NO961815L - Fremgangsmåte for separering av metallioner fra masse - Google Patents
Fremgangsmåte for separering av metallioner fra masseInfo
- Publication number
- NO961815L NO961815L NO961815A NO961815A NO961815L NO 961815 L NO961815 L NO 961815L NO 961815 A NO961815 A NO 961815A NO 961815 A NO961815 A NO 961815A NO 961815 L NO961815 L NO 961815L
- Authority
- NO
- Norway
- Prior art keywords
- metal ions
- flow
- pulp
- pct
- washing
- Prior art date
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
- D21C9/1026—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
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Extraction Or Liquid Replacement (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Disintegrating Or Milling (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
En fremgangsmåte for separering av metallioner fra masse av lignocelluloseholdig materiale. En hovedstrøra (1) av massen behandles med chelatdanner (12) og vaskes (3) forut for blekingen (5) av massen med hydroperoksid eller ozon. Prosessvann (4) som er vasket ut ved vaskingen (3) og inneholder metall- ioner, blandes med masse, som ikke senere skal ble- kes med hydroperoksid eller ozon ved pH over 7, hvor- ved metallioner i det vesentlige bindes til denne masse. Deretter blir en væskefase (9, 17) som er vesentlig fri for metallioner vasket ut av denne masse. Deretter blir pH i denne masse senket til under 3, hvorved hoveddelen av metallionene frigjø- res fra massen og vaskes ut.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9303644A SE501985C2 (sv) | 1993-11-05 | 1993-11-05 | Förfarande för avskiljning av metalljoner från massa i samband med blekning av massan |
PCT/SE1994/000930 WO1995012710A1 (en) | 1993-11-05 | 1994-10-06 | A method of separating metal ions from pulp |
Publications (2)
Publication Number | Publication Date |
---|---|
NO961815L true NO961815L (no) | 1996-05-03 |
NO961815D0 NO961815D0 (no) | 1996-05-03 |
Family
ID=20391642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO961815A NO961815D0 (no) | 1993-11-05 | 1996-05-03 | Fremgangsmåte for separering av metallioner fra masse |
Country Status (13)
Country | Link |
---|---|
US (1) | US5980689A (no) |
EP (1) | EP0726980B1 (no) |
JP (1) | JPH09504582A (no) |
AT (1) | ATE175737T1 (no) |
AU (1) | AU1036595A (no) |
BR (1) | BR9407975A (no) |
CA (1) | CA2173735A1 (no) |
DE (1) | DE69415997T2 (no) |
FI (1) | FI961882A0 (no) |
NO (1) | NO961815D0 (no) |
SE (1) | SE501985C2 (no) |
WO (1) | WO1995012710A1 (no) |
ZA (1) | ZA948015B (no) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7297225B2 (en) * | 2004-06-22 | 2007-11-20 | Georgia-Pacific Consumer Products Lp | Process for high temperature peroxide bleaching of pulp with cool discharge |
FI128968B (en) * | 2020-03-31 | 2021-04-15 | Chempolis Oy | Peroxide bleaching of cellulose pulp |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE97179T1 (de) * | 1989-06-06 | 1993-11-15 | Eka Nobel Ab | Verfahren zum bleichen von lignocellulose enthaltenden zellstoffen. |
SE468355B (sv) * | 1991-04-30 | 1992-12-21 | Eka Nobel Ab | Blekning av kemisk massa genom behandling med komplexbildare och ozon |
EP0564443A1 (en) * | 1992-03-15 | 1993-10-06 | Kamyr, Inc. | Treatment of bleach plant filtrates |
CA2090396A1 (en) * | 1992-04-03 | 1993-10-04 | Josef Theurer | Tamping machine with a two-sleeper tamping unit |
SE469387B (sv) * | 1992-05-11 | 1993-06-28 | Kamyr Ab | Saett vid blekning av massa utan anvaendning av klorkemikalier |
SE500113C2 (sv) * | 1992-07-09 | 1994-04-18 | Kamyr Ab | Sätt vid blekning av massa för omhändertagande av utlösta metaller |
SE9301160L (sv) * | 1992-08-28 | 1994-03-01 | Sunds Defibrator Ind Ab | Förfarande för behandling av processvatten |
-
1993
- 1993-11-05 SE SE9303644A patent/SE501985C2/sv not_active IP Right Cessation
-
1994
- 1994-10-06 BR BR9407975A patent/BR9407975A/pt not_active Application Discontinuation
- 1994-10-06 CA CA002173735A patent/CA2173735A1/en not_active Abandoned
- 1994-10-06 AU AU10365/95A patent/AU1036595A/en not_active Abandoned
- 1994-10-06 US US08/624,608 patent/US5980689A/en not_active Expired - Fee Related
- 1994-10-06 EP EP95900957A patent/EP0726980B1/en not_active Expired - Lifetime
- 1994-10-06 AT AT95900957T patent/ATE175737T1/de not_active IP Right Cessation
- 1994-10-06 WO PCT/SE1994/000930 patent/WO1995012710A1/en active IP Right Grant
- 1994-10-06 JP JP7513155A patent/JPH09504582A/ja active Pending
- 1994-10-06 DE DE69415997T patent/DE69415997T2/de not_active Expired - Fee Related
- 1994-10-13 ZA ZA948015A patent/ZA948015B/xx unknown
-
1996
- 1996-05-03 NO NO961815A patent/NO961815D0/no unknown
- 1996-05-03 FI FI961882A patent/FI961882A0/fi unknown
Also Published As
Publication number | Publication date |
---|---|
DE69415997T2 (de) | 1999-05-27 |
SE9303644D0 (sv) | 1993-11-05 |
FI961882A (fi) | 1996-05-03 |
AU1036595A (en) | 1995-05-23 |
ATE175737T1 (de) | 1999-01-15 |
US5980689A (en) | 1999-11-09 |
EP0726980A1 (en) | 1996-08-21 |
FI961882A0 (fi) | 1996-05-03 |
WO1995012710A1 (en) | 1995-05-11 |
SE9303644L (sv) | 1995-05-06 |
DE69415997D1 (de) | 1999-02-25 |
EP0726980B1 (en) | 1999-01-13 |
SE501985C2 (sv) | 1995-07-03 |
JPH09504582A (ja) | 1997-05-06 |
NO961815D0 (no) | 1996-05-03 |
ZA948015B (en) | 1995-05-31 |
BR9407975A (pt) | 1996-12-03 |
CA2173735A1 (en) | 1995-05-11 |
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