ZA90260B - A process for bleaching paper stock - Google Patents

A process for bleaching paper stock

Info

Publication number
ZA90260B
ZA90260B ZA90260A ZA90260A ZA90260B ZA 90260 B ZA90260 B ZA 90260B ZA 90260 A ZA90260 A ZA 90260A ZA 90260 A ZA90260 A ZA 90260A ZA 90260 B ZA90260 B ZA 90260B
Authority
ZA
South Africa
Prior art keywords
paper stock
bleaching paper
bleaching
stock
paper
Prior art date
Application number
ZA90260A
Other languages
English (en)
Inventor
Wilfried Eul
Eul Wilfried
Hans Ulrich Suess
Ulrich Suess Hans
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 ZA90260B publication Critical patent/ZA90260B/xx

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
    • D21C9/1084—Bleaching ; Apparatus therefor with reducing compounds
    • 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
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/02—Working-up waste paper
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
ZA90260A 1989-01-27 1990-01-15 A process for bleaching paper stock ZA90260B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893902423 DE3902423A1 (de) 1989-01-27 1989-01-27 Verfahren zur bleiche von faserstoffen zur papierherstellung

Publications (1)

Publication Number Publication Date
ZA90260B true ZA90260B (en) 1990-10-31

Family

ID=6372923

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA90260A ZA90260B (en) 1989-01-27 1990-01-15 A process for bleaching paper stock

Country Status (7)

Country Link
EP (1) EP0379858A3 (fr)
JP (1) JPH02234991A (fr)
AU (1) AU4687789A (fr)
CA (1) CA2008678A1 (fr)
DE (1) DE3902423A1 (fr)
FI (1) FI900236A0 (fr)
ZA (1) ZA90260B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5958184A (en) * 1992-06-10 1999-09-28 Mitsubishi Gas Chemical Company Inc. Process for producing thiourea dioxide
GB9214041D0 (en) * 1992-07-02 1992-08-12 Morton Int Inc Process for de-inking recycled paper pulp
US6153300A (en) * 1994-04-18 2000-11-28 Ahlstrom Machinery, Inc. Bleaching cellulose pulp having cleanliness which varies significantly over time using at least two different bleaching stages and bleaching chemicals

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1404315A (en) * 1971-09-15 1975-08-28 Albright & Wilson Production of bleached high yield pulp
DE3309956C1 (de) * 1983-03-19 1984-07-12 Degussa Ag, 6000 Frankfurt Verfahren zum Bleichen von Papierrohstoffen

Also Published As

Publication number Publication date
DE3902423A1 (de) 1990-08-02
EP0379858A2 (fr) 1990-08-01
JPH02234991A (ja) 1990-09-18
CA2008678A1 (fr) 1990-07-27
FI900236A0 (fi) 1990-01-16
EP0379858A3 (fr) 1991-01-16
AU4687789A (en) 1990-08-02

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