IN167959B - - Google Patents

Info

Publication number
IN167959B
IN167959B IN647/DEL/86A IN647DE1986A IN167959B IN 167959 B IN167959 B IN 167959B IN 647DE1986 A IN647DE1986 A IN 647DE1986A IN 167959 B IN167959 B IN 167959B
Authority
IN
India
Prior art keywords
cellulosic materials
treated
cellulosic
conditions
delignification
Prior art date
Application number
IN647/DEL/86A
Inventor
Josef Stefan Gratzl
Original Assignee
Interox
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 filed Critical Interox
Publication of IN167959B publication Critical patent/IN167959B/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)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Organic Insulating Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • External Artificial Organs (AREA)
  • Dental Preparations (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Materials For Medical Uses (AREA)
  • Cleaning Or Drying Semiconductors (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (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)

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.
IN647/DEL/86A 1985-08-05 1986-07-18 IN167959B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76272485A 1985-08-05 1985-08-05

Publications (1)

Publication Number Publication Date
IN167959B true IN167959B (en) 1991-01-12

Family

ID=25065878

Family Applications (1)

Application Number Title Priority Date Filing Date
IN647/DEL/86A IN167959B (en) 1985-08-05 1986-07-18

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
ATE57400T1 (en) * 1985-08-05 1990-10-15 Interox Sa PROCESSES FOR DELIGNIFICATION OF CELLULOSIC MATERIALS.
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
ATE57400T1 (en) * 1985-08-05 1990-10-15 Interox Sa PROCESSES FOR DELIGNIFICATION OF CELLULOSIC MATERIALS.

Also Published As

Publication number Publication date
BR8603671A (en) 1987-03-10
DE3674866D1 (en) 1990-11-15
AU6054386A (en) 1987-02-12
JPH0742669B2 (en) 1995-05-10
NZ217001A (en) 1989-01-27
PT83117B (en) 1988-10-14
FI85725B (en) 1992-02-14
YU137086A (en) 1987-10-31
NO863132D0 (en) 1986-08-04
NO168375C (en) 1992-02-12
CA1282911C (en) 1991-04-16
NO168375B (en) 1991-11-04
NO863132L (en) 1987-02-06
EP0213376B1 (en) 1990-10-10
JPS6297991A (en) 1987-05-07
EP0213376A1 (en) 1987-03-11
YU45352B (en) 1992-05-28
AU591508B2 (en) 1989-12-07
FI863193A0 (en) 1986-08-05
FI863193A (en) 1987-02-06
ES2000831A6 (en) 1988-03-16
ATE57401T1 (en) 1990-10-15
FI85725C (en) 1992-05-25
PT83117A (en) 1986-09-01

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IN167959B (en)
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