ES8503757A1 - Un metodo para mejorar la brillantez de una pulpa termomecanica. - Google Patents

Un metodo para mejorar la brillantez de una pulpa termomecanica.

Info

Publication number
ES8503757A1
ES8503757A1 ES531729A ES531729A ES8503757A1 ES 8503757 A1 ES8503757 A1 ES 8503757A1 ES 531729 A ES531729 A ES 531729A ES 531729 A ES531729 A ES 531729A ES 8503757 A1 ES8503757 A1 ES 8503757A1
Authority
ES
Spain
Prior art keywords
thermo
bleaching agent
bleach
pressure
mechanical digestion
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
ES531729A
Other languages
English (en)
Other versions
ES531729A0 (es
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.)
Process Evaluation and Development Corp
Original Assignee
Process Evaluation and Development Corp
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 Process Evaluation and Development Corp filed Critical Process Evaluation and Development Corp
Publication of ES8503757A1 publication Critical patent/ES8503757A1/es
Publication of ES531729A0 publication Critical patent/ES531729A0/es
Granted legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/36—Explosive disintegration by sudden pressure reduction
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/14—Disintegrating in mills
    • D21B1/16—Disintegrating in mills in the presence of chemical agents
    • 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
    • D21C9/1026—Other features in bleaching processes

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paper (AREA)

Abstract

PROCEDIMIENTO DE PREPARACION ERMOMECANICO DE PULPAS BRILLANTES PARA FABRICACION DE PAPEL.SE EMPLEA UNA TECNICA DE SUCESIVAS REDUCCIONES REPENTINAS DE PRESION EN PRESENCIA DE UN BLANQUEADOR. LAS FIBRAS CON BLANQUEADOR SE SOMETEN A UNA PRESION DE VAPOR ENTRE 1 Y 15 KG/CM, REDUCIENDOSE LA PRESION EN ESCALONES DE, AL MENOS, 0,5 KG/CM, AN/ADIENDOSE BLANQUEADOR ANTES DE UNA O MAS REDUCCIONES DE PRESION. LAS FIBRAS SE SELECCIONAN ENTRE MADERA, BAMBU, BAGAZO, PAJA Y EUCALIPTUS, UTILIZANDOSE COMO BLANQUEADOR ALGUNO DEL GRUPO DEL PEROXIDO DE HIDROGENO, OZONO, OXIGENO, PEROXIDO DE SODIO, BISULFITO DE SODIO Y BISULFITO DE ZINC.
ES531729A 1983-05-23 1984-04-18 Un metodo para mejorar la brillantez de una pulpa termomecanica. Granted ES531729A0 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US49689283A 1983-05-23 1983-05-23

Publications (2)

Publication Number Publication Date
ES8503757A1 true ES8503757A1 (es) 1985-03-01
ES531729A0 ES531729A0 (es) 1985-03-01

Family

ID=23974632

Family Applications (1)

Application Number Title Priority Date Filing Date
ES531729A Granted ES531729A0 (es) 1983-05-23 1984-04-18 Un metodo para mejorar la brillantez de una pulpa termomecanica.

Country Status (9)

Country Link
JP (1) JPS59216994A (es)
AU (1) AU570673B2 (es)
BR (1) BR8305924A (es)
EG (1) EG16660A (es)
ES (1) ES531729A0 (es)
FR (1) FR2546545B1 (es)
IN (1) IN160270B (es)
PH (1) PH22203A (es)
ZA (1) ZA837927B (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3610940A1 (de) * 1986-03-04 1987-09-10 Escher Wyss Gmbh Hochtemperatur-hochkonsistenz-schnellbleiche
FR2701274B1 (fr) * 1993-02-09 1995-03-31 Air Liquide Procédé de fabrication de pâtes à papier chimicothermomécaniques blanchies (CTMP).
JP2005290331A (ja) 2004-04-06 2005-10-20 Shinto Fine Co Ltd 抗アレルゲン組成物及びアレルゲン不活性化方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB818828A (en) * 1956-07-10 1959-08-26 Scott Paper Co Process for bleaching cellulosic pulp
FI42161C (fi) * 1963-04-03 1970-05-11 Defibrator Ab Tapa mekaanisten ja puolikemiallisten massojen valmistamiseksi jatkuvasti lignoselluloosapitoisesta aineesta
FR1401560A (fr) * 1964-05-29 1965-06-04 Defibrator Ab Procédé de fabrication de pâtes cellulosiques à partir de copeaux dans un appareil défibreur
US3467574A (en) * 1966-06-14 1969-09-16 Crown Zellerbach Corp Refiner bleaching of high yield pulps
FI61215B (fi) * 1976-11-23 1982-02-26 Defibrator Ab Saett och anordning att kontinuerligt framstaella lignocellulosahaltiga fibermaterial
SE420329C (sv) * 1978-02-16 1984-10-15 Mo Och Domsjoe Ab Forfarande for framstellning av slipmassa vid overtryck
SE422818B (sv) * 1978-03-31 1982-03-29 Modo Chemetrics Ab Forfarande for foredling av allulosamassa genom blekning eller extrahering
US4363697A (en) * 1979-12-03 1982-12-14 The Black Clawson Company Method for medium consistency oxygen delignification of pulp
US4347101A (en) * 1980-11-24 1982-08-31 W. R. Grace & Co. Process for producing newsprint
US4431480A (en) * 1981-10-27 1984-02-14 The Black Clawson Company Method and apparatus for controlled addition of alkaline chemicals to an oxygen delignification reaction

Also Published As

Publication number Publication date
ZA837927B (en) 1985-01-30
FR2546545A1 (fr) 1984-11-30
AU570673B2 (en) 1988-03-24
EG16660A (en) 1991-12-30
JPS59216994A (ja) 1984-12-07
FR2546545B1 (fr) 1986-10-24
PH22203A (en) 1988-06-28
AU2540184A (en) 1984-11-29
IN160270B (es) 1987-07-04
ES531729A0 (es) 1985-03-01
BR8305924A (pt) 1985-02-20

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