SE9401771D0 - Process for removal of metal compounds in lignocellulosic pulp - Google Patents
Process for removal of metal compounds in lignocellulosic pulpInfo
- Publication number
- SE9401771D0 SE9401771D0 SE9401771A SE9401771A SE9401771D0 SE 9401771 D0 SE9401771 D0 SE 9401771D0 SE 9401771 A SE9401771 A SE 9401771A SE 9401771 A SE9401771 A SE 9401771A SE 9401771 D0 SE9401771 D0 SE 9401771D0
- Authority
- SE
- Sweden
- Prior art keywords
- pct
- metal compounds
- pulp
- during
- oxygen bleaching
- 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
- D21C9/147—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)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Compounds Of Unknown Constitution (AREA)
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9401771A SE9401771D0 (sv) | 1994-05-24 | 1994-05-24 | Process for removal of metal compounds in lignocellulosic pulp |
BR9507751A BR9507751A (pt) | 1994-05-24 | 1995-04-21 | Processo para a remoção de compostos de metal em polpa lignocelulósica |
DE69522802T DE69522802T2 (de) | 1994-05-24 | 1995-04-21 | Verfahren zur entfernung von metallverbindungen im lignocellulosischen zellstoff |
CA002191081A CA2191081C (en) | 1994-05-24 | 1995-04-21 | Process for removal of metal compounds in lignocellulosic pulp |
US08/737,221 US5985097A (en) | 1994-05-24 | 1995-04-21 | Method for suppressing undesired effects of transition and alkaline metal compounds during bleaching |
AT95920325T ATE205899T1 (de) | 1994-05-24 | 1995-04-21 | Verfahren zur entfernung von metallverbindungen im lignocellulosischen zellstoff |
PCT/SE1995/000433 WO1995032332A1 (en) | 1994-05-24 | 1995-04-21 | Process for removal of metal compounds in lignocellulosic pulp |
EP95920325A EP0763156B1 (en) | 1994-05-24 | 1995-04-21 | Process for removal of metal compounds in lignocellulosic pulp |
PT95920325T PT763156E (pt) | 1994-05-24 | 1995-04-21 | Processo para remocao de compostos metalicos em pasta lenhocelulosica |
ES95920325T ES2161891T3 (es) | 1994-05-24 | 1995-04-21 | Procedimiento para eliminar compuestos metalicos de la pulpa lignocelulosica. |
JP7530226A JPH10503810A (ja) | 1994-05-24 | 1995-04-21 | リグノセルロースパルプ中の金属化合物の除去方法 |
FI964632A FI964632A (fi) | 1994-05-24 | 1996-11-20 | Menetelmä metalliyhdisteiden poistamiseksi lignoselluloosasulpusta |
NO964968A NO964968L (no) | 1994-05-24 | 1996-11-22 | Fremgangsmåte ved fjerning av metallforbindelser i lignocelluloseholdig masse |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9401771A SE9401771D0 (sv) | 1994-05-24 | 1994-05-24 | Process for removal of metal compounds in lignocellulosic pulp |
Publications (1)
Publication Number | Publication Date |
---|---|
SE9401771D0 true SE9401771D0 (sv) | 1994-05-24 |
Family
ID=20394098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9401771A SE9401771D0 (sv) | 1994-05-24 | 1994-05-24 | Process for removal of metal compounds in lignocellulosic pulp |
Country Status (13)
Country | Link |
---|---|
US (1) | US5985097A (xx) |
EP (1) | EP0763156B1 (xx) |
JP (1) | JPH10503810A (xx) |
AT (1) | ATE205899T1 (xx) |
BR (1) | BR9507751A (xx) |
CA (1) | CA2191081C (xx) |
DE (1) | DE69522802T2 (xx) |
ES (1) | ES2161891T3 (xx) |
FI (1) | FI964632A (xx) |
NO (1) | NO964968L (xx) |
PT (1) | PT763156E (xx) |
SE (1) | SE9401771D0 (xx) |
WO (1) | WO1995032332A1 (xx) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6331354B1 (en) * | 1996-08-23 | 2001-12-18 | Weyerhaeuser Company | Alkaline pulp having low average degree of polymerization values and method of producing the same |
