METHOD FOR RECOVERY OF COMPRESSION WOOD AND/OR NORMAL WOOD FROM OVERSIZE CHIPS

The invention relates to a method for recovery of branch knot wood and/or normal wood from oversize chips, and according to the invention the oversize chips are ground to splinter, which then is dried and mixed with water, and then the sedimented splinter containing high concentrations of extractive...

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Bibliographische Detailangaben
Hauptverfasser:	ECKERMAN, CHRISTER, HOLMBOM, BJARNE
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT PAPER-MAKING PERFORMING OPERATIONS POSTAL SORTING PRODUCTION OF CELLULOSE SEPARATING SOLIDS FROM SOLIDS SORTING SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTEDPIECE-MEAL, e.g. BY PICKING TEXTILES TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention relates to a method for recovery of branch knot wood and/or normal wood from oversize chips, and according to the invention the oversize chips are ground to splinter, which then is dried and mixed with water, and then the sedimented splinter containing high concentrations of extractive substances and having a high specific weight is recovered and extracted in order to recover valuable extractive substances, particularly lignans. The lighter splinter floating up to the water surface is recovered in order to recover normal wood material for the pulp production.