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
German (de)
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=google_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/en
Application granted granted Critical
Publication of DE3364788D1 publication Critical patent/DE3364788D1/en
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)
  • 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)

Abstract

1. A process for the production of half-bleached cellulose pulps by applying excess oxygen pressure, hydrogen peroxide and sodium silicate in an aqueous alkaline suspension, characterised in that for bleaching and partial delignification, oxygen, hydrogen peroxide and sodium silicate are simultaneously allowed to act on the cellulose pulp.
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 (en) 1982-02-27 1982-02-27 Process for the production of semi-bleached cellulose
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 (en) 1982-02-27 1982-02-27 Process for the production of semi-bleached cellulose
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 (en) 1982-02-27 1982-02-27 Process for the production of semi-bleached cellulose

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
SE9301960L (en) * 1993-06-08 1994-07-25 Kvaerner Pulping Tech Bleaching of chemical pulp with peroxide at overpressure
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 (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
FI824295A0 (en) 1982-12-14
FI824295L (en) 1983-08-28
DE3207157C1 (en) 1983-06-09
EP0087553B1 (en) 1986-07-30
EP0087553A1 (en) 1983-09-07
NO824357L (en) 1983-08-29
ATE21133T1 (en) 1986-08-15

Similar Documents

Publication Publication Date Title
DE3364788D1 (en) Process for producing half-bleached cellulose pulps
DE3561165D1 (en) Process for bleaching mechanical pulp with hydrogen peroxide
GB2215350B (en) Process for bleaching mechanical wood pulp
NZ196664A (en) Process for oxygen bleaching cellulose pulp
CA2066316A1 (en) Process for making bleached high yield paper pulp
SE8100650L (en) SET TO BLOW LIGNOCELLULOSAMASSA
FI911118A0 (en) Process for preparing high yield masses
SE8200756L (en) SET TO MAKE CHEMICAL PAPER PAPER
AU565124B2 (en) Hypochlorite treatment of chemical paper pulps
ES8603606A1 (en) Digestion process and apparatus for the production of high-quality pulp
FR2398839A1 (en) Kraft type paper pulp prepn. without sulphur pollutants - by treating shavings with sodium hydroxide followed by stabilised peroxide
ZA868275B (en) Process for bleaching chemical paper pulp
SE8700313L (en) PROCEDURE FOR WHEATING OF MECHANICAL MASSES
SE9002001L (en) METHOD FOR SUPPLYING WATER PEROXIDE IN CELLULOSA PENSIONS
SE8204431D0 (en) PROCEDURE FOR SEMI-CHEMICAL MASS MANUFACTURE WITH RE-USE OF THE END
ES2049165A1 (en) Pre-bleaching and de-lignification of kraft paper paste - using oxygen@ with white liquid as alkali source

Legal Events

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