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CA2049322A1 - Process for preparing kraft pulp - Google Patents

Process for preparing kraft pulp

Info

Publication number
CA2049322A1
CA2049322A1 CA002049322A CA2049322A CA2049322A1 CA 2049322 A1 CA2049322 A1 CA 2049322A1 CA 002049322 A CA002049322 A CA 002049322A CA 2049322 A CA2049322 A CA 2049322A CA 2049322 A1 CA2049322 A1 CA 2049322A1
Authority
CA
Canada
Prior art keywords
kraft pulp
preparing kraft
followed
temperature
preparing
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
CA002049322A
Other languages
French (fr)
Other versions
CA2049322C (en
Inventor
Panu Tikka
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.)
GL&V Management Hungary Kft
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8529860&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2049322(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of CA2049322A1 publication Critical patent/CA2049322A1/en
Application granted granted Critical
Publication of CA2049322C publication Critical patent/CA2049322C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate 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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
    • 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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Inorganic Insulating Materials (AREA)
  • Noodles (AREA)
  • Nonmetallic Welding Materials (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Holo Graphy (AREA)

Abstract

Processes for preparing kraft pulp are disclosed. The processes include pretreating cellulosic material or chips with spent cooking liquor at the temperature of about 20 to 100°C, followed by heating the impregnated chips at the temperature of from about 120 to 180°C, followed by digestion of the lignin with white liquor, which is facilitated by using this pretreatment process.
CA002049322A 1990-02-09 1991-02-11 Process for preparing kraft pulp Expired - Lifetime CA2049322C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI900663A FI93866B (en) 1990-02-09 1990-02-09 Method for preparing sulphate pulp
FI900663 1990-02-09
PCT/FI1991/000043 WO1991012368A1 (en) 1990-02-09 1991-02-11 Process for preparing kraft pulp

Publications (2)

Publication Number Publication Date
CA2049322A1 true CA2049322A1 (en) 1991-08-10
CA2049322C CA2049322C (en) 2002-08-20

Family

ID=8529860

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002049322A Expired - Lifetime CA2049322C (en) 1990-02-09 1991-02-11 Process for preparing kraft pulp

Country Status (14)

Country Link
EP (1) EP0468016B1 (en)
JP (1) JP2900091B2 (en)
AT (1) ATE141351T1 (en)
AU (1) AU639304B2 (en)
BR (1) BR9104333A (en)
CA (1) CA2049322C (en)
DE (1) DE69121332T2 (en)
ES (1) ES2091319T3 (en)
FI (1) FI93866B (en)
NO (1) NO178935C (en)
NZ (1) NZ236941A (en)
PT (1) PT96713B (en)
WO (1) WO1991012368A1 (en)
ZA (1) ZA91958B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5538594A (en) * 1992-04-06 1996-07-23 Westvaco Corporation Method for producing a blade coated paper from recycled, high lignin content, waste paper

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE469842C (en) * 1992-01-21 1996-01-15 Sunds Defibrator Ind Ab Bleaching of chemical pulp with peroxide
FI970254A (en) 1997-01-22 1998-07-23 Ahlstrom Machinery Oy Method and apparatus for cooking pulp
FI20002587A (en) * 2000-11-24 2002-05-25 Metso Paper Inc Alkaline cooking method for fibrous material
FI20002586A (en) * 2000-11-24 2002-05-25 Metso Paper Inc Process for alkaline batching when cooking fiber material
KR20110123184A (en) 2010-05-06 2011-11-14 바히아 스페셜티 셀룰로스 에스에이 Method and system for producing high alpha dissolving pulp
AR091998A1 (en) 2012-05-03 2015-03-18 Annikki Gmbh CELLULOSE PREPARATION PROCEDURE WITH LIGNIN LOW CONCENTRATION
KR102143773B1 (en) * 2018-10-25 2020-08-12 한국세라믹기술원 Manufacturing method of porous active carbon using lignocellulose biomass and manufacturing method of the supercapacitor usig the active carbon
KR102157512B1 (en) * 2018-11-16 2020-09-18 한국세라믹기술원 Manufacturing method of spherical porous active carbon using lignocellulose biomass and manufacturing method of the supercapacitor usig the porous active carbon

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE101369C1 (en) *
US1687076A (en) * 1927-10-12 1928-10-09 Venning D Simons Process for cooking wood chips by the alkaline process of pulp manufacture
US2639987A (en) * 1947-07-09 1953-05-26 Ass Pulp & Paper Mills Two-stage pulping process
US4578149A (en) * 1981-03-05 1986-03-25 Fagerlund Bertil K E Process for digesting cellulosic material with heat recovery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5538594A (en) * 1992-04-06 1996-07-23 Westvaco Corporation Method for producing a blade coated paper from recycled, high lignin content, waste paper

Also Published As

Publication number Publication date
ZA91958B (en) 1991-11-27
JP2900091B2 (en) 1999-06-02
WO1991012368A1 (en) 1991-08-22
EP0468016B1 (en) 1996-08-14
NO913873L (en) 1991-10-02
NZ236941A (en) 1993-10-26
NO913873D0 (en) 1991-10-02
FI93866B (en) 1995-02-28
BR9104333A (en) 1992-04-21
PT96713B (en) 2001-05-31
AU639304B2 (en) 1993-07-22
FI900663A (en) 1991-08-10
EP0468016A1 (en) 1992-01-29
ATE141351T1 (en) 1996-08-15
AU7218991A (en) 1991-09-03
JPH04505485A (en) 1992-09-24
DE69121332T2 (en) 1997-03-13
DE69121332D1 (en) 1996-09-19
NO178935C (en) 2000-06-26
NO178935B (en) 1996-03-25
PT96713A (en) 1991-10-31
ES2091319T3 (en) 1996-11-01
FI900663A0 (en) 1990-02-09
CA2049322C (en) 2002-08-20

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry