FI52878C - Foerfarande foer blekning av cellulosahaltigt material. - Google Patents

Foerfarande foer blekning av cellulosahaltigt material. Download PDF

Info

Publication number: FI52878C
Authority: FI; Finland
Prior art keywords: oxygen; alkali; bleaching; mass; pulp
Prior art date: 1973-12-20

Application number

FI743702A

Other languages

English (en)

Finnish (fi)

Swedish (sv)

Other versions

FI52878B (ru

FI370274A (ru

Inventor

Frey Viking Sundman

Original Assignee

Ahlstroem 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.)

1973-12-20

Filing date

1974-12-19

Publication date

1987-09-24

1974-12-19 Application filed by Ahlstroem Oy filed Critical Ahlstroem Oy

1975-06-21 Publication of FI370274A publication Critical patent/FI370274A/fi

1977-08-31 Publication of FI52878B publication Critical patent/FI52878B/fi

1987-09-24 Application granted granted Critical

1987-09-24 Publication of FI52878C publication Critical patent/FI52878C/fi

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
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
- 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
- D21C9/1026—Other features in bleaching processes
- D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes

Landscapes

Life Sciences & Earth Sciences (AREA)
Engineering & Computer Science (AREA)
Wood Science & Technology (AREA)
Paper (AREA)
Compositions Of Macromolecular Compounds (AREA)
Conductive Materials (AREA)
Pigments, Carbon Blacks, Or Wood Stains (AREA)

FI743702A 1973-12-20 1974-12-19 Foerfarande foer blekning av cellulosahaltigt material. FI52878C (fi)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
SE7317221		1973-12-20
SE7317221A SE390549C (sv)	1973-12-20	1973-12-20	Sett att bleka cellulosahaltigt material med syre eller fritt syre innehallande gas i alkalisk miljo

Publications (3)

Publication Number	Publication Date
FI370274A FI370274A (ru)	1975-06-21
FI52878B FI52878B (ru)	1977-08-31
FI52878C true FI52878C (fi)	1987-09-24

Family

ID=20319462

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FI743702A FI52878C (fi)	1973-12-20	1974-12-19	Foerfarande foer blekning av cellulosahaltigt material.

Country Status (12)

Country	Link
JP (1)	JPS524643B2 (ru)
BR (1)	BR7410652D0 (ru)
CA (1)	CA1065105A (ru)
DE (1)	DE2460144B2 (ru)
FI (1)	FI52878C (ru)
FR (1)	FR2255419B1 (ru)
GB (1)	GB1452710A (ru)
IT (1)	IT1027773B (ru)
NO (1)	NO142128C (ru)
SE (1)	SE390549C (ru)
SU (1)	SU850019A3 (ru)
ZA (1)	ZA747918B (ru)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS563214Y2 (ru) *	1978-05-15	1981-01-24
US4209359A (en) *	1978-10-23	1980-06-24	International Paper Company	Process for removing residual oxygen from oxygen-bleached pulp
SE462919B (sv) *	1979-05-11	1990-09-17	Sunds Defibrator Ind Ab	Saett att genomfoera alkaliextraktion av cellulosamassa i naervaro av syre
US4574032A (en) *	1979-10-15	1986-03-04	Westvaco Corporation	Process for delignification of lignocellulosic material in the presence of anthraquinone in solution with white and black liquors
SE452896B (sv) *	1985-01-24	1987-12-21	Aga Ab	Forfarande for behandling av cellulosamassor
SE460202B (sv) *	1987-03-13	1989-09-18	Aga Ab	Saett vid behandling av ett material med en gas i en vaetska
FI89516B (fi) *	1989-05-10	1993-06-30	Ahlstroem Oy	Foerfarande foer blekning av cellulosamassa med otson
US5460696A (en) *	1993-08-12	1995-10-24	The Boc Group, Inc.	Oxygen delignification method incorporating wood pulp mixing apparatus

1973
- 1973-12-20 SE SE7317221A patent/SE390549C/xx unknown
1974
- 1974-12-11 CA CA215,743A patent/CA1065105A/en not_active Expired
- 1974-12-12 ZA ZA00747918A patent/ZA747918B/xx unknown
- 1974-12-13 GB GB5403874A patent/GB1452710A/en not_active Expired
- 1974-12-19 JP JP49146650A patent/JPS524643B2/ja not_active Expired
- 1974-12-19 NO NO744609A patent/NO142128C/no unknown
- 1974-12-19 DE DE19742460144 patent/DE2460144B2/de not_active Ceased
- 1974-12-19 BR BR10652/74A patent/BR7410652D0/pt unknown
- 1974-12-19 SU SU742090807A patent/SU850019A3/ru active
- 1974-12-19 FI FI743702A patent/FI52878C/fi active
- 1974-12-19 IT IT70687/74A patent/IT1027773B/it active
- 1974-12-20 FR FR7442400A patent/FR2255419B1/fr not_active Expired

Also Published As

Publication number	Publication date
BR7410652D0 (pt)	1975-09-02
NO744609L (ru)	1975-07-14
GB1452710A (en)	1976-10-13
SU850019A3 (ru)	1981-07-23
FI52878B (ru)	1977-08-31
FR2255419B1 (ru)	1979-06-01
JPS524643B2 (ru)	1977-02-05
SE390549C (sv)	1986-04-14
NO142128C (no)	1980-07-02
SE390549B (sv)	1976-12-27
FI370274A (ru)	1975-06-21
JPS5094202A (ru)	1975-07-26
DE2460144B2 (de)	1977-03-03
DE2460144A1 (de)	1975-07-03
CA1065105A (en)	1979-10-30
ZA747918B (en)	1975-12-31
IT1027773B (it)	1978-12-20
SE7317221L (ru)	1975-06-23
NO142128B (no)	1980-03-24
FR2255419A1 (ru)	1975-07-18

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