DE3667184D1 - METHOD FOR BLEACHING CHEMICAL WOOD PULPS. - Google Patents

METHOD FOR BLEACHING CHEMICAL WOOD PULPS.

Info

Publication number
DE3667184D1
DE3667184D1 DE8686420266T DE3667184T DE3667184D1 DE 3667184 D1 DE3667184 D1 DE 3667184D1 DE 8686420266 T DE8686420266 T DE 8686420266T DE 3667184 T DE3667184 T DE 3667184T DE 3667184 D1 DE3667184 D1 DE 3667184D1
Authority
DE
Germany
Prior art keywords
pulp
alkaline extraction
treatment
bleaching chemical
chlorine dioxide
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.)
Revoked
Application number
DE8686420266T
Other languages
German (de)
Inventor
Lucien Bourson
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=9324477&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3667184(D1) "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
Application granted granted Critical
Publication of DE3667184D1 publication Critical patent/DE3667184D1/en
Anticipated expiration legal-status Critical
Revoked 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

1. Process for bleaching chemical papermaking pulps in a bleaching sequence including, in succession, a treatment of the pulp by means of chlorine and chlorine dioxide acting in a single bath, a first alkaline extraction by means of sodium hydroxide, a treatment of the pulp by means of chlorine dioxide, a second alkaline extraction by means of sodium hydroxide and again a treatment of the pulp by means of chlorine dioxide, characterized in that the pulp is subjected at the same time to the action of oxygen during the first alkaline extraction and to the action of hydrogen peroxide during the second alkaline extraction.
DE8686420266T 1985-10-30 1986-10-28 METHOD FOR BLEACHING CHEMICAL WOOD PULPS. Revoked DE3667184D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8516332A FR2589494B1 (en) 1985-10-30 1985-10-30 PROCESS FOR BLEACHING CHEMICAL PAPER PULP

Publications (1)

Publication Number Publication Date
DE3667184D1 true DE3667184D1 (en) 1990-01-04

Family

ID=9324477

Family Applications (2)

Application Number Title Priority Date Filing Date
DE198686420266T Pending DE222674T1 (en) 1985-10-30 1986-10-28 METHOD FOR BLEACHING CHEMICAL WOOD PULPS.
DE8686420266T Revoked DE3667184D1 (en) 1985-10-30 1986-10-28 METHOD FOR BLEACHING CHEMICAL WOOD PULPS.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE198686420266T Pending DE222674T1 (en) 1985-10-30 1986-10-28 METHOD FOR BLEACHING CHEMICAL WOOD PULPS.

Country Status (11)

Country Link
EP (1) EP0222674B1 (en)
JP (1) JPS62141188A (en)
AT (1) ATE48291T1 (en)
AU (1) AU603556B2 (en)
DE (2) DE222674T1 (en)
ES (1) ES2000019B3 (en)
FI (1) FI85294B (en)
FR (1) FR2589494B1 (en)
NO (1) NO864319L (en)
PT (1) PT83649B (en)
ZA (1) ZA868275B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4031597A1 (en) * 1990-10-05 1992-04-09 Sueddeutsche Kalkstickstoff METHOD FOR LOW-CHLORINE BLEACHING AND DELIGNIFICATION OF CELLULAR
US6569284B1 (en) * 1996-09-24 2003-05-27 International Paper Company Elemental-chlorine-free bleaching process having an initial Eo or Eop stage
FR3062138B1 (en) * 2017-01-23 2019-06-07 Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses PROCESS FOR WHITENING A PAPER PULP

Also Published As

Publication number Publication date
NO864319D0 (en) 1986-10-29
FI864411A0 (en) 1986-10-29
NO864319L (en) 1987-05-04
DE222674T1 (en) 1987-10-15
PT83649A (en) 1986-11-01
FI864411A (en) 1987-05-01
EP0222674A1 (en) 1987-05-20
ATE48291T1 (en) 1989-12-15
EP0222674B1 (en) 1989-11-29
PT83649B (en) 1989-05-31
AU603556B2 (en) 1990-11-22
ES2000019B3 (en) 1990-03-16
ZA868275B (en) 1987-06-24
FR2589494A1 (en) 1987-05-07
AU6449286A (en) 1987-05-07
JPH0116958B2 (en) 1989-03-28
FR2589494B1 (en) 1988-07-29
ES2000019A4 (en) 1987-09-16
FI85294B (en) 1991-12-13
JPS62141188A (en) 1987-06-24

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8331 Complete revocation