SE9503694L - Oxygen delignification of pulp in a first HC stage and a second MC stage - Google Patents

Oxygen delignification of pulp in a first HC stage and a second MC stage

Info

Publication number
SE9503694L
SE9503694L SE9503694A SE9503694A SE9503694L SE 9503694 L SE9503694 L SE 9503694L SE 9503694 A SE9503694 A SE 9503694A SE 9503694 A SE9503694 A SE 9503694A SE 9503694 L SE9503694 L SE 9503694L
Authority
SE
Sweden
Prior art keywords
stage
pulp
oxygen delignification
shall
delignification
Prior art date
Application number
SE9503694A
Other languages
Swedish (sv)
Other versions
SE505147C2 (en
SE9503694D0 (en
Inventor
Ulf Germgaard
Jonas Lindquist
Monica Bokstroem
Original Assignee
Sunds Defibrator Ind Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sunds Defibrator Ind Ab filed Critical Sunds Defibrator Ind Ab
Priority to SE9503694A priority Critical patent/SE505147C2/en
Publication of SE9503694D0 publication Critical patent/SE9503694D0/en
Priority to ZA967931A priority patent/ZA967931B/en
Priority to CA002186204A priority patent/CA2186204A1/en
Publication of SE9503694L publication Critical patent/SE9503694L/en
Publication of SE505147C2 publication Critical patent/SE505147C2/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

A method of oxygen delignification of pulp from lignocellulosic material. The oxygen delignification is carried out in two steps where the pulp concentration in the first step is 25-40% and in the second step 8-16%. The temperature in the second step shall be at least as high as in the first step, and the staytime in the first step shall be shorter than in the second step.
SE9503694A 1995-10-19 1995-10-19 Oxygen delignification of pulp in a first HC stage and a second MC stage SE505147C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9503694A SE505147C2 (en) 1995-10-19 1995-10-19 Oxygen delignification of pulp in a first HC stage and a second MC stage
ZA967931A ZA967931B (en) 1995-10-19 1996-09-19 Bleaching of pulp
CA002186204A CA2186204A1 (en) 1995-10-19 1996-09-23 Bleaching of pulp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9503694A SE505147C2 (en) 1995-10-19 1995-10-19 Oxygen delignification of pulp in a first HC stage and a second MC stage

Publications (3)

Publication Number Publication Date
SE9503694D0 SE9503694D0 (en) 1995-10-19
SE9503694L true SE9503694L (en) 1997-04-20
SE505147C2 SE505147C2 (en) 1997-06-30

Family

ID=20399904

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9503694A SE505147C2 (en) 1995-10-19 1995-10-19 Oxygen delignification of pulp in a first HC stage and a second MC stage

Country Status (3)

Country Link
CA (1) CA2186204A1 (en)
SE (1) SE505147C2 (en)
ZA (1) ZA967931B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE540043C2 (en) * 2015-11-27 2018-03-06 Valmet Oy Method and system for oxygen delignification of cellulose pulp

Also Published As

Publication number Publication date
SE505147C2 (en) 1997-06-30
ZA967931B (en) 1997-04-07
CA2186204A1 (en) 1997-04-20
SE9503694D0 (en) 1995-10-19

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