EP0087553A1 - Procédé de fabrication de pâtes cellulosiques semi-blanchies - Google Patents

Procédé de fabrication de pâtes cellulosiques semi-blanchies Download PDF

Info

Publication number
EP0087553A1
EP0087553A1 EP83100115A EP83100115A EP0087553A1 EP 0087553 A1 EP0087553 A1 EP 0087553A1 EP 83100115 A EP83100115 A EP 83100115A EP 83100115 A EP83100115 A EP 83100115A EP 0087553 A1 EP0087553 A1 EP 0087553A1
Authority
EP
European Patent Office
Prior art keywords
pulp
oxygen
peroxide
bleaching
sodium silicate
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.)
Granted
Application number
EP83100115A
Other languages
German (de)
English (en)
Other versions
EP0087553B1 (fr
Inventor
Horst Dr. Krüger
Hans Ulrich Dr. Süss
Kurt Schmidt
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.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
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=6156909&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0087553(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Degussa GmbH filed Critical Degussa GmbH
Priority to AT83100115T priority Critical patent/ATE21133T1/de
Publication of EP0087553A1 publication Critical patent/EP0087553A1/fr
Application granted granted Critical
Publication of EP0087553B1 publication Critical patent/EP0087553B1/fr
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
    • 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
    • D21C9/1068—Bleaching ; Apparatus therefor with O2
    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Definitions

  • Semi-bleached pulps have whiteness levels that lie between unbleached and highly bleached pulp.
  • Commercial, highly bleached pulps have a white content of 88 to more than 90% Elrepho (R457).
  • Indicating light and semi-bleached pulps relate to the B-rich e between unbleached (when sulphate pulp 20 to 30% E lrepho, for sulphite wood pulp 50 to 60% Elrepho) and about 80 to 88% Elrepho.
  • the invention relates to a process for the production of semi-bleached cellulose, which is characterized in that the delignification and bleaching are carried out with oxygen overpressure in the presence of hydrogen peroxide, alkali and sodium silicate in aqueous suspension.
  • the process according to the invention is particularly suitable for the bleaching of hardwood and softwood sulphite and cellulose sulphate to a white content of 40 to 80% (Elrepho R 457).
  • the process according to the invention enables a significant reduction in the compared to the known peroxide bleaching process Peroxide use with comparable results in terms of whiteness, yield and strength.
  • a pulp is obtained which, in addition to a high lignin content, has a high degree of whiteness, with no reduction in the yield.
  • a particularly simple type of application on an industrial scale is the combination of an oxygen and alkali mixture with a medium consistency with an optionally directly subsequent mixture of hydrogen peroxide and sodium silicate.
  • the oxygen can be added via a refiner. During the short dwell time of the material flow when pumping up to the bleaching tower in a tube, oxygen causes partial delignification and oxidation of the peroxide-consuming, dissolved organic substances. If the pulp is then left to react in one of the usual downward working towers, considerably less peroxide is required to achieve the same white content as without the addition of oxygen. A temporal separation of the oxygen and peroxide addition is also possible. Peroxide can only be added to the oxygen-pretreated pulp directly before the tower entrance.
  • the oxygen mixer can be used to work directly into an upward tower.
  • the working pressure in this application is 2 to 4 bar.
  • the process according to the invention reduces the peroxide requirement by more than 30%. Since the advantages of bleaching with peroxide, high yield, low wastewater pollution and good strength values are retained, the cost-effectiveness of the process is considerably enhanced by the use of inexpensive oxygen.
  • Spruce Magnefite pulp for use in newsprint should be bleached to a white content of 60.
  • the initial whiteness is 50.7, kappa 32 and the strength at 20 SR with 8.1 km tear length and 1210 mNm / m tear strength.
  • Pine sulfate pulp should be bleached to a whiteness of> 50 in one stage.
  • Pine sulfate pulp should be bleached to a whiteness level of around 70 (R 457) in one step. This is not possible using the known bleaching process with only one peroxide stage. Whiteness contents 55 cannot be achieved from the starting whiteness 23.4 and with a kappa number of 37.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
EP83100115A 1982-02-27 1983-01-08 Procédé de fabrication de pâtes cellulosiques semi-blanchies Expired EP0087553B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83100115T ATE21133T1 (de) 1982-02-27 1983-01-08 Verfahren zur herstellung von halbgebleichten zellstoffen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3207157 1982-02-27
DE3207157A DE3207157C1 (de) 1982-02-27 1982-02-27 Verfahren zur Herstellung von halbgebleichten Zellstoffen

