METHODS FOR PRODUCING HIGH-FREENESS PULP

METHODS FOR PRODUCING HIGH-FREENESS PULP

Methods of producing mechanical pulps from lignocellulosic material including partial defibration of lignocellulosic material in a chip press followed by liquid impregnation, preheating the lignocellulosic material for 20 seconds or less at a pressure between 7.5 and 12 bar (gauge) prior to mechanic...

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Bibliographische Detailangaben
1. Verfasser: SABOURIN MARC
Format: Patent
Sprache:eng
Schlagworte:
APPARATUS THEREFOR
FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
PAPER-MAKING
PRODUCTION OF CELLULOSE
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS
REGENERATION OF PULPING LIQUORS
TEXTILES
TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKINGMACHINE
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Beschreibung
Zusammenfassung:Methods of producing mechanical pulps from lignocellulosic material including partial defibration of lignocellulosic material in a chip press followed by liquid impregnation, preheating the lignocellulosic material for 20 seconds or less at a pressure between 7.5 and 12 bar (gauge) prior to mechanically refining the lignocellulosic material in a primary mechanical refiner at a pressure between 7.5 and 12 bar (gauge), thus obtaining a high freeness pulp.