DE60301446D1 - Verfahren zur Aufhellung von Pulpe mit Hydrosulfitlösung - Google Patents

Verfahren zur Aufhellung von Pulpe mit Hydrosulfitlösung

Info

Publication number
DE60301446D1
DE60301446D1 DE60301446T DE60301446T DE60301446D1 DE 60301446 D1 DE60301446 D1 DE 60301446D1 DE 60301446 T DE60301446 T DE 60301446T DE 60301446 T DE60301446 T DE 60301446T DE 60301446 D1 DE60301446 D1 DE 60301446D1
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
Application number
DE60301446T
Other languages
English (en)
Other versions
DE60301446T2 (de
Inventor
Goda Rangamannar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rohm and Haas Co
Original Assignee
Rohm and Haas Co
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.)
Filing date
Publication date
Application filed by Rohm and Haas Co filed Critical Rohm and Haas Co
Application granted granted Critical
Publication of DE60301446D1 publication Critical patent/DE60301446D1/de
Publication of DE60301446T2 publication Critical patent/DE60301446T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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)
DE60301446T 2002-06-28 2003-06-16 Verfahren zur Aufhellung von Pulpe mit Hydrosulfitlösung Expired - Fee Related DE60301446T2 (de)

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 true DE60301446D1 (de) 2005-10-06
DE60301446T2 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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60326113D1 (de) * 2002-11-05 2009-03-26 Rohm & Haas 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
US9932709B2 (en) 2013-03-15 2018-04-03 Ecolab Usa Inc. Processes and compositions for brightness improvement in paper production
US20100224333A1 (en) 2009-03-09 2010-09-09 Prasad Duggirala Method and chemical composition to improve efficiency of mechanical pulp

Family Cites Families (12)

* Cited by examiner, † Cited by third party
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
DE69314446T2 (de) * 1992-12-14 1998-03-19 Hoechst Celanese Corp Verhinderung der Schwefeldioxyderzeugung in Refinerbleiche

Also Published As

Publication number Publication date
CA2432459A1 (en) 2003-12-28
DE60301446T2 (de) 2006-06-14
US7029554B2 (en) 2006-04-18
EP1375735B1 (de) 2005-08-31
NO20032722L (no) 2003-12-29
EP1375735A1 (de) 2004-01-02
NO20032722D0 (no) 2003-06-16
US20040000380A1 (en) 2004-01-01

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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