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)
  • External Artificial Organs (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Materials For Medical Uses (AREA)
  • Dental Preparations (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Chemical Or Physical Treatment Of Fibers (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 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
YU45351B (en) 1992-05-28
NZ217002A (en) 1988-11-29
JPH0742670B2 (en) 1995-05-10
FI863194A0 (en) 1986-08-05
EP0212329B1 (en) 1990-10-10
PT83118B (en) 1988-10-14
NO863133L (en) 1987-02-06
ATE57400T1 (en) 1990-10-15
YU136986A (en) 1987-10-31
FI863194A (en) 1987-02-06
CA1311093C (en) 1992-12-08
BR8603672A (en) 1987-03-10
NO168490B (en) 1991-11-18
NO863133D0 (en) 1986-08-04
FI85726C (en) 1992-05-25
NO168490C (en) 1992-02-26
DE3674859D1 (en) 1990-11-15
EP0212329A1 (en) 1987-03-04
AU6054486A (en) 1987-02-12
ES2000385A6 (en) 1988-02-16
JPS6297992A (en) 1987-05-07
FI85726B (en) 1992-02-14
AU591509B2 (en) 1989-12-07

Similar Documents

Publication Publication Date Title
FR2552125B1 (en) PROCESS FOR THE TREATMENT OF CELLULOSIC MATERIALS BY OXIDIZING AGENTS
FI884267A0 (en) A method for treating pulps with ozone and a reactor for applying this method
HK19595A (en) Fluoxetine useful for the treatment of diabetes
FR2604197B1 (en) PROCESS FOR BLEACHING LIGNOCELLULOSIC MATERIALS.
DE3672577D1 (en) METHOD FOR THE BLEACHING AND DELIGNIFICATION OF CELLULAR-BASED PRODUCTS.
FR2557894B1 (en) PROCESS FOR THE TREATMENT OF PAPER PULP WITH A FIBRILLATION ENZYMATIC SOLUTION AND PULPES THUS PROCESSED.
PT83118A (en) PROCESS FOR DELIGNIFICATION OF CELLULOSIC MATERIALS
PT83117A (en) PROCESS FOR DELIGNIFICATION OF CELLULOSIC MATERIALS
ATE23376T1 (en) PROCESS FOR BLEACHING PAPER RAW MATERIALS.
ES8802335A1 (en) Process for improving the mechanical properties of a chemical or semi-chemical bagasse paper pulp.
FR2663348B1 (en) PROCESS FOR IMPROVING THE BLEACHING OF CHEMICAL PAPER PULP USING OZONE AND PROCESSED PULP.
FI854148A0 (en) FOERFARANDE FOER BEHANDLING AV PAPPERSMASSOR FOER BLEKNING AV DESAMMA.
LT2524B (en) THE PROCESS FOR THE PROCESSING OF THE HEAVY HYDROGEN OIL PRODUCT USING SULPHITE COXY \ t

Legal Events

Date Code Title Description
MM3A Annulment or lapse

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 20020930