NO20032722L - Fremgangsmåte til klaring av pulp med hydrosulfittl degree sning - Google Patents

Fremgangsmåte til klaring av pulp med hydrosulfittl degree sning

Info

Publication number: NO20032722L
Authority: NO; Norway
Prior art keywords: hydrosulfite; clearing; pulp; degradation; hydrosulfite degradation
Prior art date: 2002-06-28

Application number

NO20032722A

Other languages

English (en)

Other versions

NO20032722D0 (no

Inventor

Rangamannar Goda

Original Assignee

Rohm & Haas

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.)

2002-06-28

Filing date

2003-06-16

Publication date

2003-12-29

2003-06-16 Application filed by Rohm & Haas filed Critical Rohm & Haas

2003-06-16 Publication of NO20032722D0 publication Critical patent/NO20032722D0/no

2003-12-29 Publication of NO20032722L publication Critical patent/NO20032722L/no

Links

230000015556 catabolic process Effects 0.000 title 1
238000006731 degradation reaction Methods 0.000 title 1
GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 title 1
238000000034 method Methods 0.000 title 1

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)

NO20032722A 2002-06-28 2003-06-16 Fremgangsmåte til klaring av pulp med hydrosulfittl degree sning NO20032722L (no)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US39274502P	2002-06-28	2002-06-28

Publications (2)

Publication Number	Publication Date
NO20032722D0 NO20032722D0 (no)	2003-06-16
NO20032722L true NO20032722L (no)	2003-12-29

Family

ID=29584654

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NO20032722A NO20032722L (no)	2002-06-28	2003-06-16	Fremgangsmåte til klaring av pulp med hydrosulfittl degree sning

Country Status (5)

Country	Link
US (1)	US7029554B2 (no)
EP (1)	EP1375735B1 (no)
CA (1)	CA2432459A1 (no)
DE (1)	DE60301446T2 (no)
NO (1)	NO20032722L (no)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1418269B1 (en) *	2002-11-05	2009-02-11	Rohm And Haas Company	Method for brightening virgin mechanical pulp
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
ATE159063T1 (de) *	1992-12-14	1997-10-15	Hoechst Celanese Corp	Verhinderung der schwefeldioxyderzeugung in refinerbleiche

2003
- 2003-06-16 DE DE60301446T patent/DE60301446T2/de not_active Expired - Fee Related
- 2003-06-16 CA CA002432459A patent/CA2432459A1/en not_active Abandoned
- 2003-06-16 NO NO20032722A patent/NO20032722L/no not_active Application Discontinuation
- 2003-06-16 EP EP03253792A patent/EP1375735B1/en not_active Expired - Lifetime
- 2003-06-19 US US10/465,433 patent/US7029554B2/en not_active Expired - Fee Related

Also Published As

Publication number	Publication date
NO20032722D0 (no)	2003-06-16
US20040000380A1 (en)	2004-01-01
EP1375735B1 (en)	2005-08-31
EP1375735A1 (en)	2004-01-02
DE60301446D1 (de)	2005-10-06
DE60301446T2 (de)	2006-06-14
US7029554B2 (en)	2006-04-18
CA2432459A1 (en)	2003-12-28

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Legal Events

Date	Code	Title	Description
2008-01-21	FC2A	Withdrawal, rejection or dismissal of laid open patent application