FI45574C - Process for bleaching cellulosic materials. - Google Patents

Process for bleaching cellulosic materials.

Info

Publication number
FI45574C
FI45574C FI701311A FI131170A FI45574C FI 45574 C FI45574 C FI 45574C FI 701311 A FI701311 A FI 701311A FI 131170 A FI131170 A FI 131170A FI 45574 C FI45574 C FI 45574C
Authority
FI
Finland
Prior art keywords
cellulosic materials
bleaching cellulosic
bleaching
materials
cellulosic
Prior art date
Application number
FI701311A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI45574B (en
Inventor
Koivisto Pekka
Lasenius Ingmar
Paasonen Pauli
Original Assignee
Kymin Oy Kymmene Ab
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 Kymin Oy Kymmene Ab filed Critical Kymin Oy Kymmene Ab
Priority to FI701311A priority Critical patent/FI45574C/en
Priority to DE2040763A priority patent/DE2040763C3/en
Priority to ZA712989A priority patent/ZA712989B/en
Priority to NO1752/71A priority patent/NO127205B/no
Priority to CA112,573A priority patent/CA946107A/en
Priority to SE7106108A priority patent/SE373396B/en
Priority to BR2828/71A priority patent/BR7102828D0/en
Application granted granted Critical
Publication of FI45574B publication Critical patent/FI45574B/fi
Publication of FI45574C publication Critical patent/FI45574C/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
    • 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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
FI701311A 1970-05-11 1970-05-11 Process for bleaching cellulosic materials. FI45574C (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FI701311A FI45574C (en) 1970-05-11 1970-05-11 Process for bleaching cellulosic materials.
DE2040763A DE2040763C3 (en) 1970-05-11 1970-08-17 Process for bleaching and delignification of a cellulosic substance
ZA712989A ZA712989B (en) 1970-05-11 1971-05-07 Process for bleaching cellulose-containing materials
NO1752/71A NO127205B (en) 1970-05-11 1971-05-10
CA112,573A CA946107A (en) 1970-05-11 1971-05-10 Process for bleaching cellulose-containing materials
SE7106108A SE373396B (en) 1970-05-11 1971-05-11 PROCEDURE FOR BLEACHING AND DELIGNIFICATION OF CELLULOSIC MATERIAL IN ALKALINE SOLUTION USING OXYGEN OR FREE ACID CONTAINING GAS AND THEN PEROXIDE AS A SECOND BLEACHING STEP
BR2828/71A BR7102828D0 (en) 1970-05-11 1971-05-11 PROCEDURE FOR ACCOMMODATION AND DELINHIFICATION OF MATERIAL CONTAINING CELLULOSE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI701311A FI45574C (en) 1970-05-11 1970-05-11 Process for bleaching cellulosic materials.

Publications (2)

Publication Number Publication Date
FI45574B FI45574B (en) 1972-04-04
FI45574C true FI45574C (en) 1972-07-10

Family

ID=8505417

Family Applications (1)

Application Number Title Priority Date Filing Date
FI701311A FI45574C (en) 1970-05-11 1970-05-11 Process for bleaching cellulosic materials.

Country Status (7)

Country Link
BR (1) BR7102828D0 (en)
CA (1) CA946107A (en)
DE (1) DE2040763C3 (en)
FI (1) FI45574C (en)
NO (1) NO127205B (en)
SE (1) SE373396B (en)
ZA (1) ZA712989B (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE373395B (en) * 1972-12-19 1975-02-03 Mo Och Domsjoe Ab PROCEDURE FOR THE PRODUCTION OF CELLULOSA MASS WITH HIGH LIGHTNESS BY DISTRIBUTING WOOD WITH ACID GAS UNDER PRESSURE IN THE PRESENCE OF A COCK
SE420430B (en) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab PROCEDURE FOR WHEATING AND EXTRACTION OF LIGNOCELLULOSALLY MATERIALS WITH PEROXID CONTAINING BLACKS
US4410397A (en) 1978-04-07 1983-10-18 International Paper Company Delignification and bleaching process and solution for lignocellulosic pulp with peroxide in the presence of metal additives
US4372812A (en) * 1978-04-07 1983-02-08 International Paper Company Chlorine free process for bleaching lignocellulosic pulp
FR2457339A1 (en) * 1979-05-25 1980-12-19 Interox PROCESS FOR THE DELIGNIFICATION AND BLEACHING OF CHEMICAL AND SEMI-CHEMICAL CELLULOSIC PASTA
DE3207157C1 (en) * 1982-02-27 1983-06-09 Degussa Ag, 6000 Frankfurt Process for the production of semi-bleached cellulose
FR2566015B1 (en) * 1984-06-15 1986-08-29 Centre Tech Ind Papier PROCESS FOR BLEACHING MECHANICAL PASTE WITH HYDROGEN PEROXIDE
DE3428352A1 (en) * 1984-08-01 1986-02-13 Degussa Ag, 6000 Frankfurt METHOD FOR DELIGNIFICATION AND BLEACHING OF CELLULAS
DE3802401A1 (en) * 1988-01-28 1989-08-03 Degussa METHOD FOR PRODUCING SEMI-BLEACHED FUEL
FI89516B (en) 1989-05-10 1993-06-30 Ahlstroem Oy Foerfarande Foer blekning av cellulosamassa med Otson
DE69004492T3 (en) * 1989-06-06 2001-11-15 Eka Nobel Ab Process for bleaching pulps containing lignocellulose.
SE466061B (en) * 1990-04-23 1991-12-09 Eka Nobel Ab Bleaching of chemical pulp by treatment with first a complexing agent and then a peroxide containing substance
SE9001481L (en) * 1990-04-23 1991-10-24 Eka Nobel Ab REDUCTION OF HALOGEN ORGANIC SUBSTANCES IN BLEACHING WASTE
SE9301960L (en) * 1993-06-08 1994-07-25 Kvaerner Pulping Tech Bleaching of chemical pulp with peroxide at overpressure
WO1997027358A2 (en) * 1995-12-07 1997-07-31 Beloit Technologies, Inc. Oxygen delignification of medium consistency pulp slurry
US6375797B1 (en) * 1996-06-20 2002-04-23 Andritz-Ahlstrom Oy Bleaching chemical pulp in a PkDQ-Po Sequence
BE1011129A4 (en) * 1997-04-25 1999-05-04 Solvay Interox Delignification continuous process and / or money virgin pulp chemical or recycled.

Also Published As

Publication number Publication date
CA946107A (en) 1974-04-30
SE373396B (en) 1975-02-03
ZA712989B (en) 1972-01-26
DE2040763B2 (en) 1975-02-20
DE2040763A1 (en) 1971-11-18
DE2040763C3 (en) 1975-10-02
FI45574B (en) 1972-04-04
NO127205B (en) 1973-05-21
BR7102828D0 (en) 1973-05-03

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