ATE33998T1 - PROCESS FOR DELIGNIFICATION OF SULFATE PULP. - Google Patents

PROCESS FOR DELIGNIFICATION OF SULFATE PULP.

Info

Publication number
ATE33998T1
ATE33998T1 AT85112163T AT85112163T ATE33998T1 AT E33998 T1 ATE33998 T1 AT E33998T1 AT 85112163 T AT85112163 T AT 85112163T AT 85112163 T AT85112163 T AT 85112163T AT E33998 T1 ATE33998 T1 AT E33998T1
Authority
AT
Austria
Prior art keywords
delignification
oxygen
sulfate pulp
hydrogen peroxide
pulp
Prior art date
Application number
AT85112163T
Other languages
German (de)
Inventor
Horst Dr Krueger
Hans-Ulrich Dr Suess
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
Application filed by Degussa filed Critical Degussa
Application granted granted Critical
Publication of ATE33998T1 publication Critical patent/ATE33998T1/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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • External Artificial Organs (AREA)

Abstract

1. A two-stage process for the delignification of sulfate pulps produced under alkaline or neutral conditions using oxygen and hydrogen peroxide, characterized in that the pulp is pretreated simultaneously with oxygen and hydrogen peroxide at a pH value of < 5 and then further delignified with oxygen in alkaline medium.
AT85112163T 1984-12-19 1985-09-25 PROCESS FOR DELIGNIFICATION OF SULFATE PULP. ATE33998T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843446301 DE3446301A1 (en) 1984-12-19 1984-12-19 METHOD FOR DELIGNIFYING SULFATE CELLS
EP85112163A EP0185858B1 (en) 1984-12-19 1985-09-25 Process for delignifying sulphate pulp

Publications (1)

Publication Number Publication Date
ATE33998T1 true ATE33998T1 (en) 1988-05-15

Family

ID=6253194

Family Applications (1)

Application Number Title Priority Date Filing Date
AT85112163T ATE33998T1 (en) 1984-12-19 1985-09-25 PROCESS FOR DELIGNIFICATION OF SULFATE PULP.

Country Status (6)

Country Link
EP (1) EP0185858B1 (en)
JP (1) JPS61146894A (en)
AT (1) ATE33998T1 (en)
DE (2) DE3446301A1 (en)
FI (1) FI853492L (en)
NO (1) NO853688L (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0863251A1 (en) * 1997-03-04 1998-09-09 Oji Paper Co., Ltd. Process for producing bleached pulp
US5919238A (en) * 1998-03-04 1999-07-06 Ford Global Technologies, Inc. Method for aligning a vehicle suspension
WO2015155924A1 (en) 2014-04-08 2015-10-15 パナソニックＩｐマネジメント株式会社 Organic el element and lighting device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3719552A (en) * 1971-06-18 1973-03-06 American Cyanamid Co Bleaching of lignocellulosic materials with oxygen in the presence of a peroxide
SE420430B (en) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab PROCEDURE FOR WHEATING AND EXTRACTION OF LIGNOCELLULOSALLY MATERIALS WITH PEROXID CONTAINING BLACKS
US4372812A (en) * 1978-04-07 1983-02-08 International Paper Company Chlorine free process for bleaching lignocellulosic pulp
EP0088073A4 (en) * 1981-09-04 1984-01-09 Weyerhaeuser Co Method of treating pulp with plural oxygen stages.
DE3207157C1 (en) * 1982-02-27 1983-06-09 Degussa Ag, 6000 Frankfurt Process for the production of semi-bleached cellulose

Also Published As

Publication number Publication date
NO853688L (en) 1986-06-20
DE3562496D1 (en) 1988-06-09
FI853492A0 (en) 1985-09-12
JPS61146894A (en) 1986-07-04
FI853492L (en) 1986-06-20
EP0185858B1 (en) 1988-05-04
DE3446301A1 (en) 1986-06-19
EP0185858A1 (en) 1986-07-02

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