Publications (2)

Publication Number Publication Date
EP0087553A1 true EP0087553A1 (fr) 1983-09-07
EP0087553B1 EP0087553B1 (fr) 1986-07-30

Family

ID=6156909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83100115A Expired EP0087553B1 (fr) 1982-02-27 1983-01-08 Procédé de fabrication de pâtes cellulosiques semi-blanchies

Country Status (5)

Country Link
EP (1) EP0087553B1 (fr)
AT (1) ATE21133T1 (fr)
DE (2) DE3207157C1 (fr)
FI (1) FI824295L (fr)
NO (1) NO824357L (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0171575A1 (fr) * 1984-08-01 1986-02-19 Degussa Aktiengesellschaft Procédé de délignification et blanchiment de pâtes cellulosiques
EP0185858A1 (fr) * 1984-12-19 1986-07-02 Degussa Aktiengesellschaft Procédé de délignification de pâtes-sulfates
EP0206560A2 (fr) * 1985-06-17 1986-12-30 Pulp and Paper Research Institute of Canada Traitement alcalin au peroxyde et à l'oxygène pour des pâtes chimiques non-blanchies et chlorées
EP0401149A1 (fr) * 1989-05-19 1990-12-05 Fmc Corporation Délignification à l'oxygène renforcée au peroxide d'hydrogène
EP0436062A1 (fr) * 1990-01-05 1991-07-10 Praxair Technology, Inc. Blanchiment des textiles par de l'oxygène et du peroxyde d'hydrogène
EP0577157A2 (fr) * 1991-06-27 1994-01-05 A. Ahlstrom Corporation Procédé de blanchiment au peroxyde
BE1005800A3 (fr) * 1992-05-22 1994-02-01 Solvay Interox Procede pour la delignification et le blanchiment d'une pate a papier chimique.
WO1994011568A1 (fr) * 1992-11-13 1994-05-26 A. Ahlstrom Corporation Procede de blanchiment de pate de cellulose
WO1994029511A1 (fr) * 1993-06-08 1994-12-22 Kvaerner Pulping Technologies Ab Procede de blanchiment de pate de cellulose
WO1997027358A2 (fr) * 1995-12-07 1997-07-31 Beloit Technologies, Inc. Delignification par de l'oxygene d'une pate a papier de consistance moyenne
EP0759105B1 (fr) * 1994-05-11 1998-12-02 Elf Atochem S.A. Procede de preparation de pates a papier chimiques delignifiees et blanchies

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1378695A (en) * 1993-12-28 1995-07-17 Mauvin Material And Chemical Processing Limited Process for delignifying virgin and post-consumer used ligno-cellulosic plant meterials for the purpose of preparing cellulosic fiber, free sugars and lignin by-products
ZA955190B (en) * 1994-07-11 1996-03-14 Ingersoll Rand Co Method for bleaching wood pulp using hydrogen peroxide
DE19751173A1 (de) * 1997-11-19 1999-05-27 Voith Sulzer Papiertech Patent Verfahren zur Erhöhung des Weißgrades von Papierfaserstoff
RU2744339C1 (ru) * 2020-07-20 2021-03-05 федеральное государственное бюджетное образовательное учреждение высшего образования "Пермский национальный исследовательский политехнический университет" Способ отбелки сульфитной целлюлозы

