FI900663A0 - Process for the preparation of sulphate pulp - Google Patents

Process for the preparation of sulphate pulp

Info

Publication number
FI900663A0
FI900663A0 FI900663A FI900663A FI900663A0 FI 900663 A0 FI900663 A0 FI 900663A0 FI 900663 A FI900663 A FI 900663A FI 900663 A FI900663 A FI 900663A FI 900663 A0 FI900663 A0 FI 900663A0
Authority
FI
Finland
Prior art keywords
preparation
sulphate pulp
followed
temperature
chips
Prior art date
Application number
FI900663A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI93866B (en
FI900663A (en
Inventor
Panu Olavi Tikka
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=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FI900663(A0) "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
Priority to FI900663A priority Critical patent/FI93866B/en
Publication of FI900663A0 publication Critical patent/FI900663A0/en
Priority to NZ236941A priority patent/NZ236941A/en
Priority to ZA91958A priority patent/ZA91958B/en
Priority to PT96713A priority patent/PT96713B/en
Priority to DE69121332T priority patent/DE69121332T2/en
Priority to AT91903366T priority patent/ATE141351T1/en
Priority to CA002049322A priority patent/CA2049322C/en
Priority to BR919104333A priority patent/BR9104333A/en
Priority to EP91903366A priority patent/EP0468016B1/en
Priority to JP3503756A priority patent/JP2900091B2/en
Priority to ES91903366T priority patent/ES2091319T3/en
Priority to AU72189/91A priority patent/AU639304B2/en
Priority to PCT/FI1991/000043 priority patent/WO1991012368A1/en
Publication of FI900663A publication Critical patent/FI900663A/en
Priority to NO913873A priority patent/NO178935C/en
Priority to US07794795 priority patent/US5183535B1/en
Publication of FI93866B publication Critical patent/FI93866B/en
Application granted granted Critical

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)

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.
FI900663A 1990-02-09 1990-02-09 Method for preparing sulphate pulp FI93866B (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
FI900663A FI93866B (en) 1990-02-09 1990-02-09 Method for preparing sulphate pulp
NZ236941A NZ236941A (en) 1990-02-09 1991-01-30 Preparation of kraft pulp: impregnation with spent alkaline cooking liquor, heating, and subsequent delignification with fresh alkaline cooking liquor
ZA91958A ZA91958B (en) 1990-02-09 1991-02-08 Process for preparing kraft pulp
PT96713A PT96713B (en) 1990-02-09 1991-02-08 KRAFT PASTE PREPARATION PROCESS
PCT/FI1991/000043 WO1991012368A1 (en) 1990-02-09 1991-02-11 Process for preparing kraft pulp
BR919104333A BR9104333A (en) 1990-02-09 1991-02-11 PROCESS FOR THE PREPARATION OF KRAFT PULP
AU72189/91A AU639304B2 (en) 1990-02-09 1991-02-11 Process for preparing kraft pulp
CA002049322A CA2049322C (en) 1990-02-09 1991-02-11 Process for preparing kraft pulp
DE69121332T DE69121332T2 (en) 1990-02-09 1991-02-11 METHOD FOR PRODUCING POWERS
EP91903366A EP0468016B1 (en) 1990-02-09 1991-02-11 Process for preparing kraft pulp
JP3503756A JP2900091B2 (en) 1990-02-09 1991-02-11 Kraft pulp manufacturing method
ES91903366T ES2091319T3 (en) 1990-02-09 1991-02-11 PROCESS TO PREPARE KRAFT PASTA.
AT91903366T ATE141351T1 (en) 1990-02-09 1991-02-11 METHOD FOR PRODUCING POWER PULP
NO913873A NO178935C (en) 1990-02-09 1991-10-02 Process for the production of cogeneration
US07794795 US5183535B1 (en) 1990-02-09 1991-11-19 Process for preparing kraft pulp using black liquor pretreatment reaction

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 (3)

Publication Number Publication Date
FI900663A0 true FI900663A0 (en) 1990-02-09
FI900663A FI900663A (en) 1991-08-10
FI93866B FI93866B (en) 1995-02-28

Family

ID=8529860

Family Applications (1)

Application Number Title Priority Date Filing Date
FI900663A FI93866B (en) 1990-02-09 1990-02-09 Method for preparing sulphate 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 1995-09-22 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
FI20002586A (en) * 2000-11-24 2002-05-25 Metso Paper Inc Process for alkaline batching when cooking fiber material
FI20002587A (en) * 2000-11-24 2002-05-25 Metso Paper Inc Alkaline cooking method for fibrous 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
DE69121332T2 (en) 1997-03-13
ES2091319T3 (en) 1996-11-01
CA2049322C (en) 2002-08-20
EP0468016A1 (en) 1992-01-29
BR9104333A (en) 1992-04-21
WO1991012368A1 (en) 1991-08-22
FI93866B (en) 1995-02-28
CA2049322A1 (en) 1991-08-10
NZ236941A (en) 1993-10-26
JPH04505485A (en) 1992-09-24
FI900663A (en) 1991-08-10
NO913873D0 (en) 1991-10-02
NO178935B (en) 1996-03-25
PT96713A (en) 1991-10-31
PT96713B (en) 2001-05-31
JP2900091B2 (en) 1999-06-02
EP0468016B1 (en) 1996-08-14
DE69121332D1 (en) 1996-09-19
NO178935C (en) 2000-06-26
AU639304B2 (en) 1993-07-22
ATE141351T1 (en) 1996-08-15
ZA91958B (en) 1991-11-27
AU7218991A (en) 1991-09-03
NO913873L (en) 1991-10-02

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Legal Events

Date Code Title Description
BB Publication of examined application
MFD Revocation of patent following opposition

Owner name: METSO CHEMICAL PULPING OY