US6605350B1 (en) * | 1996-08-23 | 2003-08-12 | Weyerhaeuser Company | Sawdust alkaline pulp having low average degree of polymerization values and method of producing the same |
US20040207110A1 (en) * | 2003-04-16 | 2004-10-21 | Mengkui Luo | Shaped article from unbleached pulp and the process |
US7097737B2 (en) * | 2003-04-16 | 2006-08-29 | Weyerhaeuser Company | Method of making a modified unbleached pulp for lyocell products |
US6833187B2 (en) * | 2003-04-16 | 2004-12-21 | Weyerhaeuser Company | Unbleached pulp for lyocell products |
US6790527B1 (en) | 2003-04-16 | 2004-09-14 | Weyerhaeuser Company | Lyocell fiber from unbleached pulp |
US20060065377A1 (en) * | 2004-09-30 | 2006-03-30 | Mengkui Luo | High PH treatment of pulp in a bleach sequence to produce pulp having low D.P. and low copper number for use in lyocell manufacture |
US20060070711A1 (en) * | 2004-09-30 | 2006-04-06 | Mengkui Luo | Low pH treatment of pulp in a bleach sequence to produce pulp having low D.P. and low copper number for use in lyocell manufacture |
US20090090478A1 (en) * | 2007-10-05 | 2009-04-09 | Hollomon Martha G | Selectivity improvement in oxygen delignification and bleaching of lignocellulose pulp using singlet oxygen |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE360128C (sv) * | 1970-08-25 | 1983-10-31 | Mo Och Domsjoe Ab | Sett att bleka cellulosamassa med en syreinnehallande gas i nervaro av alkali |
US4087318A (en) * | 1974-03-14 | 1978-05-02 | Mo Och Domsjo Aktiebolag | Oxygen-alkali delignification of lignocellulosic material in the presence of a manganese compound |
GB1505529A (en) * | 1974-06-14 | 1978-03-30 | Mo Och Domsjoe Ab | Method for the oxygen-gas delignification of lignocellulosic material and apparatus for carrying out the method |
WO1992017639A1 (en) * | 1991-04-08 | 1992-10-15 | International Paper Company | Method for reducing colored matter from bleach effluent using a dzd bleach sequence |
WO1994010375A1 (en) * | 1992-10-26 | 1994-05-11 | Kamyr, Inc. | Displacement chelate treatment of pulp |
-
1994
- 1994-05-24 SE SE9401771A patent/SE9401771D0/xx unknown
-
1995
- 1995-04-21 EP EP95920325A patent/EP0763156B1/en not_active Expired - Lifetime
- 1995-04-21 AT AT95920325T patent/ATE205899T1/de active
- 1995-04-21 CA CA002191081A patent/CA2191081C/en not_active Expired - Fee Related
- 1995-04-21 WO PCT/SE1995/000433 patent/WO1995032332A1/en active IP Right Grant
- 1995-04-21 DE DE69522802T patent/DE69522802T2/de not_active Expired - Fee Related
- 1995-04-21 US US08/737,221 patent/US5985097A/en not_active Expired - Fee Related
- 1995-04-21 PT PT95920325T patent/PT763156E/pt unknown
- 1995-04-21 ES ES95920325T patent/ES2161891T3/es not_active Expired - Lifetime
- 1995-04-21 JP JP7530226A patent/JPH10503810A/ja active Pending
- 1995-04-21 BR BR9507751A patent/BR9507751A/pt active Search and Examination
-
1996
- 1996-11-20 FI FI964632A patent/FI964632A/fi unknown
- 1996-11-22 NO NO964968A patent/NO964968L/no not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
CA2191081A1 (en) | 1995-11-30 |
EP0763156B1 (en) | 2001-09-19 |
FI964632A0 (fi) | 1996-11-20 |
DE69522802T2 (de) | 2002-04-11 |
NO964968D0 (no) | 1996-11-22 |
ATE205899T1 (de) | 2001-10-15 |
DE69522802D1 (de) | 2001-10-25 |
US5985097A (en) | 1999-11-16 |
WO1995032332A1 (en) | 1995-11-30 |
EP0763156A1 (en) | 1997-03-19 |
JPH10503810A (ja) | 1998-04-07 |
PT763156E (pt) | 2002-02-28 |
CA2191081C (en) | 2001-07-03 |
FI964632A (fi) | 1997-01-14 |
BR9507751A (pt) | 1997-08-19 |
ES2161891T3 (es) | 2001-12-16 |
NO964968L (no) | 1996-11-22 |
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