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FI812935L - Foerfarande foer delignifiering av lignocellulosamaterial - Google Patents

Foerfarande foer delignifiering av lignocellulosamaterial

Info

Publication number
FI812935L
FI812935L FI812935A FI812935A FI812935L FI 812935 L FI812935 L FI 812935L FI 812935 A FI812935 A FI 812935A FI 812935 A FI812935 A FI 812935A FI 812935 L FI812935 L FI 812935L
Authority
FI
Finland
Prior art keywords
lignocellulosamaterial
foerfarande foer
delignifiering
foer delignifiering
foerfarande
Prior art date
Application number
FI812935A
Other languages
English (en)
Other versions
FI69654C (fi
FI69654B (fi
Inventor
Dieter Werthemann
Original Assignee
Ciba Geigy Ag
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 Ciba Geigy Ag filed Critical Ciba Geigy Ag
Publication of FI812935L publication Critical patent/FI812935L/fi
Application granted granted Critical
Publication of FI69654B publication Critical patent/FI69654B/fi
Publication of FI69654C publication Critical patent/FI69654C/fi

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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/222—Use of compounds accelerating the pulping processes
FI812935A 1980-09-25 1981-09-21 Foerfarande foer delignifiering av lignocellulosamaterial FI69654C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH718380 1980-09-25
CH718380 1980-09-25

Publications (3)

Publication Number Publication Date
FI812935L true FI812935L (fi) 1982-03-26
FI69654B FI69654B (fi) 1985-11-29
FI69654C FI69654C (fi) 1986-03-10

Family

ID=4321202

Family Applications (1)

Application Number Title Priority Date Filing Date
FI812935A FI69654C (fi) 1980-09-25 1981-09-21 Foerfarande foer delignifiering av lignocellulosamaterial

Country Status (9)

Country Link
EP (1) EP0049221B1 (fi)
JP (1) JPS5789691A (fi)
AU (1) AU547453B2 (fi)
BR (1) BR8106122A (fi)
CA (1) CA1174810A (fi)
DE (1) DE3161711D1 (fi)
FI (1) FI69654C (fi)
NO (1) NO813257L (fi)
ZA (1) ZA816637B (fi)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6702921B2 (en) * 2001-05-01 2004-03-09 Ondeo Nalco Company Methods to enhance pulp bleaching and delignification using an organic sulfide chelating agent
US7351764B2 (en) 2004-03-31 2008-04-01 Nalco Company Methods to enhance brightness of pulp and optimize use of bleaching chemicals

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ185937A (en) * 1976-12-13 1979-10-25 Australian Paper Manufacturers Delignification of lignocellulosic material with amine based liquor containing quinones or hydroqinones
US4248663A (en) * 1978-07-05 1981-02-03 Pulp And Paper Research Institute Of Canada Pulping with an alkaline liquor containing a cyclic keto compound and an amino compound

Also Published As

Publication number Publication date
BR8106122A (pt) 1982-06-15
NO813257L (no) 1982-03-26
AU547453B2 (en) 1985-10-24
EP0049221A1 (de) 1982-04-07
CA1174810A (en) 1984-09-25
DE3161711D1 (en) 1984-01-26
JPS5789691A (en) 1982-06-04
ZA816637B (en) 1982-09-29
FI69654C (fi) 1986-03-10
AU7564281A (en) 1982-04-01
EP0049221B1 (de) 1983-12-21
FI69654B (fi) 1985-11-29

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: CIBA-GEIGY AG