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2040763A1 (de) * 1970-05-11 1971-11-18 Kymin Oy Kymmene Ab Verfahren zum Bleichen zellulosehaltiger Stoffe
US3694309A (en) * 1968-11-22 1972-09-26 Svenska Traeforskningsinst Lignin-preserving bleaching of cellulose pulp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3832276A (en) * 1973-03-07 1974-08-27 Int Paper Co Delignification and bleaching of a cellulose pulp slurry with oxygen
JPS5138508A (en) * 1974-09-25 1976-03-31 Harusuke Hayashi Parupuno sansosankaseisei niokeru hogozai
US3951733A (en) * 1974-11-06 1976-04-20 International Paper Company Delignification and bleaching of wood pulp with oxygen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3694309A (en) * 1968-11-22 1972-09-26 Svenska Traeforskningsinst Lignin-preserving bleaching of cellulose pulp
DE2040763A1 (de) * 1970-05-11 1971-11-18 Kymin Oy Kymmene Ab Verfahren zum Bleichen zellulosehaltiger Stoffe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ABSTRACT BULLETIN OF THE INSTITUTE OF PAPER CHEMISTRY, Band 48, Nr. 8, Februar 1978, Seite 895, Zusammenfassung Nr. 8317, Appleton, Wi., USA *

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0171575A1 (fr) * 1984-08-01 1986-02-19 Degussa Aktiengesellschaft Procédé de délignification et blanchiment de pâtes cellulosiques
EP0185858A1 (fr) * 1984-12-19 1986-07-02 Degussa Aktiengesellschaft Procédé de délignification de pâtes-sulfates
EP0206560A2 (fr) * 1985-06-17 1986-12-30 Pulp and Paper Research Institute of Canada Traitement alcalin au peroxyde et à l'oxygène pour des pâtes chimiques non-blanchies et chlorées
EP0206560A3 (fr) * 1985-06-17 1988-07-20 Pulp and Paper Research Institute of Canada Traitement alcalin au peroxyde et à l'oxygène pour des pâtes chimiques non-blanchies et chlorées
EP0401149A1 (fr) * 1989-05-19 1990-12-05 Fmc Corporation Délignification à l'oxygène renforcée au peroxide d'hydrogène
EP0436062A1 (fr) * 1990-01-05 1991-07-10 Praxair Technology, Inc. Blanchiment des textiles par de l'oxygène et du peroxyde d'hydrogène
EP0577157A3 (fr) * 1991-06-27 1995-04-12 Ahlstroem Oy Procédé de blanchiment au peroxyde.
EP0577157A2 (fr) * 1991-06-27 1994-01-05 A. Ahlstrom Corporation Procédé de blanchiment au peroxyde
BE1005800A3 (fr) * 1992-05-22 1994-02-01 Solvay Interox Procede pour la delignification et le blanchiment d'une pate a papier chimique.
WO1994011568A1 (fr) * 1992-11-13 1994-05-26 A. Ahlstrom Corporation Procede de blanchiment de pate de cellulose
WO1994029515A1 (fr) * 1993-06-08 1994-12-22 Kvaerner Pulping Technologies Ab Procede associe au blanchiment de la pate a papier
WO1994029511A1 (fr) * 1993-06-08 1994-12-22 Kvaerner Pulping Technologies Ab Procede de blanchiment de pate de cellulose
US5571377A (en) * 1993-06-08 1996-11-05 Kvaerner Pulping Technologies Ab Process for peroxide bleaching of chemical pulp in a pressurized bleach vessel
AU677373B2 (en) * 1993-06-08 1997-04-24 Kvaerner Pulping Technologies Ab Process in association with pulp bleaching
CN1044504C (zh) * 1993-06-08 1999-08-04 卡瓦纳碎浆处理公司 纸浆漂白的方法
EP0759105B1 (fr) * 1994-05-11 1998-12-02 Elf Atochem S.A. Procede de preparation de pates a papier chimiques delignifiees et blanchies
WO1997027358A2 (fr) * 1995-12-07 1997-07-31 Beloit Technologies, Inc. Delignification par de l'oxygene d'une pate a papier de consistance moyenne
WO1997027358A3 (fr) * 1995-12-07 1997-10-02 Beloit Technologies Inc Delignification par de l'oxygene d'une pate a papier de consistance moyenne

