FR2426767A1 - Blanchiment de pate a papier - Google Patents

Blanchiment de pate a papier

Info

Publication number
FR2426767A1
FR2426767A1 FR7912874A FR7912874A FR2426767A1 FR 2426767 A1 FR2426767 A1 FR 2426767A1 FR 7912874 A FR7912874 A FR 7912874A FR 7912874 A FR7912874 A FR 7912874A FR 2426767 A1 FR2426767 A1 FR 2426767A1
Authority
FR
France
Prior art keywords
salt
paper pulp
pulp
cellulose
methylene
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
FR7912874A
Other languages
English (en)
Other versions
FR2426767B1 (fr
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.)
Bayer Agriculture BVBA
Original Assignee
Monsanto Europe NV SA
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 Monsanto Europe NV SA filed Critical Monsanto Europe NV SA
Publication of FR2426767A1 publication Critical patent/FR2426767A1/fr
Application granted granted Critical
Publication of FR2426767B1 publication Critical patent/FR2426767B1/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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1042—Use of chelating agents

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Cereal-Derived Products (AREA)

Abstract

L'invention a pour objet un perfectionnement apporté au blanchiment de pâte de cellulose kraft. Pour empêcher la dégradation de la cellulose qui se produit au cours du blanchiment de la pâte par l'oxygène, celui-ci est effectué en présence de sels de métaux alcalins de certains acides aminométhylène-phosphoniques. Lorsqu'ils sont ajoutés en quantités suffisantes, ces sels peuvent être les sels inhibiteurs, et dans des proportions plus faibles ils améliorent l'action connue des sels de magnésium.
FR7912874A 1978-05-26 1979-05-21 Blanchiment de pate a papier Granted FR2426767A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2290178 1978-05-26

Publications (2)

Publication Number Publication Date
FR2426767A1 true FR2426767A1 (fr) 1979-12-21
FR2426767B1 FR2426767B1 (fr) 1985-03-22

Family

ID=10186899

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7912874A Granted FR2426767A1 (fr) 1978-05-26 1979-05-21 Blanchiment de pate a papier

Country Status (7)

Country Link
AU (1) AU528265B2 (fr)
CA (1) CA1120210A (fr)
FI (1) FI71177C (fr)
FR (1) FR2426767A1 (fr)
NO (1) NO153309C (fr)
SE (1) SE7904430L (fr)
ZA (1) ZA792563B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482146A1 (fr) * 1980-05-07 1981-11-13 Mo Och Domsjoe Ab Procede de blanchiment a l'oxygene de la pate cellulosique preparee par voie chimique
FR2483479A1 (fr) * 1980-05-27 1981-12-04 Mo Och Domsjoe Ab Procede de delignification et/ou de blanchiment de pate de cellulose au gaz oxygene

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102229619A (zh) * 2011-04-26 2011-11-02 河南清水源科技股份有限公司 四乙烯五胺七亚甲基膦酸及其生产工艺
CA3075029A1 (fr) 2017-09-11 2019-03-14 Solenis Technologies, L.P. Procede d'amelioration de la delignification a l'oxygene de pates chimiques de bois

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2144853A1 (fr) * 1971-07-07 1973-02-16 Monsanto Co

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2144853A1 (fr) * 1971-07-07 1973-02-16 Monsanto Co

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/72 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482146A1 (fr) * 1980-05-07 1981-11-13 Mo Och Domsjoe Ab Procede de blanchiment a l'oxygene de la pate cellulosique preparee par voie chimique
FR2483479A1 (fr) * 1980-05-27 1981-12-04 Mo Och Domsjoe Ab Procede de delignification et/ou de blanchiment de pate de cellulose au gaz oxygene

Also Published As

Publication number Publication date
SE7904430L (sv) 1979-11-27
NO153309B (no) 1985-11-11
CA1120210A (fr) 1982-03-23
AU528265B2 (en) 1983-04-21
FR2426767B1 (fr) 1985-03-22
NO153309C (no) 1986-02-19
ZA792563B (en) 1980-10-29
FI71177C (fi) 1986-11-24
NO791728L (no) 1979-11-27
AU4723379A (en) 1979-11-29
FI71177B (fi) 1986-08-14
FI791681A7 (fi) 1979-11-27

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Legal Events

Date Code Title Description
ST Notification of lapse