PT97537A - Processo de branqueamento de pasta quimica em pelo menos quatro passos - Google Patents

Processo de branqueamento de pasta quimica em pelo menos quatro passos

Info

Publication number: PT97537A
Authority: PT; Portugal
Prior art keywords: pct; steps; chlorine dioxide; bleaching; sec
Prior art date: 1990-04-30

Application number

PT97537A

Other languages

English (en)

Other versions

PT97537B (pt

Inventor

Per-Ake Farnstrand

Lars T Sjodin

Lars-Ake Lindstrom

K Solveig E Norden

Original Assignee

Sunds Defibrator Ind 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.)

1990-04-30

Filing date

1991-04-30

Publication date

1992-01-31

1991-04-30 Application filed by Sunds Defibrator Ind Ab filed Critical Sunds Defibrator Ind Ab

1992-01-31 Publication of PT97537A publication Critical patent/PT97537A/pt

1998-08-31 Publication of PT97537B publication Critical patent/PT97537B/pt

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
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
- 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
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
- D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
- D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process
- 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
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution

Landscapes

Life Sciences & Earth Sciences (AREA)
Engineering & Computer Science (AREA)
Wood Science & Technology (AREA)
Paper (AREA)
Detergent Compositions (AREA)
Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
Diaphragms For Electromechanical Transducers (AREA)
Nonmetallic Welding Materials (AREA)
Lubricants (AREA)
Saccharide Compounds (AREA)
Coloring Foods And Improving Nutritive Qualities (AREA)

PT97537A 1990-04-30 1991-04-30 Processo de branqueamento de pasta quimica em pelo menos quatro passos PT97537B (pt)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
SE9001548A SE466062B (sv)	1990-04-30	1990-04-30	Blekning av kemisk massa

Publications (2)

Publication Number	Publication Date
PT97537A true PT97537A (pt)	1992-01-31
PT97537B PT97537B (pt)	1998-08-31

Family

ID=20379338

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
PT97537A PT97537B (pt)	1990-04-30	1991-04-30	Processo de branqueamento de pasta quimica em pelo menos quatro passos

Country Status (16)

Country	Link
US (1)	US5589031A (pt)
EP (1)	EP0527808B1 (pt)
JP (1)	JPH05506698A (pt)
AT (1)	ATE106962T1 (pt)
AU (1)	AU639335B2 (pt)
BR (1)	BR9106390A (pt)
CA (1)	CA2080242A1 (pt)
DE (1)	DE69102430T2 (pt)
ES (1)	ES2055602T3 (pt)
FI (1)	FI106215B (pt)
NO (1)	NO179417C (pt)
NZ (1)	NZ237528A (pt)
PT (1)	PT97537B (pt)
SE (1)	SE466062B (pt)
WO (1)	WO1991017306A1 (pt)
ZA (1)	ZA912504B (pt)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US6322768B1 (en)	1998-09-29	2001-11-27	International Paper Company	Recovery of chlorine dioxide from gas streams
SE518692C2 (sv) *	2001-03-20	2002-11-05	Metso Paper Inc	Blekning av massa med klordioxid
SE532370C2 (sv)	2008-02-28	2009-12-29	Metso Paper Inc	Metod för blekning av en massa

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2432574A1 (fr) *	1978-08-01	1980-02-29	Europeen Cellulose	Procede de blanchiment de pate a papier
SE462919B (sv) *	1979-05-11	1990-09-17	Sunds Defibrator Ind Ab	Saett att genomfoera alkaliextraktion av cellulosamassa i naervaro av syre
US4568420B1 (en) *	1984-12-03	1999-03-02	Int Paper Co	Multi-stage bleaching process including an enhanced oxidative extraction stage
US4657633A (en) *	1985-05-24	1987-04-14	Westvaco Corporation	Delignification and bleaching of a cellulose pulp with an alkalioxygen-hypochlorite single stage sequential extraction

