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AU576394B2 - Process for the preparation of chemical paper pulp for bleaching - Google Patents

Process for the preparation of chemical paper pulp for bleaching

Info

Publication number
AU576394B2
AU576394B2 AU49108/85A AU4910885A AU576394B2 AU 576394 B2 AU576394 B2 AU 576394B2 AU 49108/85 A AU49108/85 A AU 49108/85A AU 4910885 A AU4910885 A AU 4910885A AU 576394 B2 AU576394 B2 AU 576394B2
Authority
AU
Australia
Prior art keywords
bleaching
preparation
paper pulp
chemical paper
pulp
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.)
Ceased
Application number
AU49108/85A
Other versions
AU4910885A (en
Inventor
Christian De Choudens
Dominique 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=AU576394(B2) "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 AU4910885A publication Critical patent/AU4910885A/en
Application granted granted Critical
Publication of AU576394B2 publication Critical patent/AU576394B2/en
Anticipated expiration legal-status Critical
Ceased 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)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (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.
AU49108/85A 1984-10-25 1985-10-25 Process for the preparation of chemical paper pulp for bleaching Ceased AU576394B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8416518 1984-10-25
FR8416518A FR2572431B1 (en) 1984-10-25 1984-10-25 PROCESS FOR THE PREPARATION OF CHEMICAL PAPER PULP FOR BLEACHING.

Publications (2)

Publication Number Publication Date
AU4910885A AU4910885A (en) 1986-05-29
AU576394B2 true AU576394B2 (en) 1988-08-25

Family

ID=9309092

Family Applications (1)

Application Number Title Priority Date Filing Date
AU49108/85A Ceased AU576394B2 (en) 1984-10-25 1985-10-25 Process for the preparation of chemical paper pulp for 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)

Citations (2)

* 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
US4402788A (en) * 1982-04-26 1983-09-06 Champion International Corporation Process for bleaching wood pulp with hydrogen peroxide

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (2)

* 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
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
AU4910885A (en) 1986-05-29
DE3563548D1 (en) 1988-08-04
ES8606557A1 (en) 1986-04-01
EP0180529A1 (en) 1986-05-07
EP0180529B2 (en) 1992-04-08
JPS61102495A (en) 1986-05-21
DE180529T1 (en) 1986-12-18
FI82726B (en) 1990-12-31
FI854148A0 (en) 1985-10-23
ATE35433T1 (en) 1988-07-15
EP0180529B1 (en) 1988-06-29
FR2572431B1 (en) 1987-12-04
ES548166A0 (en) 1986-04-01
FI82726C (en) 1991-04-10
FI854148L (en) 1986-04-26
FR2572431A1 (en) 1986-05-02
CA1273755A (en) 1990-09-11

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