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.
More Like This:
JPH07173226 | VINYL SULFONATE POLYMER |
WO/1993/019245 | PROCESS FOR PEROXIDE BLEACHING OF MECHANICAL PULP |
WO/2000/039390 | KRAFT WOOD FIBERS FOR CARBOXYALKYL CELLULOSE |
Inventors:
TAKAYAMA MASAHITO
SUYAMA KENICHIRO
KUROSU KAZUHIRO
SUYAMA KENICHIRO
KUROSU KAZUHIRO
Application Number:
JP2013163673A
Publication Date:
February 16, 2015
Filing Date:
August 06, 2013
Export Citation:
Assignee:
JUJO PAPER CO LTD
International Classes:
D21C9/10; D21C1/02; D21C3/02; D21C9/147
Domestic Patent References:
JP2012519784A | 2012-08-30 | |||
JP2008501074A | 2008-01-17 | |||
JPS50123901A | 1975-09-29 | |||
JP2003342885A | 2003-12-03 | |||
JP2009052187A | 2009-03-12 | |||
JPH09507697A | 1997-08-05 | |||
JP2004256925A | 2004-09-16 | |||
JP2013227705A | 2013-11-07 | |||
JP2012219416A | 2012-11-12 | |||
JP2011157654A | 2011-08-18 | |||
JPH04126885A | 1992-04-27 |
Attorney, Agent or Firm:
Junko Oda
Yamada 淳
Yamada 淳