ATE57401T1 - PROCESSES FOR DELIGNIFICATION OF CELLULOSIC MATERIALS. - Google Patents

PROCESSES FOR DELIGNIFICATION OF CELLULOSIC MATERIALS.

Info

Publication number
ATE57401T1
ATE57401T1 AT86110249T AT86110249T ATE57401T1 AT E57401 T1 ATE57401 T1 AT E57401T1 AT 86110249 T AT86110249 T AT 86110249T AT 86110249 T AT86110249 T AT 86110249T AT E57401 T1 ATE57401 T1 AT E57401T1
Authority
AT
Austria
Prior art keywords
cellulosic materials
delignification
processes
cellulosic
treated
Prior art date
Application number
AT86110249T
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 ATE57401T1 publication Critical patent/ATE57401T1/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)
  • External Artificial Organs (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Materials For Medical Uses (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Dental Preparations (AREA)
  • Organic Insulating Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Detergent Compositions (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Cleaning Or Drying Semiconductors (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (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 material 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 sulphite or sulphate.
AT86110249T 1985-08-05 1986-07-25 PROCESSES FOR DELIGNIFICATION OF CELLULOSIC MATERIALS. ATE57401T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US76272485A 1985-08-05 1985-08-05
EP86110249A EP0213376B1 (en) 1985-08-05 1986-07-25 Process for the delignification of cellulosic materials

Publications (1)

Publication Number Publication Date
ATE57401T1 true ATE57401T1 (en) 1990-10-15

Family

ID=25065878

Family Applications (1)

Application Number Title Priority Date Filing Date
AT86110249T ATE57401T1 (en) 1985-08-05 1986-07-25 PROCESSES FOR DELIGNIFICATION OF CELLULOSIC MATERIALS.

Country Status (14)

Country Link
EP (1) EP0213376B1 (en)
JP (1) JPH0742669B2 (en)
AT (1) ATE57401T1 (en)
AU (1) AU591508B2 (en)
BR (1) BR8603671A (en)
CA (1) CA1282911C (en)
DE (1) DE3674866D1 (en)
ES (1) ES2000831A6 (en)
FI (1) FI85725C (en)
IN (1) IN167959B (en)
NO (1) NO168375C (en)
NZ (1) NZ217001A (en)
PT (1) PT83117B (en)
YU (1) YU45352B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU591509B2 (en) * 1985-08-05 1989-12-07 Interox Societe Anonyme Process for the delignification of cellulosic substances
FI122654B (en) * 1997-12-08 2012-05-15 Ovivo Luxembourg Sarl Process for making paper cellulose pulp
CA2687581C (en) * 2007-05-23 2015-04-21 Alberta Research Council Inc. Method to remove hemicellulose from cellulosic fibres using a solution of ammonia and hydrogen peroxide

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE873649C (en) * 1944-08-25 1953-04-16 Degussa Process for the production of unbleached cellulose with a high white content
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
US4486267A (en) * 1983-11-14 1984-12-04 Mead Corporation Chemithermomechanical pulping process employing separate alkali and sulfite treatments
AU591509B2 (en) * 1985-08-05 1989-12-07 Interox Societe Anonyme Process for the delignification of cellulosic substances

Also Published As

Publication number Publication date
FI863193A0 (en) 1986-08-05
YU137086A (en) 1987-10-31
JPH0742669B2 (en) 1995-05-10
NO863132D0 (en) 1986-08-04
EP0213376A1 (en) 1987-03-11
BR8603671A (en) 1987-03-10
IN167959B (en) 1991-01-12
AU591508B2 (en) 1989-12-07
NO168375C (en) 1992-02-12
FI85725C (en) 1992-05-25
FI85725B (en) 1992-02-14
NO863132L (en) 1987-02-06
FI863193A (en) 1987-02-06
NO168375B (en) 1991-11-04
CA1282911C (en) 1991-04-16
AU6054386A (en) 1987-02-12
PT83117A (en) 1986-09-01
DE3674866D1 (en) 1990-11-15
NZ217001A (en) 1989-01-27
PT83117B (en) 1988-10-14
EP0213376B1 (en) 1990-10-10
JPS6297991A (en) 1987-05-07
ES2000831A6 (en) 1988-03-16
YU45352B (en) 1992-05-28

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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