Title:
METHOD FOR PRODUCING DISSOLVING KRAFT PULP
Document Type and Number:
Japanese Patent JP2014029044
Kind Code:
A
Abstract:
To provide a technique for efficiently producing dissolving kraft pulp having a high α-cellulose content.
A method for producing dissolving kraft pulp comprises the steps of: kraft digesting wood chips which have been treated with pre-hydrolysis; providing the digested pulp with an oxygen delignification treatment; and subjecting the oxygen delignified dissolving kraft pulp to alkali refining. In the alkali refining step, the pulp is treated with an aqueous sodium hydroxide with a concentration of 3 to 25 mass% at 20 to 50°C for 10 to 60 minutes.
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Inventors:
TAKAYAMA MASAHITO
KUROSU KAZUHIRO
KUROSU KAZUHIRO
Application Number:
JP2012170531A
Publication Date:
February 13, 2014
Filing Date:
July 31, 2012
Export Citation:
Assignee:
JUJO PAPER CO LTD
International Classes:
D21C3/02; D01F2/28; D21C3/26
Domestic Patent References:
| JP2008201902A | 2008-09-04 | |||
| JP2001026601A | 2001-01-30 | |||
| JP2002533587A | 2002-10-08 | |||
| JP2009052187A | 2009-03-12 | |||
| JPH09507697A | 1997-08-05 | |||
| JPS4910602B1 | 1974-03-12 | |||
| JP2009213389A | 2009-09-24 |
Foreign References:
| US20120000621A1 | 2012-01-05 | |||
| US4162359A | 1979-07-24 | |||
| CN102493256A | 2012-06-13 |
Other References:
HERBERT SIXTA, HANDBOOK OF PULP, vol. 1, JPN7016000511, 30 January 2008 (2008-01-30), pages 933 - 934, ISSN: 0003271164
GABRIELE SCHILD ET AL.: "MULTIFUNCTIONAL ALKALINE PULPING, DELIGNIFICATION AND HEMICELLULOSE EXTRACTION", CELLULOSE CHEMISTRY AND TECHNOLOGY, vol. 44(1-3), JPN7016000509, 2010, pages 36 - 37, ISSN: 0003271165
紙パルプ技術協会, 亜硫酸パルプ 溶解パルプ, JPN7016000510, 15 November 1966 (1966-11-15), JP, pages 373 - 374, ISSN: 0003271166
大江礼三郎、臼田誠人, 紙およびパルプ 製紙の化学と技術, JPN6016032187, 5 December 1986 (1986-12-05), JP, pages 395 - 433, ISSN: 0003384081
GABRIELE SCHILD ET AL.: "MULTIFUNCTIONAL ALKALINE PULPING, DELIGNIFICATION AND HEMICELLULOSE EXTRACTION", CELLULOSE CHEMISTRY AND TECHNOLOGY, vol. 44(1-3), JPN7016000509, 2010, pages 36 - 37, ISSN: 0003271165
紙パルプ技術協会, 亜硫酸パルプ 溶解パルプ, JPN7016000510, 15 November 1966 (1966-11-15), JP, pages 373 - 374, ISSN: 0003271166
大江礼三郎、臼田誠人, 紙およびパルプ 製紙の化学と技術, JPN6016032187, 5 December 1986 (1986-12-05), JP, pages 395 - 433, ISSN: 0003384081
Attorney, Agent or Firm:
Shinjiro Ono
Yasushi Kobayashi
Hiroyuki Tomita
Mitsutoshi Nakamura
Yasushi Kobayashi
Hiroyuki Tomita
Mitsutoshi Nakamura
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