CA2094819A1 - Pulping process - Google Patents

Pulping process

Info

Publication number
CA2094819A1
CA2094819A1 CA 2094819 CA2094819A CA2094819A1 CA 2094819 A1 CA2094819 A1 CA 2094819A1 CA 2094819 CA2094819 CA 2094819 CA 2094819 A CA2094819 A CA 2094819A CA 2094819 A1 CA2094819 A1 CA 2094819A1
Authority
CA
Canada
Prior art keywords
digester
pulping process
bleaching
pulp
treatments
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
CA 2094819
Other languages
French (fr)
Other versions
CA2094819C (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
Individual
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 Individual filed Critical Individual
Publication of CA2094819A1 publication Critical patent/CA2094819A1/en
Application granted granted Critical
Publication of CA2094819C publication Critical patent/CA2094819C/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)
  • Prostheses (AREA)
  • Radiation-Therapy Devices (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Drying Of Semiconductors (AREA)
  • Materials For Photolithography (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.
CA002094819A 1990-10-24 1991-10-07 Pulping process Expired - Fee Related CA2094819C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US60260590A 1990-10-24 1990-10-24
US602,605 1990-10-24

Publications (2)

Publication Number Publication Date
CA2094819A1 true CA2094819A1 (en) 1992-04-25
CA2094819C CA2094819C (en) 1999-02-02

Family

ID=24412030

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002094819A Expired - Fee Related CA2094819C (en) 1990-10-24 1991-10-07 Pulping process

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 1984-02-06 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
DE69125722T2 (en) 1997-09-04
AU9022291A (en) 1992-05-26
EP0554391A1 (en) 1993-08-11
MX9101706A (en) 1992-06-05
CA2094819C (en) 1999-02-02
ZA918441B (en) 1992-07-29
ES2101830T3 (en) 1997-07-16
NO302187B1 (en) 1998-02-02
RU2068904C1 (en) 1996-11-10
DE69125722D1 (en) 1997-05-22
CN1061452A (en) 1992-05-27
WO1992007994A1 (en) 1992-05-14
FI931854A0 (en) 1993-04-23
FI931854A (en) 1993-04-23
EP0554391B1 (en) 1997-04-16
ATE151824T1 (en) 1997-05-15
PL168216B1 (en) 1996-01-31
NO931486L (en) 1993-04-22
NO931486D0 (en) 1993-04-22
CN1028250C (en) 1995-04-19

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed