Title:
METHOD FOR PRODUCING DISSOLVED PULP
Document Type and Number:
Japanese Patent JP2015206139
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing dissolved pulp satisfying an ultrahigh purity (α cellulose content>97%), a high polymerization degree (η>700) and a high whiteness (ISO brightness>90).SOLUTION: Provided is a method for producing dissolved pulp immersing a bleach pulp into cold concentrated alkali, thus hemicellulose is removed to increase the purity of α cellulose, in which the step of immersing the bleach pulp into cold concentrated alkali is a treatment where the bleach pulp is immersed into a sodium hydroxide aqueous solution of 7.0 to 7.5 wt.% in the range of 15 to 100°C for 30 to 90 min.
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Inventors:
MORI TOMOO
Application Number:
JP2014087959A
Publication Date:
November 19, 2015
Filing Date:
April 22, 2014
Export Citation:
Assignee:
CHUETSU PULP IND
International Classes:
D21C9/00; C08B15/08; D21C3/02; D21C9/10
Domestic Patent References:
| JP2014029044A | 2014-02-13 | |||
| JPS5277202A | 1977-06-29 | |||
| JP2005126871A | 2005-05-19 | |||
| JP2010528191A | 2010-08-19 |
Attorney, Agent or Firm:
Aperture Muneaki