NZ235754A - Bleaching wood pulp with chlorine dioxide first at ph of 5 to 10 then at ph of 1.9 to 4.2 - Google Patents

Bleaching wood pulp with chlorine dioxide first at ph of 5 to 10 then at ph of 1.9 to 4.2

Info

Publication number
NZ235754A
NZ235754A NZ235754A NZ23575490A NZ235754A NZ 235754 A NZ235754 A NZ 235754A NZ 235754 A NZ235754 A NZ 235754A NZ 23575490 A NZ23575490 A NZ 23575490A NZ 235754 A NZ235754 A NZ 235754A
Authority
NZ
New Zealand
Prior art keywords
chlorine dioxide
wood pulp
bleaching wood
bleaching
pulp
Prior art date
Application number
NZ235754A
Inventor
Chang Hou-Min
Jameel Hasan
Geoffrey Eugene Seger
Original Assignee
Univ North Carolina State
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=23682296&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=NZ235754(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Univ North Carolina State filed Critical Univ North Carolina State
Publication of NZ235754A publication Critical patent/NZ235754A/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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
    • D21C9/142—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 in a multistage process involving ClO2/Cl2 exclusively

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Noodles (AREA)
NZ235754A 1989-10-19 1990-10-18 Bleaching wood pulp with chlorine dioxide first at ph of 5 to 10 then at ph of 1.9 to 4.2 NZ235754A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US42434789A 1989-10-19 1989-10-19

Publications (1)

Publication Number Publication Date
NZ235754A true NZ235754A (en) 1993-03-26

Family

ID=23682296

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ235754A NZ235754A (en) 1989-10-19 1990-10-18 Bleaching wood pulp with chlorine dioxide first at ph of 5 to 10 then at ph of 1.9 to 4.2

Country Status (12)

Country Link
EP (1) EP0496782B1 (en)
CN (1) CN1052157A (en)
AR (1) AR243945A1 (en)
AU (1) AU6537690A (en)
CA (1) CA2069322A1 (en)
DE (1) DE69026105T2 (en)
ES (1) ES2085358T3 (en)
MX (1) MX172853B (en)
NZ (1) NZ235754A (en)
PL (1) PL164745B1 (en)
WO (1) WO1991005909A1 (en)
ZA (1) ZA908341B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5268075A (en) * 1989-10-19 1993-12-07 North Carolina State University High efficiency two-step, high-low pH chlorine dioxide pulp bleaching process
BR9901291B1 (en) * 1999-04-27 2011-11-01 process for bleaching low consistency chemical pulps.
SE524896C2 (en) * 2003-03-07 2004-10-19 Kvaerner Pulping Tech Bleaching of cellulose pulp with chlorine dioxide in two phases with heating between the phases
WO2006126983A1 (en) * 2005-05-04 2006-11-30 Novozymes North America, Inc. Chlorine dioxide treatment compositions and processes
FI122626B (en) * 2006-03-31 2012-04-30 Laennen Tutkimus Western Res Inc Oy Chemical pulp bleaching process
CN103469663B (en) * 2013-08-13 2016-05-04 广西大学 A kind of by response surface method optimization paper pulp ClO 2 bleaching method
FR3062138B1 (en) * 2017-01-23 2019-06-07 Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses PROCESS FOR WHITENING A PAPER PULP
CN111979818A (en) * 2020-08-07 2020-11-24 齐鲁工业大学 Sulfate wood pulp short-procedure ECF bleaching process X/Z/D-EOP-D or X/D/Z-EOP-D

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433702A (en) * 1965-06-28 1969-03-18 Hooker Chemical Corp Woodpulp bleaching process
CA1004805A (en) * 1973-10-18 1977-02-08 Louis O. Torregrossa Non-neutral bleaching of pulp
FR2432574A1 (en) * 1978-08-01 1980-02-29 Europeen Cellulose PROCESS FOR BLEACHING PAPER PULP
SE8106334L (en) * 1981-10-27 1983-04-28 Sunds Defibrator SETTLE TO TREAT CELLULOSIC MATERIAL
CA1239253A (en) * 1983-05-20 1988-07-19 Louis O. Torregrossa Method of chlorine dioxide bleaching

Also Published As

Publication number Publication date
CN1052157A (en) 1991-06-12
AU6537690A (en) 1991-05-16
PL164745B1 (en) 1994-10-31
WO1991005909A1 (en) 1991-05-02
CA2069322A1 (en) 1991-04-20
PL287415A1 (en) 1991-09-23
AR243945A1 (en) 1993-09-30
EP0496782B1 (en) 1996-03-20
ES2085358T3 (en) 1996-06-01
ZA908341B (en) 1991-08-28
EP0496782A1 (en) 1992-08-05
DE69026105D1 (en) 1996-04-25
EP0496782A4 (en) 1993-02-03
MX172853B (en) 1994-01-17
DE69026105T2 (en) 1996-09-26

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