Method of selecting wood for chemical pulping
US6822183B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 12, 2002 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Jun 6, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/2634
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.