PT83117B - PROCESS FOR DISCONTINUING CELLULOSE MATERIALS - Google Patents

PROCESS FOR DISCONTINUING CELLULOSE MATERIALS

Info

Publication number
PT83117B
PT83117B PT83117A PT8311786A PT83117B PT 83117 B PT83117 B PT 83117B PT 83117 A PT83117 A PT 83117A PT 8311786 A PT8311786 A PT 8311786A PT 83117 B PT83117 B PT 83117B
Authority
PT
Portugal
Prior art keywords
discontinuing
cellulosic materials
cellulose materials
treated
cellulosic
Prior art date
Application number
PT83117A
Other languages
Portuguese (pt)
Other versions
PT83117A (en
Inventor
Josef S 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 PT83117A publication Critical patent/PT83117A/en
Publication of PT83117B publication Critical patent/PT83117B/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)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Organic Insulating Materials (AREA)
  • Dental Preparations (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)
  • Detergent Compositions (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Cleaning Or Drying Semiconductors (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.
PT83117A 1985-08-05 1986-08-01 PROCESS FOR DISCONTINUING CELLULOSE MATERIALS PT83117B (en)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
PT83117A PT83117A (en) 1986-09-01
PT83117B true PT83117B (en) 1988-10-14

Family

ID=25065878

Family Applications (1)

Application Number Title Priority Date Filing Date
PT83117A PT83117B (en) 1985-08-05 1986-08-01 PROCESS FOR DISCONTINUING CELLULOSE 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
EP0212329B1 (en) * 1985-08-05 1990-10-10 INTEROX Société Anonyme Process for the delignification of cellulosic materials
FI122654B (en) * 1997-12-08 2012-05-15 Ovivo Luxembourg Sarl Process for making paper cellulose pulp
EP2158357B1 (en) * 2007-05-23 2013-11-27 Alberta Innovates - Technology Futures 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
EP0212329B1 (en) * 1985-08-05 1990-10-10 INTEROX Société Anonyme Process for the delignification of cellulosic materials

Also Published As

Publication number Publication date
FI85725B (en) 1992-02-14
NO863132D0 (en) 1986-08-04
BR8603671A (en) 1987-03-10
FI863193A0 (en) 1986-08-05
IN167959B (en) 1991-01-12
YU45352B (en) 1992-05-28
NZ217001A (en) 1989-01-27
FI85725C (en) 1992-05-25
AU6054386A (en) 1987-02-12
FI863193A (en) 1987-02-06
PT83117A (en) 1986-09-01
JPS6297991A (en) 1987-05-07
ES2000831A6 (en) 1988-03-16
YU137086A (en) 1987-10-31
AU591508B2 (en) 1989-12-07
CA1282911C (en) 1991-04-16
DE3674866D1 (en) 1990-11-15
EP0213376A1 (en) 1987-03-11
EP0213376B1 (en) 1990-10-10
NO168375C (en) 1992-02-12
ATE57401T1 (en) 1990-10-15
NO168375B (en) 1991-11-04
JPH0742669B2 (en) 1995-05-10
NO863132L (en) 1987-02-06

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Legal Events

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Effective date: 20020930