FI853492A0 - FOERFARANDE FOER DELIGNIFIERING AV SULFATCELLULOSER. - Google Patents

FOERFARANDE FOER DELIGNIFIERING AV SULFATCELLULOSER.

Info

Publication number
FI853492A0
FI853492A0 FI853492A FI853492A FI853492A0 FI 853492 A0 FI853492 A0 FI 853492A0 FI 853492 A FI853492 A FI 853492A FI 853492 A FI853492 A FI 853492A FI 853492 A0 FI853492 A0 FI 853492A0
Authority
FI
Finland
Prior art keywords
sulfatcelluloser
foerfarande foer
oxygen
delignifiering
hydrogen peroxide
Prior art date
Application number
FI853492A
Other languages
Finnish (fi)
Other versions
FI853492L (en
Inventor
Horst Krueger
Hans Ulrich 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
Publication of FI853492A0 publication Critical patent/FI853492A0/en
Publication of FI853492L publication Critical patent/FI853492L/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.
FI853492A 1984-12-19 1985-09-12 FOERFARANDE FOER DELIGNIFIERING AV SULFATCELLULOSER. FI853492L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843446301 DE3446301A1 (en) 1984-12-19 1984-12-19 METHOD FOR DELIGNIFYING SULFATE CELLS

Publications (2)

Publication Number Publication Date
FI853492A0 true FI853492A0 (en) 1985-09-12
FI853492L FI853492L (en) 1986-06-20

Family

ID=6253194

Family Applications (1)

Application Number Title Priority Date Filing Date
FI853492A FI853492L (en) 1984-12-19 1985-09-12 FOERFARANDE FOER DELIGNIFIERING AV SULFATCELLULOSER.

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
JPWO2015155924A1 (en) 2014-04-08 2017-04-13 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
JPS58501383A (en) * 1981-09-04 1983-08-18 ウェヤ−ハウザ−・カンパニ− Treatment of pulp with oxygen
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
DE3562496D1 (en) 1988-06-09
NO853688L (en) 1986-06-20
JPS61146894A (en) 1986-07-04
EP0185858B1 (en) 1988-05-04
FI853492L (en) 1986-06-20
DE3446301A1 (en) 1986-06-19
EP0185858A1 (en) 1986-07-02
ATE33998T1 (en) 1988-05-15

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Legal Events

Date Code Title Description
FA Application withdrawn

Owner name: DEGUSSA AKTIENGESELLSCHAFT