1990
- 1990-04-30 SE SE9001548A patent/SE466062B/sv not_active IP Right Cessation
1991
- 1991-03-07 WO PCT/SE1991/000178 patent/WO1991017306A1/en active IP Right Grant
- 1991-03-07 AT AT91908393T patent/ATE106962T1/de not_active IP Right Cessation
- 1991-03-07 BR BR919106390A patent/BR9106390A/pt not_active Application Discontinuation
- 1991-03-07 US US07/930,665 patent/US5589031A/en not_active Expired - Fee Related
- 1991-03-07 DE DE69102430T patent/DE69102430T2/de not_active Expired - Fee Related
- 1991-03-07 JP JP91507954A patent/JPH05506698A/ja active Pending
- 1991-03-07 EP EP91908393A patent/EP0527808B1/en not_active Expired - Lifetime
- 1991-03-07 AU AU77427/91A patent/AU639335B2/en not_active Ceased
- 1991-03-07 CA CA002080242A patent/CA2080242A1/en not_active Abandoned
- 1991-03-07 ES ES91908393T patent/ES2055602T3/es not_active Expired - Lifetime
- 1991-03-21 NZ NZ237528A patent/NZ237528A/xx unknown
- 1991-04-04 ZA ZA912504A patent/ZA912504B/xx unknown
- 1991-04-30 PT PT97537A patent/PT97537B/pt not_active IP Right Cessation
1992
- 1992-10-28 FI FI924889A patent/FI106215B/fi active
- 1992-10-29 NO NO924182A patent/NO179417C/no unknown

Also Published As

Publication number	Publication date
CA2080242A1 (en)	1991-10-31
FI924889A0 (fi)	1992-10-28
ES2055602T3 (es)	1994-08-16
AU7742791A (en)	1991-11-27
NO924182L (no)	1992-10-29
BR9106390A (pt)	1993-04-27
NO924182D0 (no)	1992-10-29
FI106215B (fi)	2000-12-15
DE69102430T2 (de)	1994-09-29
US5589031A (en)	1996-12-31
FI924889A (fi)	1992-10-28
SE9001548D0 (sv)	1990-04-30
NO179417C (no)	1996-10-02
ATE106962T1 (de)	1994-06-15
AU639335B2 (en)	1993-07-22
PT97537B (pt)	1998-08-31
JPH05506698A (ja)	1993-09-30
SE466062B (sv)	1991-12-09
EP0527808A1 (en)	1993-02-24
EP0527808B1 (en)	1994-06-08
SE9001548L (sv)	1991-10-31
NO179417B (no)	1996-06-24
WO1991017306A1 (en)	1991-11-14
NZ237528A (en)	1993-06-25
ZA912504B (en)	1992-01-29
DE69102430D1 (de)	1994-07-14

Publication	Publication Date	Title
IN189584B (pt)	2003-03-29
SE8100373L (sv)	1981-07-25	Forfarande vid ozonblekning av pappersmassa
ID19415A (id)	1998-07-09	Proses pemutihan bubur kayu
SE0302088D0 (sv)	2003-07-17	Method of xylanase in bleaching
PT97537A (pt)	1992-01-31	Processo de branqueamento de pasta quimica em pelo menos quatro passos
ES2185715T3 (es)	2003-05-01	Blanqueo de pasta papelera.
SE9702583L (sv)	1998-01-09	Förfarande för massaframställning
AU6986294A (en)	1995-01-03	Method of bleaching pulp without using chlorine chemicals
FI961975A0 (fi)	1996-05-09	Menetelmän kemiallisen paperimassan valkaisemiseksi
AU6839996A (en)	1997-03-19	Treatment of pulp with chelating agent in at least two mixing steps without intermediate washing

Legal Events

Date	Code	Title	Description
1992-01-31	BB1A	Laying open of patent application	Effective date: 19910918
1998-08-31	FG3A	Patent granted, date of granting	Effective date: 19980518
2000-03-31	MM3A	Annulment or lapse	Free format text: LAPSE DUE TO NON-PAYMENT OF FEES Effective date: 19991130

Date

Code

Title

Description

1992-01-31

BB1A

Laying open of patent application

Effective date: 19910918

1998-08-31

FG3A

Patent granted, date of granting

Effective date: 19980518

2000-03-31

MM3A

Annulment or lapse

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 19991130