FI45574B - - Google Patents

Info

Publication number: FI45574B
Authority: FI; Finland

Application number

FI1311/70A

Other languages

Finnish (fi)

Other versions

FI45574C (en

Inventor

P Koivisto

I Lasenius

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.)

1970-05-11

Filing date

1970-05-11

Publication date

1972-04-04

1970-05-11 Application filed by Kymin Oy Kymmene Ab filed Critical Kymin Oy Kymmene Ab

1970-05-11 Priority to FI701311A priority Critical patent/FI45574C/en

1970-08-17 Priority to DE2040763A priority patent/DE2040763C3/en

1971-05-07 Priority to ZA712989A priority patent/ZA712989B/en

1971-05-10 Priority to NO1752/71A priority patent/NO127205B/no

1971-05-10 Priority to CA112,573A priority patent/CA946107A/en

1971-05-11 Priority to BR2828/71A priority patent/BR7102828D0/en

1971-05-11 Priority to SE7106108A priority patent/SE373396B/en

1972-04-04 Publication of FI45574B publication Critical patent/FI45574B/fi

1972-07-10 Application granted granted Critical

1972-07-10 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

Landscapes

Life Sciences & Earth Sciences (AREA)
Engineering & Computer Science (AREA)
Wood Science & Technology (AREA)
Paper (AREA)

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
BR2828/71A BR7102828D0 (en)	1970-05-11	1971-05-11	PROCEDURE FOR ACCOMMODATION AND DELINHIFICATION OF MATERIAL CONTAINING CELLULOSE
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

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 true FI45574B (en)	1972-04-04
FI45574C 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
DK0402335T4 (en) *	1989-06-06	2001-06-25	Eka Chemicals Ab	Method for bleaching lignocellulosic pulp
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
SE500616C2 (en) *	1993-06-08	1994-07-25	Kvaerner Pulping Tech	Bleaching of chemical pulp with peroxide at overpressure
CN1203643A (en) *	1995-12-07	1998-12-30	贝洛特工艺技术公司	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.

1970
- 1970-05-11 FI FI701311A patent/FI45574C/en active
- 1970-08-17 DE DE2040763A patent/DE2040763C3/en not_active Expired
1971
- 1971-05-07 ZA ZA712989A patent/ZA712989B/en unknown
- 1971-05-10 CA CA112,573A patent/CA946107A/en not_active Expired
- 1971-05-10 NO NO1752/71A patent/NO127205B/no unknown
- 1971-05-11 SE SE7106108A patent/SE373396B/en unknown
- 1971-05-11 BR BR2828/71A patent/BR7102828D0/en unknown

Also Published As

Publication number	Publication date
SE373396B (en)	1975-02-03
DE2040763C3 (en)	1975-10-02
CA946107A (en)	1974-04-30
DE2040763A1 (en)	1971-11-18
ZA712989B (en)	1972-01-26
NO127205B (en)	1973-05-21
FI45574C (en)	1972-07-10
DE2040763B2 (en)	1975-02-20
BR7102828D0 (en)	1973-05-03

Publication	Publication Date	Title
AR204384A1 (en)	1976-02-06
ATA96471A (en)	1973-02-15
AU1146470A (en)	1971-08-19
AU1473870A (en)	1971-11-11
AU2044470A (en)	1972-03-30
AU2085370A (en)	1972-04-13
AU1336970A (en)	1971-10-07
AU1517670A (en)	1971-11-18
AU2017870A (en)	1972-03-23
AU1833270A (en)	1972-02-10
AU1716970A (en)	1972-01-06
AU1326870A (en)	1971-10-28
AU2130570A (en)	1972-04-27
AU1591370A (en)	1971-12-09
AU1872870A (en)	1972-02-17
AU2144270A (en)	1972-04-27
AU1328670A (en)	1971-10-07
AU1277070A (en)	1971-09-23
AU1343870A (en)	1971-10-07
AU1247570A (en)	1971-09-16
AU2131570A (en)	1972-04-27
AU2130770A (en)	1972-04-27
AU2119370A (en)	1972-04-20
AU1581370A (en)	1971-12-09
AU1235770A (en)	1971-09-16