ES458434A1 - Procedimiento para la deslignificacion de material lignoce- lulosico. - Google Patents

Procedimiento para la deslignificacion de material lignoce- lulosico.

Info

Publication number
ES458434A1
ES458434A1 ES458434A ES458434A ES458434A1 ES 458434 A1 ES458434 A1 ES 458434A1 ES 458434 A ES458434 A ES 458434A ES 458434 A ES458434 A ES 458434A ES 458434 A1 ES458434 A1 ES 458434A1
Authority
ES
Spain
Prior art keywords
treatment
dioxide
delignification
alkali
stages
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
Application number
ES458434A
Other languages
English (en)
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.)
PPG Architectural Coatings Canada Inc
Original Assignee
Canadian Industries Ltd
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 Canadian Industries Ltd filed Critical Canadian Industries Ltd
Publication of ES458434A1 publication Critical patent/ES458434A1/es
Expired 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
    • D21C9/1057—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)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

Procedimiento para la deslignificación de material lignocelulósico, caracterizado porque comprende las etapas de: 1) tratar el material lignocelulósico en un medio acuoso con dióxido de nitrógeno; 2) lavar el material tratado con dióxido de nitrógeno con agua; 3) tratar el material lavado en medio acuoso con un material alcalino; y 4) tratar el material tratado con material alcalino con oxígeno o un gas que contiene oxígeno a presión supra-atmosférica.
ES458434A 1976-05-04 1977-05-04 Procedimiento para la deslignificacion de material lignoce- lulosico. Expired ES458434A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA251,752A CA1070909A (en) 1976-05-04 1976-05-04 Nitrogen dioxide-oxygen delignification

Publications (1)

Publication Number Publication Date
ES458434A1 true ES458434A1 (es) 1978-03-16

Family

ID=4105864

Family Applications (1)

Application Number Title Priority Date Filing Date
ES458434A Expired ES458434A1 (es) 1976-05-04 1977-05-04 Procedimiento para la deslignificacion de material lignoce- lulosico.

Country Status (12)

Country Link
JP (1) JPS52134690A (es)
AU (1) AU498646B2 (es)
BR (1) BR7702713A (es)
CA (1) CA1070909A (es)
DE (1) DE2717257A1 (es)
ES (1) ES458434A1 (es)
FI (1) FI771383A (es)
FR (1) FR2350421A1 (es)
NO (1) NO771297L (es)
NZ (1) NZ183555A (es)
SE (1) SE7705136L (es)
ZA (1) ZA771424B (es)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE441192B (sv) * 1980-05-27 1985-09-16 Mo Och Domsjoe Ab Forfarande for delignifiering av kemisk cellulosamassa med syrgas i nervaro av ett eller flera neutralisationsmedel
SE421938B (sv) * 1980-06-05 1982-02-08 Mo Och Domsjoe Ab Forfarande for behandling av cellulosamassa med kveveoxider fore syrgasblekning
SE445122B (sv) * 1980-12-17 1986-06-02 Mo Och Domsjoe Ab Forfarande for delignifiering av cellulosamassa i nervaro av kvevedioxid
SE425674B (sv) * 1981-03-23 1982-10-25 Mo Och Domsjoe Ab Forfarande for delignifiering av cellulosamassa med kvevedioxid och syrgas
DE3118384C1 (de) * 1981-05-09 1982-11-11 Mannesmann AG, 4000 Düsseldorf Verfahren zum Bleichen von chemisch hergestelltem Zellstoff mit Ozon
SE448006B (sv) * 1981-09-21 1987-01-12 Mo Och Domsjoe Ab Forfarande for blekning av cellulosamassa innefattande ett aktiveringssteg med kveveoxider
SE450394B (sv) * 1981-12-30 1987-06-22 Mo Och Domsjoe Ab Forfarande for blekning av ligninhaltig cellulosamassa
JP2002302888A (ja) * 2001-04-05 2002-10-18 Oji Paper Co Ltd 漂白パルプの製造方法
FI20115754A0 (fi) * 2011-03-22 2011-07-15 Andritz Oy Menetelmä ja järjestely kemiallisen massan käsittelemiseksi

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1505070A (en) * 1974-06-11 1978-03-22 Canadian Ind Process for bleaching of lignocellulosic material

Also Published As

Publication number Publication date
SE7705136L (sv) 1977-11-05
NO771297L (no) 1977-11-07
ZA771424B (en) 1978-02-22
AU498646B2 (en) 1979-03-22
FR2350421A1 (fr) 1977-12-02
AU2311177A (en) 1978-09-14
NZ183555A (en) 1978-11-13
FI771383A (es) 1977-11-05
JPS52134690A (en) 1977-11-11
DE2717257A1 (de) 1977-11-17
CA1070909A (en) 1980-02-05
FR2350421B1 (es) 1982-08-13
BR7702713A (pt) 1978-03-21

Similar Documents

Publication Publication Date Title
ES425711A1 (es) Procedimiento para la desliquificacion de un material lig- nocelulosico.
ES458434A1 (es) Procedimiento para la deslignificacion de material lignoce- lulosico.
FR2265908A1 (en) Kraft pulp bleaching and recovery process - using alkali extraction effluents in subsequent bleaching steps
DE68924793D1 (de) Verfahren zum Bleichen von mechanischem Holzstoff.
ES8704569A1 (es) Procedimiento de disgregacion con sulfito para la preparacion de celulosa a partir de materiales que contienen lignocelulosa con recuperacion de los productos quimicos de disgregacion
GB1434232A (en) Method of producing cellulose pulp by means of oxygen gas delignification
SE8003911L (sv) Forfarande for syrgasblekning av cellulosamassa
GB1100709A (en) Two-stage purification of fibrous cellulose material
US2772240A (en) Method of treating residual liquors obtained in the manufacture of pulp by the sulphate cellulose process
GB1505070A (en) Process for bleaching of lignocellulosic material
US1557338A (en) Method of producing half stuffs and cellulose
ES443318A1 (es) Procedimiento mejorado de varias etapas para el blanqueo to-tal, con poco consumo de cloro, de celulosa.
FR2158873A5 (en) Bleaching of wood cellulose - using nitrogen oxides
US4115186A (en) Process for bleaching cellulose pulp with molecular oxygen
GB1229269A (es)
GB1119546A (en) Improved method of treating fibrous material
SU469782A1 (ru) Способ отбелки целлюлозы
FR2256283A1 (en) Delignification of lignocellulosic material for paper - with alkali metal hydroxide, oxygen and opt. alkali metal sulphide
US4010112A (en) Production of aqueous solutions of chlorine dioxide and chlorine
GB758766A (en) Process for the production of pulp from bagasse
US4165253A (en) Process for producing pulp
Lincoln et al. METHOD OF BLEACHING WOOD PULP
GB1253234A (es)
ATE48291T1 (de) Verfahren zum bleichen von chemischen holzpulpen.
SU429156A1 (ru) Способ получения целлюлозы

Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19991007