Also Published As

Publication number Publication date
DE3364788D1 (en) 1986-09-04
EP0087553B1 (fr) 1986-07-30
DE3207157C1 (de) 1983-06-09
FI824295L (fi) 1983-08-28
NO824357L (no) 1983-08-29
FI824295A0 (fi) 1982-12-14
ATE21133T1 (de) 1986-08-15

Similar Documents

Publication Publication Date Title
DE69839097T2 (de) Bleichen von zellstoff mittels persäure
DE69204739T2 (de) Entfernung von Farbe während der Sauerstoffentfärbung von Altpapierfasern.
DE3017712C2 (de) Verfahren zur alkalischen Extraktion von Fasermaterial enthaltenden Cellulosesuspensionen nach Behandlung mit Chlor oder Chlordioxid oder Mischungen davon
DE69028797T2 (de) Verfahren zum Bleichen von Zellstoff mit Ozon
EP0087553B1 (fr) Procédé de fabrication de pâtes cellulosiques semi-blanchies
DE2219504C2 (de) Mehrstufenbleiche von Zellstoffen mit erheblich reduziertem Chloreinsatz
DE69730233T2 (de) Verfahren zur zellstoffherstellung durch einstufiges kochen mit ameisensaüre und wäsche mit perameisensaüre
DE1546276A1 (de) Verfahren zum Bleichen von zellulosehaltigem Material
DE68924793T2 (de) Verfahren zum Bleichen von mechanischem Holzstoff.
EP0171575A1 (fr) Procédé de délignification et blanchiment de pâtes cellulosiques
DE69503147T2 (de) Verfahren zur delignifizierung und zum bleichen von chemischen zellstoff
DE69408065T2 (de) Bleichen von wiederverwendetem zellstoff mittels ozone und wasserstoffperoxyd
DE3309956C1 (de) Verfahren zum Bleichen von Papierrohstoffen
CH641515A5 (en) Multi-stage process for complete bleaching of pulp
DE69026105T2 (de) Hochleistendes verfahren zum bleichen von zellstoff mit chlordioxyd
DE3802401A1 (de) Verfahren zur herstellung von halbgebleichtem kraftzellstoff
DE2124324C3 (de) Verfahren zum Bleichen von Holzzellstoffen
DE2407542A1 (de) Verfahren zum bleichen von pulpe
DE69304723T2 (de) Verfahren zur Delignifizierung von Zellstoffpulpe
DE69204457T2 (de) Verfahren zum bleichen und zur delignifizierung von chemischen papierzellstoffen.
DE2124325C3 (de) Verfahren zum Bleichen von chemischen Holzzellstoff
DE69805056T2 (de) Delignifizierung von zellstoff mit sauerstoff
EP0185858B1 (fr) Procédé de délignification de pâtes-sulfates
DE69102430T2 (de) Bleichen von chemischem zellstoff.
DE3590512T1 (de) Verfahren zur Herstellung von Cellulosepulpe

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19830108

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 21133

Country of ref document: AT

Date of ref document: 19860815

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

REF Corresponds to:

Ref document number: 3364788

Country of ref document: DE

Date of ref document: 19860904

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19870108

Ref country code: AT

Effective date: 19870108

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19870109

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19870131

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: PEROXID-CHEMIE GMBH

Effective date: 19870429

NLR1 Nl: opposition has been filed with the epo

Opponent name: PEROXID - CHEMIE GMBH

BERE Be: lapsed

Owner name: DEGUSSA A.G.

Effective date: 19870131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19870801

GBPC Gb: european patent ceased through non-payment of renewal fee
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19871001

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 19880229

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state
REG Reference to a national code

Ref country code: GB

Ref legal event code: 7102

EUG Se: european patent has lapsed

Ref document number: 83100115.1

Effective date: 19870923