DE3364788D1 - Process for producing half-bleached cellulose pulps - Google Patents

Process for producing half-bleached cellulose pulps

Info

Publication number
DE3364788D1
DE3364788D1 DE8383100115T DE3364788T DE3364788D1 DE 3364788 D1 DE3364788 D1 DE 3364788D1 DE 8383100115 T DE8383100115 T DE 8383100115T DE 3364788 T DE3364788 T DE 3364788T DE 3364788 D1 DE3364788 D1 DE 3364788D1
Authority
DE
Germany
Prior art keywords
bleached cellulose
cellulose pulps
producing half
hydrogen peroxide
sodium silicate
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.)
Expired
Application number
DE8383100115T
Other languages
English (en)
Inventor
Horst Dr Kruger
Hans Ulrich Dr Suss
Kurt Schmidt
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
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=6156909&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3364788(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Degussa GmbH filed Critical Degussa GmbH
Priority to DE8383100115T priority Critical patent/DE3364788D1/de
Application granted granted Critical
Publication of DE3364788D1 publication Critical patent/DE3364788D1/de
Expired 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
    • 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
    • D21C9/1068—Bleaching ; Apparatus therefor with O2
    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
DE8383100115T 1982-02-27 1983-01-08 Process for producing half-bleached cellulose pulps Expired DE3364788D1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8383100115T DE3364788D1 (en) 1982-02-27 1983-01-08 Process for producing half-bleached cellulose pulps

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3207157A DE3207157C1 (de) 1982-02-27 1982-02-27 Verfahren zur Herstellung von halbgebleichten Zellstoffen
DE8383100115T DE3364788D1 (en) 1982-02-27 1983-01-08 Process for producing half-bleached cellulose pulps

Publications (1)

Publication Number Publication Date
DE3364788D1 true DE3364788D1 (en) 1986-09-04

Family

ID=6156909

Family Applications (2)

Application Number Title Priority Date Filing Date
DE3207157A Expired DE3207157C1 (de) 1982-02-27 1982-02-27 Verfahren zur Herstellung von halbgebleichten Zellstoffen
DE8383100115T Expired DE3364788D1 (en) 1982-02-27 1983-01-08 Process for producing half-bleached cellulose pulps

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE3207157A Expired DE3207157C1 (de) 1982-02-27 1982-02-27 Verfahren zur Herstellung von halbgebleichten Zellstoffen

Country Status (5)

Country Link
EP (1) EP0087553B1 (de)
AT (1) ATE21133T1 (de)
DE (2) DE3207157C1 (de)
FI (1) FI824295L (de)
NO (1) NO824357L (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3428352A1 (de) * 1984-08-01 1986-02-13 Degussa Ag, 6000 Frankfurt Verfahren zur delignifizierung und bleiche von zellstoffen
DE3446301A1 (de) * 1984-12-19 1986-06-19 Degussa Ag, 6000 Frankfurt Verfahren zur delignifizierung von sulfatzellstoffen
CA1251903A (en) * 1985-06-17 1989-04-04 Pulp And Paper Research Institute Of Canada Alkaline-peroxide-oxygen treatment of unbleached and chlorinated chemical pulps
US5011572A (en) * 1989-05-19 1991-04-30 Fmc Corporation Two stage process for the oxygen delignification of lignocellulosic fibers with peroxide reinforcement in the first stage
ES2050278T3 (es) * 1990-01-05 1994-05-16 Praxair Technology Inc Blanqueo de textiles con oxigeno y peroxido de hidrogeno.
ZA924351B (en) * 1991-06-27 1993-03-31 Ahlstroem Oy Ozone bleaching process
BE1005800A3 (fr) * 1992-05-22 1994-02-01 Solvay Interox Procede pour la delignification et le blanchiment d'une pate a papier chimique.
FI925159A0 (fi) * 1992-11-13 1992-11-13 Ahlstroem Oy Foerfarande foer blekning av massa
SE9301960L (sv) * 1993-06-08 1994-07-25 Kvaerner Pulping Tech Blekning av kemisk massa med peroxid vid övertryck
WO1995018260A1 (en) * 1993-12-28 1995-07-06 Mauvin Material And Chemical Processing Limited Process for delignifying virgin and post-consumer used ligno-cellulosic plant meterials for the purpose of preparing cellulosic fiber, free sugars and lignin by-products
FR2719854B1 (fr) * 1994-05-11 1996-06-21 Atochem Elf Sa Procédé de préparation de pâtes à papier chimiques délignifiées et blanchies.
ZA955190B (en) * 1994-07-11 1996-03-14 Ingersoll Rand Co Method for bleaching wood pulp using hydrogen peroxide
EP0866895B1 (de) * 1995-12-07 2000-06-14 Beloit Technologies, Inc. Delignifizierung eines papierzellstoffs mittlerer konsistenz mittels sauerstoff
DE19751173A1 (de) * 1997-11-19 1999-05-27 Voith Sulzer Papiertech Patent Verfahren zur Erhöhung des Weißgrades von Papierfaserstoff
RU2744339C1 (ru) * 2020-07-20 2021-03-05 федеральное государственное бюджетное образовательное учреждение высшего образования "Пермский национальный исследовательский политехнический университет" Способ отбелки сульфитной целлюлозы

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE324285B (de) * 1968-11-22 1970-05-25 T Norin
FI45574C (fi) * 1970-05-11 1972-07-10 Kymin Oy Kymmene Ab Menetelmä selluloosapitoisten aineiden valkaisemiseksi.
US3832276A (en) * 1973-03-07 1974-08-27 Int Paper Co Delignification and bleaching of a cellulose pulp slurry with oxygen
JPS5138508A (en) * 1974-09-25 1976-03-31 Harusuke Hayashi Parupuno sansosankaseisei niokeru hogozai
US3951733A (en) * 1974-11-06 1976-04-20 International Paper Company Delignification and bleaching of wood pulp with oxygen

Also Published As

Publication number Publication date
FI824295L (fi) 1983-08-28
ATE21133T1 (de) 1986-08-15
EP0087553B1 (de) 1986-07-30
NO824357L (no) 1983-08-29
DE3207157C1 (de) 1983-06-09
FI824295A0 (fi) 1982-12-14
EP0087553A1 (de) 1983-09-07

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8339 Ceased/non-payment of the annual fee