ES2085358T3 - HIGH EFFICIENCY PROCESS FOR WHITENING CELLULOSE WITH CHLORINE DIOXIDE. - Google Patents

HIGH EFFICIENCY PROCESS FOR WHITENING CELLULOSE WITH CHLORINE DIOXIDE.

Info

Publication number
ES2085358T3
ES2085358T3 ES90915570T ES90915570T ES2085358T3 ES 2085358 T3 ES2085358 T3 ES 2085358T3 ES 90915570 T ES90915570 T ES 90915570T ES 90915570 T ES90915570 T ES 90915570T ES 2085358 T3 ES2085358 T3 ES 2085358T3
Authority
ES
Spain
Prior art keywords
chlorine dioxide
high efficiency
around
efficiency process
mixture
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
ES90915570T
Other languages
Spanish (es)
Inventor
Hou-Min Chang
Geoffrey Eugene Seger
Hasan Jameel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
North Carolina State University
Original Assignee
North Carolina State University
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=ES2085358(T3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by North Carolina State University filed Critical North Carolina State University
Application granted granted Critical
Publication of ES2085358T3 publication Critical patent/ES2085358T3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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)
  • Noodles (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

UN PROCESO DE DECOLORACION DE PULPA DE MADERA DE GRAN EFICACIA PARA PRODUCIR PULPAS DE MADERA CON UN BRILLO MAYOR UTILIZANDO LA MISMA DOSIS DE DIOXIDO DE CLORO O DE UN BRILLO IGUAL UTILIZANDO UNA DOSIS SIGNIFICANTEMENTE REDUCIDA DE DIOXIDO DE CLORO. EL PROCESO COMPRENDE EL SOMETER A REACCION EL DIOXIDO DE CLORO CON PULPA DE MADERA EN UN PH DE 5-10 DURANTE ALREDEDOR DE 5-40 MINUTOS Y DESPUES ACIDIFICAR LA MEZCLA A UN PH DE ALREDEDOR DE 1.9-4.2. DESPUES SE PERMITE A LA MEZCLA QUE REACCIONE DURANTE ALREDEDOR DE 2 HORAS O MAS PARA COMPLETAR EL PROCESO DE DECOLORACION DE DOS PASOS DE PH ALTO/BAJO.A HIGHLY EFFECTIVE WOODEN PULP DECOLORATION PROCESS FOR PRODUCING WOODEN PULP WITH A GREATER BRIGHTNESS USING THE SAME DOSE OF CHLORINE DIOXIDE OR A SAME BRIGHTNESS USING A SIGNIFICANTLY REDUCED DOSE OF CHLORINE DIOXIDE. THE PROCESS INCLUDES SUBMITTING TO REACTION THE CHLORINE DIOXIDE WITH WOOD PULP IN A PH OF 5-10 DURING AROUND 5-40 MINUTES AND THEN ACIDIFYING THE MIXTURE TO A PH OF AROUND 1.9-4.2. THEN THE MIXTURE IS ALLOWED TO REACT FOR AROUND 2 HOURS OR MORE TO COMPLETE THE HIGH / LOW PH TWO-STEP DECOLORATION PROCESS.

ES90915570T 1989-10-19 1990-10-17 HIGH EFFICIENCY PROCESS FOR WHITENING CELLULOSE WITH CHLORINE DIOXIDE. Expired - Lifetime ES2085358T3 (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
ES2085358T3 true ES2085358T3 (en) 1996-06-01

Family

ID=23682296

Family Applications (1)

Application Number Title Priority Date Filing Date
ES90915570T Expired - Lifetime ES2085358T3 (en) 1989-10-19 1990-10-17 HIGH EFFICIENCY PROCESS FOR WHITENING CELLULOSE WITH CHLORINE DIOXIDE.

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
CN101171386B (en) * 2005-05-04 2011-11-16 诺维信北美公司 Chlorine dioxide treatment compositions and methods
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
PL164745B1 (en) 1994-10-31
EP0496782A1 (en) 1992-08-05
EP0496782A4 (en) 1993-02-03
DE69026105T2 (en) 1996-09-26
PL287415A1 (en) 1991-09-23
AR243945A1 (en) 1993-09-30
DE69026105D1 (en) 1996-04-25
ZA908341B (en) 1991-08-28
CN1052157A (en) 1991-06-12
NZ235754A (en) 1993-03-26
MX172853B (en) 1994-01-17
WO1991005909A1 (en) 1991-05-02
EP0496782B1 (en) 1996-03-20
AU6537690A (en) 1991-05-16
CA2069322A1 (en) 1991-04-20

Similar Documents

Publication Publication Date Title
NZ189614A (en) Delignification of cellulosic chips using parallel meshing screws
ES2063254T3 (en) DELIGNIFICATION WITH OXYGEN AND ENZYMATIC TREATMENT.
ES2085358T3 (en) HIGH EFFICIENCY PROCESS FOR WHITENING CELLULOSE WITH CHLORINE DIOXIDE.
FI852505L (en) METHOD FOR EXPLORATION OF AV LIGNIN OR BLEKNING AV CELLULOSA.
SE7608696L (en) WAY TO PRODUCE CELLULOSIS-CONTAINING MASSES IN HIGH YIELD AND AT LEGAL COST
NZ220857A (en) Preparation of individualised, crosslinked, cellulosic fibers
FI873234L (en) BLEKNINGSFOERFARANDE OCH -SAMMANSAETTNING.
RU94041701A (en) Method for increasing whiteness of wood pulp and hard pulp with high yield
FI891248L (en) Method for simultaneous grinding and bleaching of wood pulp
ATE69953T1 (en) USE OF POLYSULFATED HEPARINS.
NO932200L (en) Procedure for bleaching pulp
FI906076A0 (en) A process for bleaching chemical cellulosic pulps to produce bleached absorbent pulps
NZ194821A (en) Absorbent fibrous batt of non-delignified wood pulp fibres
ES420507A1 (en) Delignification and bleaching of wood pulp with oxygen in the presence of triethanolamine
FI860688A0 (en) FLERSTEGSPEROXIDBLEKNING AV MECHANICAL MASS.
FI882769L (en) STYRNING AV PEROXIDBLEKNING AV OLIKA TRAEMASSOR.
RU93058344A (en) HIGH EFFICIENCY METHOD OF BLEACHING CHLORIDE PULP PULP
ATE151824T1 (en) DIGESTATION PROCESS
EP0576541A4 (en) High efficiency chlorine dioxide pulp bleaching process
SE8903710D0 (en) SET TO MAKE CELLULOUS MASS
FI895394A0 (en) Phosphate compositions and their use
ZA806518B (en) Flameproofing of hardwood by a low-pressure process
AU2202188A (en) Method of bleaching or delignification of cellulose pulp with oxygen
FR2066674A5 (en) Paper contg some unbeaten fibres
RO102619B1 (en) Alkaline treatment method to 100% cellulose fibre cloth

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 496782

Country of ref document: ES