FI953589A - Method for chlorine-free bleaching of pulp with acetic acid as acidifying agent - Google Patents

Method for chlorine-free bleaching of pulp with acetic acid as acidifying agent Download PDF

Info

Publication number: FI953589A
Authority: FI; Finland
Prior art keywords: pulp; chlorine; acetic acid; acidifying agent; free bleaching
Prior art date: 1993-01-29

Application number

FI953589A

Other languages

Finnish (fi)

Swedish (sv)

Other versions

FI953589A0 (en

FI111387B (en

Inventor

Erik Nilsson

Petter Tibbling

Original Assignee

Kvaerner Pulping Tech

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.)

1993-01-29

Filing date

1995-07-27

Publication date

1995-07-27

1995-07-27 Application filed by Kvaerner Pulping Tech filed Critical Kvaerner Pulping Tech

1995-07-27 Publication of FI953589A publication Critical patent/FI953589A/en

1995-07-27 Publication of FI953589A0 publication Critical patent/FI953589A0/en

2003-07-15 Application granted granted Critical

2003-07-15 Publication of FI111387B publication Critical patent/FI111387B/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
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids
- 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
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
- 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
- D21C9/1042—Use of chelating agents
- 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
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

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

FI953589A 1993-01-29 1995-07-27 Method for chlorine-free bleaching of pulp with acetic acid as an acidifying agent FI111387B (en)

Applications Claiming Priority (4)

Application Number	Priority Date	Filing Date	Title
SE9300277		1993-01-29
SE9300277A SE501325E (en)	1993-01-29	1993-01-29	Process for chlorine-free bleaching of pulp, wherein the pulp is acidified with acetic acid in the treatment with complexing agents
SE9400054		1994-01-26
PCT/SE1994/000054 WO1994017239A1 (en)	1993-01-29	1994-01-26	Method for chlorine-free bleaching of pulp with acetic acid as acidifying agent

Publications (3)

Publication Number	Publication Date
FI953589A true FI953589A (en)	1995-07-27
FI953589A0 FI953589A0 (en)	1995-07-27
FI111387B FI111387B (en)	2003-07-15

Family

ID=20388704

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FI953589A FI111387B (en)	1993-01-29	1995-07-27	Method for chlorine-free bleaching of pulp with acetic acid as an acidifying agent

Country Status (10)

Country	Link
EP (1)	EP0681624A1 (en)
JP (1)	JPH08505907A (en)
CN (1)	CN1117301A (en)
AU (1)	AU675291B2 (en)
BR (1)	BR9406193A (en)
CA (1)	CA2154076A1 (en)
FI (1)	FI111387B (en)
NO (1)	NO305763B1 (en)
SE (1)	SE501325E (en)
WO (1)	WO1994017239A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN1050642C (en) *	1996-06-25	2000-03-22	华南理工大学	Everyday production 30-150 ton high concentration paper pulp bleaching method by using hydrogen peroxide
CN103726382B (en) *	2013-12-31	2016-08-17	安徽泾县千年古宣宣纸有限公司	A kind of pure straw Chinese art paper and chloride-free bleaching production process thereof
EP3882380B1 (en) *	2020-03-16	2022-04-27	Re:NewCell AB	One stage method for acid metal removal and bleach

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2219505C3 (en) *	1972-04-21	1974-10-17	Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt	Chlorine-free multi-stage bleaching of cellulose
DE2841013C2 (en) *	1978-09-21	1984-06-07	Degussa Ag, 6000 Frankfurt	Process for full bleaching of pulp
ATE97179T1 (en) *	1989-06-06	1993-11-15	Eka Nobel Ab	PROCESS FOR BLEACHING LIGNOCELLULOSE CONTAINING PULP.
SE468355B (en) *	1991-04-30	1992-12-21	Eka Nobel Ab	CHEMISTRY OF CHEMICAL MASS THROUGH TREATMENT WITH COMPLEX PICTURES AND OZONE

1993
- 1993-01-29 SE SE9300277A patent/SE501325E/en not_active IP Right Cessation
1994
- 1994-01-26 CA CA 2154076 patent/CA2154076A1/en not_active Abandoned
- 1994-01-26 JP JP6516930A patent/JPH08505907A/en active Pending
- 1994-01-26 CN CN 94191058 patent/CN1117301A/en active Pending
- 1994-01-26 AU AU59820/94A patent/AU675291B2/en not_active Expired - Fee Related
- 1994-01-26 EP EP94905899A patent/EP0681624A1/en not_active Ceased
- 1994-01-26 BR BR9406193A patent/BR9406193A/en not_active IP Right Cessation
- 1994-01-26 WO PCT/SE1994/000054 patent/WO1994017239A1/en active IP Right Grant
1995
- 1995-07-24 NO NO952935A patent/NO305763B1/en not_active IP Right Cessation
- 1995-07-27 FI FI953589A patent/FI111387B/en active

Also Published As

Publication number	Publication date
CN1117301A (en)	1996-02-21
SE501325E (en)	1999-09-20
NO952935L (en)	1995-09-13
JPH08505907A (en)	1996-06-25
FI953589A0 (en)	1995-07-27
CA2154076A1 (en)	1994-08-04
SE9300277L (en)	1994-07-30
NO952935D0 (en)	1995-07-24
WO1994017239A1 (en)	1994-08-04
NO305763B1 (en)	1999-07-19
SE9300277D0 (en)	1993-01-29
EP0681624A1 (en)	1995-11-15
SE501325C2 (en)	1995-01-16
AU5982094A (en)	1994-08-15
BR9406193A (en)	1996-01-09
AU675291B2 (en)	1997-01-30
FI111387B (en)	2003-07-15

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