DE69125722D1 - DIGESTIVE PROCEDURE - Google Patents

DIGESTIVE PROCEDURE

Info

Publication number
DE69125722D1
DE69125722D1 DE69125722T DE69125722T DE69125722D1 DE 69125722 D1 DE69125722 D1 DE 69125722D1 DE 69125722 T DE69125722 T DE 69125722T DE 69125722 T DE69125722 T DE 69125722T DE 69125722 D1 DE69125722 D1 DE 69125722D1
Authority
DE
Germany
Prior art keywords
digester
digestive
bleaching
procedure
pulp
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 - Fee Related
Application number
DE69125722T
Other languages
German (de)
Other versions
DE69125722T2 (en
Inventor
Ethan K Andrews
Fernando E Mera
Lawrence K Swift
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.)
Beloit Technologies Inc
Original Assignee
Beloit Technologies 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 Beloit Technologies Inc filed Critical Beloit Technologies Inc
Application granted granted Critical
Publication of DE69125722D1 publication Critical patent/DE69125722D1/en
Publication of DE69125722T2 publication Critical patent/DE69125722T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/26—Multistage processes
    • 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
    • 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
    • D21C9/1031—Pulse, dynamic, displacement processes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Drying Of Semiconductors (AREA)
  • Materials For Photolithography (AREA)
  • Prostheses (AREA)
  • Radiation-Therapy Devices (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

A pulp preparation process in which pulp treatment is expanded to include in-digester treatments (Figures 7, 8, 9) previously performed outside of the digester (12) in discrete process equipment. Specifically, a manner for in-digester bleaching is disclosed, preferably using non-chlorine containing bleaching reagents.
DE69125722T 1990-10-24 1991-10-07 DIGESTIVE PROCEDURE Expired - Fee Related DE69125722T2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US60260590A 1990-10-24 1990-10-24
PCT/US1991/007402 WO1992007994A1 (en) 1990-10-24 1991-10-07 Pulping process

Publications (2)

Publication Number Publication Date
DE69125722D1 true DE69125722D1 (en) 1997-05-22
DE69125722T2 DE69125722T2 (en) 1997-09-04

Family

ID=24412030

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69125722T Expired - Fee Related DE69125722T2 (en) 1990-10-24 1991-10-07 DIGESTIVE PROCEDURE

Country Status (14)

Country Link
EP (1) EP0554391B1 (en)
CN (1) CN1028250C (en)
AT (1) ATE151824T1 (en)
AU (1) AU9022291A (en)
CA (1) CA2094819C (en)
DE (1) DE69125722T2 (en)
ES (1) ES2101830T3 (en)
FI (1) FI931854A (en)
MX (1) MX9101706A (en)
NO (1) NO302187B1 (en)
PL (1) PL168216B1 (en)
RU (1) RU2068904C1 (en)
WO (1) WO1992007994A1 (en)
ZA (1) ZA918441B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936338A (en) * 1982-08-24 1984-02-28 Matsushita Electric Ind Co Ltd Optical disk recording and reproducing method
USH1690H (en) * 1995-07-20 1997-11-04 Nye; Jeffrey Process for bleaching kraft pulp
FR2885371B1 (en) * 2005-05-03 2007-08-03 Cie Ind De La Matiere Vegetale INSTALLATION FOR IMPLEMENTING A PROCESS FOR PRODUCING PAPER PULP, LIGNINS AND SUGARS AND PROCESS FOR PRODUCING THE SAME
US9932709B2 (en) 2013-03-15 2018-04-03 Ecolab Usa Inc. Processes and compositions for brightness improvement in paper production
CN103498375B (en) * 2013-09-24 2015-06-03 昆明理工大学 Method for pulping by broussonetia papyrifera white-bark
BR102014027199B1 (en) * 2014-07-14 2022-10-04 Nalco Company METHOD TO IMPROVE THE MANUFACTURING OF SODA OR KRAFT PULP

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE353105C (en) * 1921-07-16 1922-05-18 Leopold Enge Process for the production of wood pulp
SE373397C (en) * 1972-03-30 1984-01-26 Mo Och Domsjoe Ab WAY TO IMPROVE THE WHEATING WHITING WHEN BLINDING CELLULOSAMASSA WITH AN ACID CONTAINING GAS
US4578149A (en) * 1981-03-05 1986-03-25 Fagerlund Bertil K E Process for digesting cellulosic material with heat recovery

Also Published As

Publication number Publication date
MX9101706A (en) 1992-06-05
ZA918441B (en) 1992-07-29
CN1061452A (en) 1992-05-27
FI931854A0 (en) 1993-04-23
ES2101830T3 (en) 1997-07-16
DE69125722T2 (en) 1997-09-04
FI931854A (en) 1993-04-23
PL168216B1 (en) 1996-01-31
NO931486L (en) 1993-04-22
NO931486D0 (en) 1993-04-22
EP0554391A1 (en) 1993-08-11
CN1028250C (en) 1995-04-19
ATE151824T1 (en) 1997-05-15
CA2094819A1 (en) 1992-04-25
RU2068904C1 (en) 1996-11-10
CA2094819C (en) 1999-02-02
EP0554391B1 (en) 1997-04-16
AU9022291A (en) 1992-05-26
WO1992007994A1 (en) 1992-05-14
NO302187B1 (en) 1998-02-02

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee