SE8204379L - PROCEDURE FOR PREPARING CELLULOSA WITH LOW SIMILAR CONTENT - Google Patents

PROCEDURE FOR PREPARING CELLULOSA WITH LOW SIMILAR CONTENT

Info

Publication number
SE8204379L
SE8204379L SE8204379A SE8204379A SE8204379L SE 8204379 L SE8204379 L SE 8204379L SE 8204379 A SE8204379 A SE 8204379A SE 8204379 A SE8204379 A SE 8204379A SE 8204379 L SE8204379 L SE 8204379L
Authority
SE
Sweden
Prior art keywords
cellulose
lignin
extraction step
cellulosa
preparing
Prior art date
Application number
SE8204379A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE8204379D0 (en
Inventor
J Lenz
H Kressig
W Peter
Original Assignee
Chemiefaser Lenzing Ag
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 Chemiefaser Lenzing Ag filed Critical Chemiefaser Lenzing Ag
Publication of SE8204379D0 publication Critical patent/SE8204379D0/en
Publication of SE8204379L publication Critical patent/SE8204379L/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
    • D21C3/20—Pulping cellulose-containing materials with organic solvents or in solvent environment
    • 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
    • D21C3/003—Pulping cellulose-containing materials with organic compounds

Abstract

In a method of producing celluloses with low lignin contents, lignin substances are extracted from cellulose-con-taining vegetable material at an elevated temperature and an elevated pressure with aqueous organic solvents and, if desired, the celluloses are bleached. In order to obtain a cellulose by using solvents recoverable by distillation, which cellulose is further processable into an easily filterable viscose, the extraction is carried out in at least two steps. The crude cellulose resulting from the first extraction step is post-extracted in a further extraction step at a temperature lower than in the first extraction step with a medium having a swelling effect on the cellulose and dissolving lignin or lignin particles. The medium may be dimethylformamide, dimethylsulfoxide, phenol, dioxan, methanol/benzene, ethanol/benzene, ethanol/ammonia, phenol/water or mixtures thereof.
SE8204379A 1981-08-06 1982-07-19 PROCEDURE FOR PREPARING CELLULOSA WITH LOW SIMILAR CONTENT SE8204379L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT346581A AT373303B (en) 1981-08-06 1981-08-06 METHOD FOR THE PRODUCTION OF LOW-LEVEL CELLS

Publications (2)

Publication Number Publication Date
SE8204379D0 SE8204379D0 (en) 1982-07-19
SE8204379L true SE8204379L (en) 1983-02-07

Family

ID=3550902

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8204379A SE8204379L (en) 1981-08-06 1982-07-19 PROCEDURE FOR PREPARING CELLULOSA WITH LOW SIMILAR CONTENT

Country Status (6)

Country Link
JP (1) JPS5836289A (en)
AT (1) AT373303B (en)
CA (1) CA1188686A (en)
DE (1) DE3227843A1 (en)
SE (1) SE8204379L (en)
SU (1) SU1296014A3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60107726U (en) * 1983-12-27 1985-07-22 株式会社　金門製作所 Single box water meter
JPS62223385A (en) * 1986-03-18 1987-10-01 株式会社日本紙パルプ研究所 Production of pulp
CA2053035C (en) * 1990-10-12 1997-09-30 Repap Enterprises Inc. Chlorine-free wood pulps and process of making
US5252183A (en) * 1991-09-13 1993-10-12 Abb Lummus Crest Inc. Process of pulping and bleaching fibrous plant material with tert-butyl alcohol and tert-butyl peroxide
FI103588B (en) * 1996-01-19 1999-07-30 Esa Rousu Consulting Oy A process for the production of raw materials for artificial and other fibers from herbaceous plants
CA2326311A1 (en) * 1999-11-19 2001-05-19 Praxair Technology, Inc. Method for applying activated ozone in pulp bleaching

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA238294A (en) * 1924-03-04 William Waggett Frederick Pianoforte action
US3585104A (en) * 1968-07-29 1971-06-15 Theodor N Kleinert Organosolv pulping and recovery process
DE2644155C2 (en) * 1976-09-30 1978-07-27 Theodor N. Dr. Pointe Claire Quebec Kleinert (Kanada) Continuous digestion and recovery process for vegetable fiber raw materials for the production of cellulose in organic solvents
DE2803465A1 (en) * 1978-01-27 1979-08-02 Hans Dipl Ing Knauth Pulp prodn. from plant fibre raw materials - by hydrolysis to extract hemi-cellulose before decomposition with solvent and lignin dissolution
DE2855052A1 (en) * 1978-12-20 1980-06-26 Nicolaus Md Papier METHOD AND DEVICE FOR CONTINUOUSLY UNLOCKING PLANT FIBER MATERIAL

Also Published As

Publication number Publication date
DE3227843C2 (en) 1989-10-05
SU1296014A3 (en) 1987-03-07
AT373303B (en) 1984-01-10
DE3227843A1 (en) 1983-02-24
CA1188686A (en) 1985-06-11
JPS5836289A (en) 1983-03-03
SE8204379D0 (en) 1982-07-19
ATA346581A (en) 1983-05-15

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