FR2390541A1 - Procede de blanchiment de cellulose - Google Patents

Procede de blanchiment de cellulose

Info

Publication number
FR2390541A1
FR2390541A1 FR7807150A FR7807150A FR2390541A1 FR 2390541 A1 FR2390541 A1 FR 2390541A1 FR 7807150 A FR7807150 A FR 7807150A FR 7807150 A FR7807150 A FR 7807150A FR 2390541 A1 FR2390541 A1 FR 2390541A1
Authority
FR
France
Prior art keywords
bleaching
stage
peroxide
whitenesses
carried out
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
FR7807150A
Other languages
English (en)
Other versions
FR2390541B1 (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.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
Deutsche Gold und Silber Scheideanstalt
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 Degussa GmbH, Deutsche Gold und Silber Scheideanstalt filed Critical Degussa GmbH
Publication of FR2390541A1 publication Critical patent/FR2390541A1/fr
Application granted granted Critical
Publication of FR2390541B1 publication Critical patent/FR2390541B1/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
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp

Landscapes

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

Abstract

a. Procédé de blanchiment de cellulose en bain aqueux comprenant une étape de chloration acide et une étape alcaline au peroxyde. b. Procédé caractérisé en ce qu'avant d'effectuer la chloration acide, on ajoute au bain de blanchiment un sel de magnésium resp. un composé de magnésium. c. L'invention concerne le blanchiment de cellulose.
FR7807150A 1977-05-12 1978-03-13 Procede de blanchiment de cellulose Granted FR2390541A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772721402 DE2721402C2 (de) 1977-05-12 1977-05-12 Verfahren zum Bleichen von Zellstoff

Publications (2)

Publication Number Publication Date
FR2390541A1 true FR2390541A1 (fr) 1978-12-08
FR2390541B1 FR2390541B1 (fr) 1981-04-30

Family

ID=6008737

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7807150A Granted FR2390541A1 (fr) 1977-05-12 1978-03-13 Procede de blanchiment de cellulose

Country Status (4)

Country Link
AT (1) AT364243B (fr)
CH (1) CH633844A5 (fr)
DE (1) DE2721402C2 (fr)
FR (1) FR2390541A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2841013C2 (de) * 1978-09-21 1984-06-07 Degussa Ag, 6000 Frankfurt Verfahren zur Vollbleiche von Zellstoff

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1801876A (en) * 1924-05-22 1931-04-21 Ig Farbenindustrie Ag Process for bleaching cellulose fiber
US1998389A (en) * 1929-11-23 1935-04-16 Scheller Emil Process for improving cellulose
US2026068A (en) * 1929-09-11 1935-12-31 Du Pont Process for the improvement of cellulose
US2083294A (en) * 1932-05-16 1937-06-08 Francis J Cirves Process for bleaching pulp
DE736070C (de) * 1938-07-01 1943-06-07 Degussa Verfahren zum Behandeln von Zellstoff
US2527563A (en) * 1947-08-13 1950-10-31 Buffalo Electro Chem Co Method of bleaching semichemical pulps

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO138491B (no) * 1974-04-17 1978-06-05 Per Kock Christensen Fremgangsmaate ved delignifisering og bleking av cellulosemasse

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1801876A (en) * 1924-05-22 1931-04-21 Ig Farbenindustrie Ag Process for bleaching cellulose fiber
US2026068A (en) * 1929-09-11 1935-12-31 Du Pont Process for the improvement of cellulose
US1998389A (en) * 1929-11-23 1935-04-16 Scheller Emil Process for improving cellulose
US2083294A (en) * 1932-05-16 1937-06-08 Francis J Cirves Process for bleaching pulp
DE736070C (de) * 1938-07-01 1943-06-07 Degussa Verfahren zum Behandeln von Zellstoff
US2527563A (en) * 1947-08-13 1950-10-31 Buffalo Electro Chem Co Method of bleaching semichemical pulps

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NV2068/77 *

Also Published As

Publication number Publication date
FR2390541B1 (fr) 1981-04-30
DE2721402A1 (de) 1978-11-16
AT364243B (de) 1981-10-12
CH633844A5 (en) 1982-12-31
DE2721402C2 (de) 1984-04-12
ATA339178A (de) 1981-02-15

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Legal Events

Date Code Title Description
ST Notification of lapse