ES2000831A6 - Process for the delignification of cellulosic materials. - Google Patents

Process for the delignification of cellulosic materials.

Info

Publication number
ES2000831A6
ES2000831A6 ES868600839A ES8600839A ES2000831A6 ES 2000831 A6 ES2000831 A6 ES 2000831A6 ES 868600839 A ES868600839 A ES 868600839A ES 8600839 A ES8600839 A ES 8600839A ES 2000831 A6 ES2000831 A6 ES 2000831A6
Authority
ES
Spain
Prior art keywords
cellulosic materials
delignification
cellulosic
treated
conditions
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
ES868600839A
Other languages
Spanish (es)
Inventor
Josef S Gratzl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Solvay Chimie SA
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 ES2000831A6 publication Critical patent/ES2000831A6/en
Expired legal-status Critical Current

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)
  • Materials For Medical Uses (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Dental Preparations (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Organic Insulating Materials (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Cleaning Or Drying Semiconductors (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Detergent Compositions (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • External Artificial Organs (AREA)
  • Ultra Sonic Daignosis Equipment (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.
ES868600839A 1985-08-05 1986-08-04 Process for the delignification of cellulosic materials. Expired ES2000831A6 (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
ES2000831A6 true ES2000831A6 (en) 1988-03-16

Family

ID=25065878

Family Applications (1)

Application Number Title Priority Date Filing Date
ES868600839A Expired ES2000831A6 (en) 1985-08-05 1986-08-04 Process for the 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
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
CN101688361B (en) * 2007-05-23 2013-05-15 艾伯塔创新-未来技术公司 Process for removing hemicellulose from cellulosic fibers 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
YU137086A (en) 1987-10-31
FI863193A0 (en) 1986-08-05
ATE57401T1 (en) 1990-10-15
NO863132D0 (en) 1986-08-04
PT83117B (en) 1988-10-14
YU45352B (en) 1992-05-28
EP0213376A1 (en) 1987-03-11
EP0213376B1 (en) 1990-10-10
NO168375B (en) 1991-11-04
NO168375C (en) 1992-02-12
NO863132L (en) 1987-02-06
DE3674866D1 (en) 1990-11-15
JPS6297991A (en) 1987-05-07
FI863193L (en) 1987-02-06
AU6054386A (en) 1987-02-12
BR8603671A (en) 1987-03-10
AU591508B2 (en) 1989-12-07
PT83117A (en) 1986-09-01
CA1282911C (en) 1991-04-16
IN167959B (en) 1991-01-12
JPH0742669B2 (en) 1995-05-10
FI85725B (en) 1992-02-14
FI85725C (en) 1992-05-25
NZ217001A (en) 1989-01-27

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