EP0307295B1 - Procédé de fabrication de pâte à papier blanchie comportant un traitement à l'aide d'acide carbonique après blanchiment - Google Patents

Procédé de fabrication de pâte à papier blanchie comportant un traitement à l'aide d'acide carbonique après blanchiment Download PDF

Info

Publication number
EP0307295B1
EP0307295B1 EP88402223A EP88402223A EP0307295B1 EP 0307295 B1 EP0307295 B1 EP 0307295B1 EP 88402223 A EP88402223 A EP 88402223A EP 88402223 A EP88402223 A EP 88402223A EP 0307295 B1 EP0307295 B1 EP 0307295B1
Authority
EP
European Patent Office
Prior art keywords
bleaching
pulp
whiteness
treatment
iso
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
EP88402223A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0307295A1 (fr
Inventor
Raymond Lachapelle
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.)
Air Liquide Canada Inc
Original Assignee
Air Liquide Canada Inc
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 Air Liquide Canada Inc filed Critical Air Liquide Canada Inc
Priority to AT88402223T priority Critical patent/ATE62287T1/de
Publication of EP0307295A1 publication Critical patent/EP0307295A1/fr
Application granted granted Critical
Publication of EP0307295B1 publication Critical patent/EP0307295B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the present invention relates to a process for the manufacture of paper pulp, the bleaching of which includes an H or P treatment phase before the pulp is purified or passed through the paper machine.
  • the bleaching sequences comprise one or more successive stages and generally separated by washes.
  • the stages are characterized by the bleaching agent used. Mention may be made, by way of reference and without limitation of examples of sequences: in the case of chemical pulps, and Kraft in particular, CEHH, CEP, CEDED, CEDP, CEHDP and, CEDED (P), and CEDHD (P ); in the case of sulfite pastes, CEH, HH, H and OH; in the case of mechanical pulps, RP, PP, RPRP, PRP or P; in the case of semi-chemical pastes, RP, HH, OH.
  • the present invention relates to a method of manufacturing paper pulp of the type in which the bleaching comprises an H or P phase before the bleached pulp passes through the purifier and / or the paper machine, characterized in that one treats the bleached pulp essentially with carbonic acid and directly after the bleaching treatment.
  • the method according to the invention can be implemented whether the pulp is mechanical, chemical or comes from recycling of inked paper, and whatever the bleaching sequence, with multiple or single stage, provided that the last or single stage is type H or P.
  • thermomechanical TMP
  • CTMP chemico-thermomechanical
  • the dough is usually washed and treated in the form of a suspension.
  • the carbonic acid is introduced into the washing waters of the last or only bleaching step. It can also be introduced into the suspension after it has left the last or only bleaching step.
  • the carbonic acid can be introduced in gaseous, liquid form, or in solution, for example in the washing or dilution water of the suspension, or in the suspension.
  • the pulp is treated in the usual way, that is to say it can be stored or directly introduced into the paper machine, or be purified, for example.
  • the final pH is 8.3 and the residual peroxide 1.3% compared to the dry paste.
  • the concentration of the paste is 10%, the temperature 85 ° C and the retention time 30 minutes.
  • the final pH is 8.1 and the residual peroxide is equivalent to 0.61% H2O2 compared to the dry paste.
  • the residual peroxide can be extracted from the suspension and recovered for subsequent bleaching.
  • the whiteness after precisely the pH by CO 2 is greater than the whiteness after adjusting the pH by SO2.
  • a softwood-based chemical kraft pulp is bleached in a C D E O DP sequence.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Materials For Medical Uses (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
EP88402223A 1987-09-08 1988-09-05 Procédé de fabrication de pâte à papier blanchie comportant un traitement à l'aide d'acide carbonique après blanchiment Expired - Lifetime EP0307295B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88402223T ATE62287T1 (de) 1987-09-08 1988-09-05 Verfahren zur herstellung einer gebleichten papierpulpe mittels einer kohlensaeurebehandlung nach der bleiche.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8712451A FR2620144B1 (fr) 1987-09-08 1987-09-08 Procede de fabrication de pate a papier blanchie comportant un traitement a l'aide d'acide carbonique apres blanchiment
FR8712451 1987-09-08

Publications (2)

Publication Number Publication Date
EP0307295A1 EP0307295A1 (fr) 1989-03-15
EP0307295B1 true EP0307295B1 (fr) 1991-04-03

Family

ID=9354710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88402223A Expired - Lifetime EP0307295B1 (fr) 1987-09-08 1988-09-05 Procédé de fabrication de pâte à papier blanchie comportant un traitement à l'aide d'acide carbonique après blanchiment

Country Status (18)

Country Link
EP (1) EP0307295B1 (sv)
JP (1) JPH01207492A (sv)
KR (1) KR890005346A (sv)
CN (1) CN1013131B (sv)
AT (1) ATE62287T1 (sv)
AU (1) AU608054B2 (sv)
BR (1) BR8804619A (sv)
DE (1) DE3862265D1 (sv)
ES (1) ES2021857B3 (sv)
FI (1) FI884123A (sv)
FR (1) FR2620144B1 (sv)
GR (1) GR3001730T3 (sv)
MA (1) MA21393A1 (sv)
NO (1) NO883968L (sv)
NZ (1) NZ226060A (sv)
OA (1) OA08949A (sv)
PT (1) PT88435B (sv)
ZA (1) ZA886622B (sv)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9206415D0 (en) * 1992-03-24 1992-05-06 Albright & Wilson Stabilisation of bleach liquors
US5639347A (en) * 1993-03-24 1997-06-17 Ahlstrom Machinery Inc. Method of controlling of metals in a bleach plant, using oxidation
US5509999A (en) * 1993-03-24 1996-04-23 Kamyr, Inc. Treatment of bleach plant effluents
FI110533B (sv) * 2000-05-04 2003-02-14 Aga Ab Förfarande för att förhindra förökning av mikrober
WO2011113119A1 (en) * 2010-03-19 2011-09-22 Fibria Celulose S/A Process for the treatment of cellulose pulps, cellulose pulp thus obtained and use of biopolymer for treating cellulose pulps
CN104032611B (zh) * 2014-06-23 2016-04-20 广西大学 一种纸浆漂白方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1993265A (en) * 1933-02-28 1935-03-05 Merrimac Chemical Co Inc Manufacture of paper embodying alkaline earth metal carbonate fillers
FI52876C (fi) * 1974-09-03 1978-10-17 Ahlstroem Oy Foerfarande foer tvaettning av en cellulosamassa fraon alkalikok

Also Published As

Publication number Publication date
DE3862265D1 (de) 1991-05-08
GR3001730T3 (en) 1992-11-23
NO883968D0 (no) 1988-09-07
FR2620144A1 (fr) 1989-03-10
PT88435B (pt) 1992-10-30
KR890005346A (ko) 1989-05-13
CN1013131B (zh) 1991-07-10
OA08949A (fr) 1990-11-30
EP0307295A1 (fr) 1989-03-15
BR8804619A (pt) 1989-04-18
ATE62287T1 (de) 1991-04-15
FI884123A (fi) 1989-03-09
CN1033664A (zh) 1989-07-05
JPH0217678B2 (sv) 1990-04-23
NZ226060A (en) 1991-02-26
AU2196088A (en) 1989-03-09
FR2620144B1 (fr) 1989-12-08
NO883968L (no) 1989-03-09
ES2021857B3 (es) 1991-11-16
AU608054B2 (en) 1991-03-21
MA21393A1 (fr) 1989-07-01
FI884123A0 (fi) 1988-09-07
ZA886622B (en) 1991-05-29
JPH01207492A (ja) 1989-08-21
PT88435A (pt) 1989-07-31

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