Methods for producing high-freeness pulp

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United States of America Patent

PATENT NO 8753476
APP PUB NO 20120085505A1
SERIAL NO

13239756

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
ANDRITZ TECHNOLOGY AND ASSET MANAGEMENT GMBH8045 GRAZ

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sabourin, Marc Beavercreek, US 7 81

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