FI863194A - FOERFARANDE FOER DELIGNIFIERING AV CELLULOSAMATERIAL. - Google Patents

FOERFARANDE FOER DELIGNIFIERING AV CELLULOSAMATERIAL. Download PDF

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Publication number
FI863194A
FI863194A FI863194A FI863194A FI863194A FI 863194 A FI863194 A FI 863194A FI 863194 A FI863194 A FI 863194A FI 863194 A FI863194 A FI 863194A FI 863194 A FI863194 A FI 863194A
Authority
FI
Finland
Prior art keywords
cellulosic materials
cellulosamaterial
foerfarande foer
delignifiering
treated
Prior art date
Application number
FI863194A
Other languages
Finnish (fi)
Other versions
FI863194A0 (en
FI85726C (en
FI85726B (en
Inventor
Josef S Gratzl
Original Assignee
Interox Sa
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 Interox Sa filed Critical Interox Sa
Publication of FI863194A0 publication Critical patent/FI863194A0/en
Publication of FI863194A publication Critical patent/FI863194A/en
Application granted granted Critical
Publication of FI85726B publication Critical patent/FI85726B/en
Publication of FI85726C publication Critical patent/FI85726C/en

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
    • D21C3/26—Multistage processes

Landscapes

  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Dental Preparations (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Materials For Medical Uses (AREA)
  • External Artificial Organs (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)

Abstract

1. Process for the delignification of cellulosic materials characterized in that in a first step the cellulosic materials are treated with an acid under regulated conditions to effect a decontamination of the cellulosic materials of the metals which they contain, in a second step the cellulosic materials of the first step are treated with hydrogen peroxyde under alcaline conditions and in a third step the cellulosic materials of the second step are boiled in the presence of soda.
FI863194A 1985-08-05 1986-08-05 FOERFARANDE FOER DELIGNIFIERING AV CELLULOSAMATERIAL. FI85726C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US76272685A 1985-08-05 1985-08-05
US76272685 1985-08-05

Publications (4)

Publication Number Publication Date
FI863194A0 FI863194A0 (en) 1986-08-05
FI863194A true FI863194A (en) 1987-02-06
FI85726B FI85726B (en) 1992-02-14
FI85726C FI85726C (en) 1992-05-25

Family

ID=25065883

Family Applications (1)

Application Number Title Priority Date Filing Date
FI863194A FI85726C (en) 1985-08-05 1986-08-05 FOERFARANDE FOER DELIGNIFIERING AV CELLULOSAMATERIAL.

Country Status (13)

Country Link
EP (1) EP0212329B1 (en)
JP (1) JPH0742670B2 (en)
AT (1) ATE57400T1 (en)
AU (1) AU591509B2 (en)
BR (1) BR8603672A (en)
CA (1) CA1311093C (en)
DE (1) DE3674859D1 (en)
ES (1) ES2000385A6 (en)
FI (1) FI85726C (en)
NO (1) NO168490C (en)
NZ (1) NZ217002A (en)
PT (1) PT83118B (en)
YU (1) YU45351B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN167959B (en) * 1985-08-05 1991-01-12 Interox

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1474276A (en) * 1965-03-19 1967-03-24 Electro Chimie Soc D Improvements in the manufacture of pulp
SE373896B (en) * 1972-07-05 1975-02-17 Mo Och Domsjoe Ab
SE380298B (en) * 1974-03-14 1975-11-03 Mo PROCEDURE FOR DELIGNIFICATION BY ACID-ALKALI TREATMENT OF LIGNOCELLUOSA-CONTAINING MATERIAL
SE7612248L (en) * 1976-11-03 1978-05-04 Mo Och Domsjoe Ab BOILING OF LIGNOCELLULOSE-MATERIALS
SU821614A1 (en) * 1979-06-19 1981-04-15 Белорусский Технологический Институт Им.C.M.Кирова Method of obtaining pulp-containing semiproduct
IN167959B (en) * 1985-08-05 1991-01-12 Interox

Also Published As

Publication number Publication date
NO863133D0 (en) 1986-08-04
DE3674859D1 (en) 1990-11-15
CA1311093C (en) 1992-12-08
FI863194A0 (en) 1986-08-05
EP0212329B1 (en) 1990-10-10
BR8603672A (en) 1987-03-10
PT83118A (en) 1986-09-01
ES2000385A6 (en) 1988-02-16
AU591509B2 (en) 1989-12-07
NO168490C (en) 1992-02-26
JPH0742670B2 (en) 1995-05-10
FI85726C (en) 1992-05-25
EP0212329A1 (en) 1987-03-04
ATE57400T1 (en) 1990-10-15
FI85726B (en) 1992-02-14
NZ217002A (en) 1988-11-29
NO863133L (en) 1987-02-06
JPS6297992A (en) 1987-05-07
YU136986A (en) 1987-10-31
AU6054486A (en) 1987-02-12
YU45351B (en) 1992-05-28
NO168490B (en) 1991-11-18
PT83118B (en) 1988-10-14

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: INTEROX (SOCIETE ANONYME)