ZA91958B - Process for preparing kraft pulp - Google Patents

Process for preparing kraft pulp

Info

Publication number
ZA91958B
ZA91958B ZA91958A ZA91958A ZA91958B ZA 91958 B ZA91958 B ZA 91958B ZA 91958 A ZA91958 A ZA 91958A ZA 91958 A ZA91958 A ZA 91958A ZA 91958 B ZA91958 B ZA 91958B
Authority
ZA
South Africa
Prior art keywords
kraft pulp
preparing kraft
followed
temperature
preparing
Prior art date
Application number
ZA91958A
Inventor
Panu Tikka
Tikka Panu
Original Assignee
Sunds Defibrator Rauma Oy
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=ZA91958(B) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sunds Defibrator Rauma Oy filed Critical Sunds Defibrator Rauma Oy
Publication of ZA91958B publication Critical patent/ZA91958B/en

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

  • Inorganic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Paper (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Holo Graphy (AREA)
  • Nonmetallic Welding Materials (AREA)
  • Inorganic Insulating Materials (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Noodles (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 DEG C, followed by heating the impregnated chips at the temperature of from about 120 to 180 DEG C, followed by digestion of the lignin with white liquor, which is facilitated by using this pretreatment process.
ZA91958A 1990-02-09 1991-02-08 Process for preparing kraft pulp ZA91958B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI900663A FI93866B (en) 1990-02-09 1990-02-09 Method for preparing sulphate pulp

Publications (1)

Publication Number Publication Date
ZA91958B true ZA91958B (en) 1991-11-27

Family

ID=8529860

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA91958A ZA91958B (en) 1990-02-09 1991-02-08 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)

Families Citing this family (9)

* 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
NZ247276A (en) * 1992-04-06 1994-12-22 Westvaco Corp Production of papermaking fibre of low lignin content from recycled high lignin waste paper; mixtures with fresh pulp and products produced therefrom
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 high alpha dissolving pulp production
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

Also Published As

Publication number Publication date
JP2900091B2 (en) 1999-06-02
FI900663A0 (en) 1990-02-09
ATE141351T1 (en) 1996-08-15
NO913873L (en) 1991-10-02
NO178935C (en) 2000-06-26
FI93866B (en) 1995-02-28
NO913873D0 (en) 1991-10-02
JPH04505485A (en) 1992-09-24
AU7218991A (en) 1991-09-03
CA2049322A1 (en) 1991-08-10
PT96713B (en) 2001-05-31
NO178935B (en) 1996-03-25
PT96713A (en) 1991-10-31
ES2091319T3 (en) 1996-11-01
BR9104333A (en) 1992-04-21
DE69121332D1 (en) 1996-09-19
CA2049322C (en) 2002-08-20
NZ236941A (en) 1993-10-26
FI900663A (en) 1991-08-10
DE69121332T2 (en) 1997-03-13
EP0468016B1 (en) 1996-08-14
AU639304B2 (en) 1993-07-22
WO1991012368A1 (en) 1991-08-22
EP0468016A1 (en) 1992-01-29

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