS.sub.UV measured at 285 or 286 nm or PS.sub.VIS measured at 416 nm and the PS.sub.UV/PS.sub.GR or PS.sub.VIS/PS.sub.GR ratio, whereby the content of active polysulphide in the total polysulphide is increased which active polysulphide can be exploited to increase pulp yield in Kraft pulping.
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