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FI824295A7 - Method for preparing semi-bleached celluloses. - Google Patents

Method for preparing semi-bleached celluloses. Download PDF

Info

Publication number
FI824295A7
FI824295A7 FI824295A FI824295A FI824295A7 FI 824295 A7 FI824295 A7 FI 824295A7 FI 824295 A FI824295 A FI 824295A FI 824295 A FI824295 A FI 824295A FI 824295 A7 FI824295 A7 FI 824295A7
Authority
FI
Finland
Prior art keywords
preparing semi
bleached
celluloses
bleached celluloses
semi
Prior art date
Application number
FI824295A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI824295L (en
FI824295A0 (en
Inventor
Horst Krueger
Hans Ulrich Suess
Kurt Schmidt
Original Assignee
Degussa
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=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FI824295(A7) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Degussa filed Critical Degussa
Publication of FI824295A0 publication Critical patent/FI824295A0/en
Publication of FI824295A7 publication Critical patent/FI824295A7/en
Publication of FI824295L publication Critical patent/FI824295L/en

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)
  • 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)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
FI824295A 1982-02-27 1982-12-14 FOERFARANDE FOER FRAMSTAELLNING AV HALVBLEKTA CELLULOSOR FI824295L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3207157A DE3207157C1 (en) 1982-02-27 1982-02-27 Process for the production of semi-bleached cellulose

Publications (3)

Publication Number Publication Date
FI824295A0 FI824295A0 (en) 1982-12-14
FI824295A7 true FI824295A7 (en) 1983-08-28
FI824295L FI824295L (en) 1983-08-28

Family

ID=6156909

Family Applications (1)

Application Number Title Priority Date Filing Date
FI824295A FI824295L (en) 1982-02-27 1982-12-14 FOERFARANDE FOER FRAMSTAELLNING AV HALVBLEKTA CELLULOSOR

Country Status (5)

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

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3428352A1 (en) * 1984-08-01 1986-02-13 Degussa Ag, 6000 Frankfurt METHOD FOR DELIGNIFICATION AND BLEACHING OF CELLULAS
DE3446301A1 (en) * 1984-12-19 1986-06-19 Degussa Ag, 6000 Frankfurt METHOD FOR DELIGNIFYING SULFATE CELLS
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 (en) * 1990-01-05 1994-05-16 Praxair Technology Inc BLEACHING OF TEXTILES WITH OXYGEN AND HYDROGEN PEROXIDE.
ZA924351B (en) * 1991-06-27 1993-03-31 Ahlstroem Oy Ozone bleaching process
BE1005800A3 (en) * 1992-05-22 1994-02-01 Solvay Interox Method for the delignification and bleaching of a chemical paper pulp
FI925159A0 (en) * 1992-11-13 1992-11-13 Ahlstroem Oy FOERFARANDE FOER BLEKNING AV MASSA
SE500616C2 (en) * 1993-06-08 1994-07-25 Kvaerner Pulping Tech Bleaching of chemical pulp with peroxide at overpressure
AU1378695A (en) * 1993-12-28 1995-07-17 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 (en) * 1994-05-11 1996-06-21 Atochem Elf Sa Process for the preparation of delignified and bleached chemical paper pulps.
ZA955190B (en) * 1994-07-11 1996-03-14 Ingersoll Rand Co Method for bleaching wood pulp using hydrogen peroxide
EP0866895B1 (en) * 1995-12-07 2000-06-14 Beloit Technologies, Inc. Oxygen delignification of medium consistency pulp slurry
DE19751173A1 (en) * 1997-11-19 1999-05-27 Voith Sulzer Papiertech Patent Pulp bleaching method especially for recycling used paper materials
RU2744339C1 (en) * 2020-07-20 2021-03-05 федеральное государственное бюджетное образовательное учреждение высшего образования "Пермский национальный исследовательский политехнический университет" Method of bleaching sulphite pulp

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE324285B (en) * 1968-11-22 1970-05-25 T Norin
FI45574C (en) * 1970-05-11 1972-07-10 Kymin Oy Kymmene Ab Process for bleaching cellulosic materials.
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 (en) 1983-08-28
ATE21133T1 (en) 1986-08-15
EP0087553A1 (en) 1983-09-07
DE3207157C1 (en) 1983-06-09
NO824357L (en) 1983-08-29
DE3364788D1 (en) 1986-09-04
FI824295A0 (en) 1982-12-14
EP0087553B1 (en) 1986-07-30

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Legal Events

Date Code Title Description
FA Application withdrawn [patent]

Owner name: DEGUSSA AKTIENGESELLSCHAFT