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Title:
METHOD OF PRODUCING DISSOLVING KRAFT PULP
Document Type and Number:
Japanese Patent JP2015030954
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a technique of producing high-quality dissolving kraft pulp efficiently.SOLUTION: A method of producing dissolving kraft pulp includes (a) a step of subjecting wood chips to hydrothermal treatment to hydrolyze hemicellulose contained in the wood chips, (b) a step of washing the wood chips after the hydrolysis to recover wood chips, (c) a step of subjecting the recovered wood chips to craft digestion to produce pulp, (d) a step of subjecting the pulp after craft digestion to an oxygen delignification treatment and (e) a step of bleaching the pulp after the oxygen delignification treatment. The step of bleaching the pulp after the oxygen delignification treatment includes an acid treatment stage.

Inventors:
TAKAYAMA MASAHITO
SUYAMA KENICHIRO
KUROSU KAZUHIRO
Application Number:
JP2013163673A
Publication Date:
February 16, 2015
Filing Date:
August 06, 2013
Export Citation:
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Assignee:
JUJO PAPER CO LTD
International Classes:
D21C9/10; D21C1/02; D21C3/02; D21C9/147
Domestic Patent References:
JP2012519784A2012-08-30
JP2008501074A2008-01-17
JPS50123901A1975-09-29
JP2003342885A2003-12-03
JP2009052187A2009-03-12
JPH09507697A1997-08-05
JP2004256925A2004-09-16
JP2013227705A2013-11-07
JP2012219416A2012-11-12
JP2011157654A2011-08-18
JPH04126885A1992-04-27
Attorney, Agent or Firm:
Junko Oda
Yamada 淳