DE180529T1 - METHOD FOR PROVIDING CHEMICAL WOOD PULPS WITH REGARD TO THE BLEACHES. - Google Patents

METHOD FOR PROVIDING CHEMICAL WOOD PULPS WITH REGARD TO THE BLEACHES.

Info

Publication number
DE180529T1
DE180529T1 DE198585420187T DE85420187T DE180529T1 DE 180529 T1 DE180529 T1 DE 180529T1 DE 198585420187 T DE198585420187 T DE 198585420187T DE 85420187 T DE85420187 T DE 85420187T DE 180529 T1 DE180529 T1 DE 180529T1
Authority
DE
Germany
Prior art keywords
chlorine
pretreatment
pulp
bleaches
regard
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.)
Pending
Application number
DE198585420187T
Other languages
German (de)
Inventor
Christian F-38610 Gieres De Choudens
Dominique F-38130 Echirolles Lachenal
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.)
Arkema France SA
Original Assignee
Atochem 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9309092&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE180529(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Atochem SA filed Critical Atochem SA
Publication of DE180529T1 publication Critical patent/DE180529T1/en
Pending 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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
    • D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

1. Process for preparing chemical paper pulps in order to bleach them, of the type in which the said pulp is treated with chlorine, then with at least one oxygen compound, characterized in that the pretreatment with chlorine is performed with a pulp having a consistency between 5 % and 15 %, at a temperature between 70 degrees C and 90 degrees C, with a chlorine concentration between 0.8 % and 1.5 % by weight with respect to the weight of the pulp.

Claims (7)

85 420 187.8 Ansprüche85 420 187.8 Claims 1. Verfahren zur Herstellung von chemischen Papiermassen im Hinblick auf ihre Bleichung des Typs, bei dem die Masse mit Chlor und danach mit einer sauerstoffhaltigen Verbindung behandelt wird, dadurch gekennzeichnet, daß man die Vorbehandlung mit Chlor auf eine Masse mit einer Konsistenz zwischen 5 und 15 % bei einer Temperatur zwischen 50° und 1000C mit einer Chlorkonzentra- : tion zwischen 0,5 und 2 % einwirken läßt.1. Process for the production of chemical paper pulps with a view to their bleaching of the type in which the pulp is treated with chlorine and then with an oxygen-containing compound, characterized in that the pretreatment with chlorine to a pulp with a consistency between 5 and 15 % at a temperature between 50 ° and 100 0 C at a Chlorkonzentra-: tion is allowed to act between 0.5 and 2%. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet,2. The method according to claim 1, characterized in that daß die Vorbehandlung mit Chlor bei einer Temperatur zwischen 70 und 900C durchgeführt wird.that the pretreatment with chlorine at a temperature between 70 and 90 0 C is carried out. ,t , t 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Dauer der Vorbehandlung mit Chlor zwischen 5 und 30 Minuten, vorzugsweise zwischen 10 und 20 Minuten beträgt.3. The method according to claim 1, characterized in that that the duration of the pretreatment with chlorine between 5 and 30 minutes, preferably between 10 and 20 minutes. _ _ 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Konzentration an Chlor während der Vorbehandlung zwischen 0,8 und 1,5 Gewichtsprozent, bezogen auf das Gewicht der Masse, beträgt.4. The method according to claim 1, characterized in that that the concentration of chlorine during the pretreatment is between 0.8 and 1.5 percent by weight, based on the weight of the mass. 5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß während der Vorbehandlung mit Chlor die Konsistenz der Masse zwischen 8 und 12 % liegt.5. The method according to claim 1, characterized in that the consistency during the pretreatment with chlorine the mass is between 8 and 12%. 6. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die sauerstoffhaltige Verbindung Sauerstoff selbst ist.6. The method according to claim 1, characterized in that the oxygen-containing compound is oxygen itself is. - 2 - 85 420 187.8- 2 - 85 420 187.8 7. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die sauerstoffhaltige Verbindung Wasserstoffperoxid ist, welches man bei einer Temperatur um 12O0C umsetzt.7. The method according to claim 1, characterized in that the oxygen-containing compound is hydrogen peroxide, which is reacted at a temperature around 12O 0 C.
DE198585420187T 1984-10-25 1985-10-22 METHOD FOR PROVIDING CHEMICAL WOOD PULPS WITH REGARD TO THE BLEACHES. Pending DE180529T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8416518A FR2572431B1 (en) 1984-10-25 1984-10-25 PROCESS FOR THE PREPARATION OF CHEMICAL PAPER PULP FOR BLEACHING.

Publications (1)

Publication Number Publication Date
DE180529T1 true DE180529T1 (en) 1986-12-18

Family

ID=9309092

Family Applications (2)

Application Number Title Priority Date Filing Date
DE8585420187T Expired DE3563548D1 (en) 1984-10-25 1985-10-22 Process for preparing chemical wood pulps with a view to bleaching
DE198585420187T Pending DE180529T1 (en) 1984-10-25 1985-10-22 METHOD FOR PROVIDING CHEMICAL WOOD PULPS WITH REGARD TO THE BLEACHES.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE8585420187T Expired DE3563548D1 (en) 1984-10-25 1985-10-22 Process for preparing chemical wood pulps with a view to bleaching

Country Status (9)

Country Link
EP (1) EP0180529B2 (en)
JP (1) JPS61102495A (en)
AT (1) ATE35433T1 (en)
AU (1) AU576394B2 (en)
CA (1) CA1273755A (en)
DE (2) DE3563548D1 (en)
ES (1) ES8606557A1 (en)
FI (1) FI82726C (en)
FR (1) FR2572431B1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1544216A (en) * 1921-08-11 1925-06-30 Donald J Campbell Molding apparatus
GB1262655A (en) * 1968-09-20 1972-02-02 Canadian Ind Bleaching of wood pulp
JPS51102103A (en) * 1975-03-05 1976-09-09 Nippon Parupu Kogyo Kk Ryusanenhoparupuno hyohakuhoho
DE2538673C2 (en) * 1975-08-30 1986-01-16 Degussa Ag, 6000 Frankfurt Bleaching of cellulose with considerably reduced use of chlorine
US4402788A (en) * 1982-04-26 1983-09-06 Champion International Corporation Process for bleaching wood pulp with hydrogen peroxide

Also Published As

Publication number Publication date
JPS61102495A (en) 1986-05-21
FI82726C (en) 1991-04-10
FI854148L (en) 1986-04-26
AU576394B2 (en) 1988-08-25
ATE35433T1 (en) 1988-07-15
EP0180529B2 (en) 1992-04-08
DE3563548D1 (en) 1988-08-04
CA1273755A (en) 1990-09-11
FR2572431B1 (en) 1987-12-04
EP0180529A1 (en) 1986-05-07
FI854148A0 (en) 1985-10-23
EP0180529B1 (en) 1988-06-29
ES8606557A1 (en) 1986-04-01
ES548166A0 (en) 1986-04-01
FI82726B (en) 1990-12-31
AU4910885A (en) 1986-05-29
FR2572431A1 (en) 1986-05-02

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