ATE21133T1 - PROCESS FOR THE MANUFACTURE OF SEMI-BLEACHED PULP. - Google Patents

PROCESS FOR THE MANUFACTURE OF SEMI-BLEACHED PULP.

Info

Publication number
ATE21133T1
ATE21133T1 AT83100115T AT83100115T ATE21133T1 AT E21133 T1 ATE21133 T1 AT E21133T1 AT 83100115 T AT83100115 T AT 83100115T AT 83100115 T AT83100115 T AT 83100115T AT E21133 T1 ATE21133 T1 AT E21133T1
Authority
AT
Austria
Prior art keywords
semi
manufacture
bleached pulp
hydrogen peroxide
sodium silicate
Prior art date
Application number
AT83100115T
Other languages
German (de)
Inventor
Horst Dr Krueger
Hans Ulrich Dr 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=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ATE21133(T1) "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
Application granted granted Critical
Publication of ATE21133T1 publication Critical patent/ATE21133T1/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)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Investigating Or Analysing Biological Materials (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.
AT83100115T 1982-02-27 1983-01-08 PROCESS FOR THE MANUFACTURE OF SEMI-BLEACHED PULP. ATE21133T1 (en)

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
EP83100115A EP0087553B1 (en) 1982-02-27 1983-01-08 Process for producing half-bleached cellulose pulps

Publications (1)

Publication Number Publication Date
ATE21133T1 true ATE21133T1 (en) 1986-08-15

Family

ID=6156909

Family Applications (1)

Application Number Title Priority Date Filing Date
AT83100115T ATE21133T1 (en) 1982-02-27 1983-01-08 PROCESS FOR THE MANUFACTURE OF SEMI-BLEACHED PULP.

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
DE69007267T2 (en) * 1990-01-05 1994-06-16 Praxair Technology Inc Bleaching 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
CA2239876A1 (en) * 1995-12-07 1997-07-31 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
DE3364788D1 (en) 1986-09-04
EP0087553B1 (en) 1986-07-30
DE3207157C1 (en) 1983-06-09
FI824295L (en) 1983-08-28
NO824357L (en) 1983-08-29
FI824295A0 (en) 1982-12-14
EP0087553A1 (en) 1983-09-07

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Legal Events

Date Code Title Description
REN Ceased due to non-payment of the annual fee
RZN Patent revoked