PT83118A - PROCESS FOR DELIGNIFICATION OF CELLULOSIC MATERIALS - Google Patents

PROCESS FOR DELIGNIFICATION OF CELLULOSIC MATERIALS

Info

Publication number
PT83118A
PT83118A PT83118A PT8311886A PT83118A PT 83118 A PT83118 A PT 83118A PT 83118 A PT83118 A PT 83118A PT 8311886 A PT8311886 A PT 8311886A PT 83118 A PT83118 A PT 83118A
Authority
PT
Portugal
Prior art keywords
cellulosic materials
delignification
treated
conditions
cellulosic
Prior art date
Application number
PT83118A
Other languages
French (fr)
Portuguese (pt)
Other versions
PT83118B (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 PT83118A publication Critical patent/PT83118A/en
Publication of PT83118B publication Critical patent/PT83118B/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)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Materials For Medical Uses (AREA)
  • Dental Preparations (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • External Artificial Organs (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (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 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.
PT83118A 1985-08-05 1986-08-01 PROCESS FOR DISCONTINUING CELLULOSE MATERIALS PT83118B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76272685A 1985-08-05 1985-08-05

Publications (2)

Publication Number Publication Date
PT83118A true PT83118A (en) 1986-09-01
PT83118B PT83118B (en) 1988-10-14

Family

ID=25065883

Family Applications (1)

Application Number Title Priority Date Filing Date
PT83118A PT83118B (en) 1985-08-05 1986-08-01 PROCESS FOR DISCONTINUING CELLULOSE 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
FI85726B (en) 1992-02-14
NO168490C (en) 1992-02-26
AU6054486A (en) 1987-02-12
EP0212329A1 (en) 1987-03-04
PT83118B (en) 1988-10-14
NO168490B (en) 1991-11-18
CA1311093C (en) 1992-12-08
DE3674859D1 (en) 1990-11-15
JPS6297992A (en) 1987-05-07
NZ217002A (en) 1988-11-29
EP0212329B1 (en) 1990-10-10
NO863133D0 (en) 1986-08-04
FI863194A0 (en) 1986-08-05
NO863133L (en) 1987-02-06
FI85726C (en) 1992-05-25
BR8603672A (en) 1987-03-10
FI863194A (en) 1987-02-06
ATE57400T1 (en) 1990-10-15
AU591509B2 (en) 1989-12-07
JPH0742670B2 (en) 1995-05-10
YU45351B (en) 1992-05-28
ES2000385A6 (en) 1988-02-16
YU136986A (en) 1987-10-31

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