ATE57400T1 - PROCESSES FOR DELIGNIFICATION OF CELLULOSIC MATERIALS. - Google Patents

PROCESSES FOR DELIGNIFICATION OF CELLULOSIC MATERIALS.

Info

Publication number
ATE57400T1
ATE57400T1 AT86110248T AT86110248T ATE57400T1 AT E57400 T1 ATE57400 T1 AT E57400T1 AT 86110248 T AT86110248 T AT 86110248T AT 86110248 T AT86110248 T AT 86110248T AT E57400 T1 ATE57400 T1 AT E57400T1
Authority
AT
Austria
Prior art keywords
cellulosic materials
delignification
processes
treated
conditions
Prior art date
Application number
AT86110248T
Other languages
German (de)
Inventor
Josef S Dr 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
Application granted granted Critical
Publication of ATE57400T1 publication Critical patent/ATE57400T1/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)
  • Materials For Medical Uses (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Dental Preparations (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • External Artificial Organs (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Agricultural Chemicals And Associated Chemicals (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.
AT86110248T 1985-08-05 1986-07-25 PROCESSES FOR DELIGNIFICATION OF CELLULOSIC MATERIALS. ATE57400T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US76272685A 1985-08-05 1985-08-05
EP86110248A EP0212329B1 (en) 1985-08-05 1986-07-25 Process for the delignification of cellulosic materials

Publications (1)

Publication Number Publication Date
ATE57400T1 true ATE57400T1 (en) 1990-10-15

Family

ID=25065883

Family Applications (1)

Application Number Title Priority Date Filing Date
AT86110248T ATE57400T1 (en) 1985-08-05 1986-07-25 PROCESSES FOR DELIGNIFICATION OF CELLULOSIC MATERIALS.

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
EP0212329A1 (en) 1987-03-04
FI85726C (en) 1992-05-25
PT83118A (en) 1986-09-01
FI863194A (en) 1987-02-06
PT83118B (en) 1988-10-14
NO863133D0 (en) 1986-08-04
ES2000385A6 (en) 1988-02-16
NO168490C (en) 1992-02-26
AU6054486A (en) 1987-02-12
AU591509B2 (en) 1989-12-07
YU45351B (en) 1992-05-28
CA1311093C (en) 1992-12-08
FI863194A0 (en) 1986-08-05
NO168490B (en) 1991-11-18
NZ217002A (en) 1988-11-29
JPS6297992A (en) 1987-05-07
YU136986A (en) 1987-10-31
BR8603672A (en) 1987-03-10
EP0212329B1 (en) 1990-10-10
FI85726B (en) 1992-02-14
NO863133L (en) 1987-02-06
JPH0742670B2 (en) 1995-05-10
DE3674859D1 (en) 1990-11-15

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee