FR2177877A1 - Bleaching cellulose pulp - with impregnation of pulp prior to bleaching to improve props - Google Patents

Bleaching cellulose pulp - with impregnation of pulp prior to bleaching to improve props

Info

Publication number
FR2177877A1
FR2177877A1 FR7310381A FR7310381A FR2177877A1 FR 2177877 A1 FR2177877 A1 FR 2177877A1 FR 7310381 A FR7310381 A FR 7310381A FR 7310381 A FR7310381 A FR 7310381A FR 2177877 A1 FR2177877 A1 FR 2177877A1
Authority
FR
France
Prior art keywords
pulp
bleaching
impregnation
props
improve
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
FR7310381A
Other languages
French (fr)
Other versions
FR2177877B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mo och Domsjo AB
Original Assignee
Mo och Domsjo 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 Mo och Domsjo AB filed Critical Mo och Domsjo AB
Publication of FR2177877A1 publication Critical patent/FR2177877A1/en
Application granted granted Critical
Publication of FR2177877B1 publication Critical patent/FR2177877B1/fr
Granted legal-status Critical Current

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
    • 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
    • D21C9/1026—Other features in bleaching processes

Landscapes

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

Abstract

Cellulosic pulp, destined for bleaching with O2 contg. gas, is produced under press. by any conventional digestion process. Most of the digestion liquor is removed in a washing stage by displacement with a countercurrent of liquor used in the bleaching process. The washed pulp passes to an impregnation zone where it is contacted with sufficient alkali for the bleaching process and impregnated with cellulose decompsn inhibitors. Each stage is effected under pressure. The pulp is then bleached. Pulp of improved mechanical properties is obtd, with more efficient use of materials and heat.
FR7310381A 1972-03-30 1973-03-22 Bleaching cellulose pulp - with impregnation of pulp prior to bleaching to improve props Granted FR2177877A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7204251A SE373397C (en) 1972-03-30 1972-03-30 WAY TO IMPROVE THE WHEATING WHITING WHEN BLINDING CELLULOSAMASSA WITH AN ACID CONTAINING GAS

Publications (2)

Publication Number Publication Date
FR2177877A1 true FR2177877A1 (en) 1973-11-09
FR2177877B1 FR2177877B1 (en) 1975-08-22

Family

ID=20263802

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7310381A Granted FR2177877A1 (en) 1972-03-30 1973-03-22 Bleaching cellulose pulp - with impregnation of pulp prior to bleaching to improve props

Country Status (6)

Country Link
JP (1) JPS5116524B2 (en)
CA (1) CA1001360A (en)
FI (1) FI60733C (en)
FR (1) FR2177877A1 (en)
SE (1) SE373397C (en)
SU (1) SU847932A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992007994A1 (en) * 1990-10-24 1992-05-14 Beloit Corporation Pulping process

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE394466C (en) * 1974-05-16 1986-06-23 Mannbro Systems Handelsbolag SEE CONTINUOUS ALKALIC DELIGNIFICATION OF LIGNOCELLULOSAMENTAL MATERIAL IN TWO OR MULTIPLE STEPS, WHICH ARE LAST WITH Oxygen
JPS583074B2 (en) * 1975-11-17 1983-01-19 三菱瓦斯化学株式会社 Palpuno Kasan Kabutsu Hiyou Hakuhou

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992007994A1 (en) * 1990-10-24 1992-05-14 Beloit Corporation Pulping process

Also Published As

Publication number Publication date
FR2177877B1 (en) 1975-08-22
SU847932A3 (en) 1981-07-15
SE373397C (en) 1984-02-06
JPS5116524B2 (en) 1976-05-25
CA1001360A (en) 1976-12-14
FI60733B (en) 1981-11-30
SE373397B (en) 1975-02-03
FI60733C (en) 1982-03-10
JPS497503A (en) 1974-01-23

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Legal Events

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