Method of selecting wood for chemical pulping
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United States of America Patent
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Nov 23, 2004
Grant Date -
Aug 22, 2002
app pub date -
Feb 12, 2002
filing date -
Feb 13, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of selecting bulk wood units for chemical pulping in alkaline conditions which consists of establishing a reference scale by selecting a test sample, measuring the acoustic velocity through each sample units, selecting acoustic velocity bands from the sample results, processing the sample units using known chemical pulping processes, measuring the percentage pulp yield, and then using the measured pulp yields and acoustic velocities to produce a reference scale; measuring the acoustic velocity through each of the units, comparing the velocity measurement for each unit against the reference scale, and then dividing the tested units into subgroups according to the predicted yield in chemical pulping.
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