DE60301446T2 - Verfahren zur Aufhellung von Pulpe mit Hydrosulfitlösung - Google Patents
Verfahren zur Aufhellung von Pulpe mit Hydrosulfitlösung Download PDFInfo
- Publication number
- DE60301446T2 DE60301446T2 DE60301446T DE60301446T DE60301446T2 DE 60301446 T2 DE60301446 T2 DE 60301446T2 DE 60301446 T DE60301446 T DE 60301446T DE 60301446 T DE60301446 T DE 60301446T DE 60301446 T2 DE60301446 T2 DE 60301446T2
- Authority
- DE
- Germany
- Prior art keywords
- hydrosulfite solution
- brightening
- pulp
- brightening pulp
- hydrosulfite
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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
- D21C9/1084—Bleaching ; Apparatus therefor with reducing compounds
- D21C9/1089—Bleaching ; Apparatus therefor with reducing compounds with dithionites
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US39274502P | 2002-06-28 | 2002-06-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE60301446D1 DE60301446D1 (de) | 2005-10-06 |
DE60301446T2 true DE60301446T2 (de) | 2006-06-14 |
Family
ID=29584654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE60301446T Expired - Fee Related DE60301446T2 (de) | 2002-06-28 | 2003-06-16 | Verfahren zur Aufhellung von Pulpe mit Hydrosulfitlösung |
Country Status (5)
Country | Link |
---|---|
US (1) | US7029554B2 (de) |
EP (1) | EP1375735B1 (de) |
CA (1) | CA2432459A1 (de) |
DE (1) | DE60301446T2 (de) |
NO (1) | NO20032722L (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1418269B1 (de) * | 2002-11-05 | 2009-02-11 | Rohm And Haas Company | Verfahren zum Bleichen von mechanischer Pulpe |
US20040230298A1 (en) * | 2003-04-25 | 2004-11-18 | Medtronic Vascular, Inc. | Drug-polymer coated stent with polysulfone and styrenic block copolymer |
FI121114B (fi) * | 2007-05-04 | 2010-07-15 | Kemira Oyj | Ditioniitin valmistusmenetelmä |
US20100224333A1 (en) | 2009-03-09 | 2010-09-09 | Prasad Duggirala | Method and chemical composition to improve efficiency of mechanical pulp |
US9932709B2 (en) | 2013-03-15 | 2018-04-03 | Ecolab Usa Inc. | Processes and compositions for brightness improvement in paper production |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2071304A (en) * | 1934-12-04 | 1937-02-16 | Great Western Electro Chemical Co | Process of manufacture of products of ground wood pulp |
US3865696A (en) * | 1969-07-16 | 1975-02-11 | Veba Chemie Ag | Recovery of citraconic acid anhydride by isomerization and vacuum distillation |
BE790568A (fr) * | 1971-10-26 | 1973-02-15 | Albright & Wilson | Compositions contenant des dithionites |
NO164310C (no) * | 1984-03-05 | 1990-09-19 | Kamyr Inc | Fremgangsmaate for behandling av en mekanisk masse med hydrosulfitt-blekekjemikalier. |
US4788041A (en) * | 1986-12-22 | 1988-11-29 | Morton Thiokol, Inc. | Apparatus for the production of sodium hydrosulfite |
SE457647B (sv) * | 1987-06-24 | 1989-01-16 | Eka Nobel Ab | Saett vid blekning av material med ditionitloesning |
DE3809332A1 (de) * | 1988-03-19 | 1989-10-05 | Degussa | Mehrstufiges verfahren zur bleiche von holzstoffen |
US5094833A (en) | 1989-01-05 | 1992-03-10 | Morton International, Inc. | High yield sodium hydrosulfite generation |
US5336479A (en) | 1989-01-05 | 1994-08-09 | Morton International, Inc. | High yield sodium hydrosulfite generation |
US5169555A (en) | 1990-11-09 | 1992-12-08 | Morton International, Inc. | Pulp bleaching solution |
GB9214041D0 (en) * | 1992-07-02 | 1992-08-12 | Morton Int Inc | Process for de-inking recycled paper pulp |
JPH073684A (ja) * | 1992-12-14 | 1995-01-06 | Hoechst Celanese Corp | リファイナー漂白における二酸化硫黄生成の除去 |
-
2003
- 2003-06-16 DE DE60301446T patent/DE60301446T2/de not_active Expired - Fee Related
- 2003-06-16 EP EP03253792A patent/EP1375735B1/de not_active Expired - Lifetime
- 2003-06-16 CA CA002432459A patent/CA2432459A1/en not_active Abandoned
- 2003-06-16 NO NO20032722A patent/NO20032722L/no not_active Application Discontinuation
- 2003-06-19 US US10/465,433 patent/US7029554B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE60301446D1 (de) | 2005-10-06 |
US20040000380A1 (en) | 2004-01-01 |
NO20032722D0 (no) | 2003-06-16 |
EP1375735A1 (de) | 2004-01-02 |
EP1375735B1 (de) | 2005-08-31 |
CA2432459A1 (en) | 2003-12-28 |
US7029554B2 (en) | 2006-04-18 |
NO20032722L (no) | 2003-12-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |