AT295997B - A method for the treatment of cellulosic materials - Google Patents

A method for the treatment of cellulosic materials

Info

Publication number
AT295997B
AT295997B AT434170A AT434170A AT295997B AT 295997 B AT295997 B AT 295997B AT 434170 A AT434170 A AT 434170A AT 434170 A AT434170 A AT 434170A AT 295997 B AT295997 B AT 295997B
Authority
AT
Austria
Prior art keywords
treatment
method
cellulosic materials
cellulosic
materials
Prior art date
Application number
AT434170A
Other languages
German (de)
Original Assignee
Mo Och Domsjoe Ab
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
Priority to SE678069A priority Critical patent/SE335053B/xx
Application filed by Mo Och Domsjoe Ab filed Critical Mo Och Domsjoe Ab
Application granted granted Critical
Publication of AT295997B publication Critical patent/AT295997B/en

Links

Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10Bleaching ; Apparatus therefor
    • D21C9/1026Other features in bleaching processes
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10Bleaching ; Apparatus therefor
    • D21C9/1005Pretreatment of the pulp, e.g. degassing the pulp
AT434170A 1969-05-13 1970-05-13 A method for the treatment of cellulosic materials AT295997B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE678069A SE335053B (en) 1969-05-13 1969-05-13

Publications (1)

Publication Number Publication Date
AT295997B true AT295997B (en) 1972-01-25

Family

ID=20269591

Family Applications (1)

Application Number Title Priority Date Filing Date
AT434170A AT295997B (en) 1969-05-13 1970-05-13 A method for the treatment of cellulosic materials

Country Status (7)

Country Link
US (1) US3652385A (en)
AT (1) AT295997B (en)
DE (1) DE2022866C3 (en)
FI (1) FI45575C (en)
FR (1) FR2047420A5 (en)
NO (1) NO128372B (en)
SE (1) SE335053B (en)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE355614B (en) * 1970-05-13 1973-04-30 Mo Och Domsjoe Ab
US4182648A (en) * 1972-02-07 1980-01-08 Sterling Drug Inc. Oxygen pulping process
JPS502641B2 (en) * 1972-03-23 1975-01-28
US4004967A (en) * 1972-06-22 1977-01-25 Billeruds Aktiebolag Bleaching cellulose pulp with oxygen in the presence of formaldehyde
SE373896B (en) * 1972-07-05 1975-02-17 Mo Och Domsjoe Ab
FI58360C (en) * 1974-06-14 1981-01-12 Mo Och Domsjoe Ab Foerfarande Foer delignifiering of lignocellulosahaltigt material having Hjælp of the gas syreinnehaollande and the apparatus Foer utfoerande ratio of foerfarande
US4187141A (en) * 1975-02-24 1980-02-05 Alf Societe Anonyme Method of producing bleached mechanical pulp
US4172006A (en) * 1976-08-26 1979-10-23 Weyerhaeuser Company Method of delignifying wood chips with oxygen by adding cooking liquor under pressure
SE417114B (en) * 1977-07-25 1981-02-23 Mo Och Domsjoe Ab Process for the prevention of scale formation in cellulose factories
US4181516A (en) * 1977-08-22 1980-01-01 Gray Kenneth R Products for correcting iron chlorosis in plants
SE420430B (en) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab Method for bleaching and extraction of lignocellulosic material with peroxide bleach
DE2841013C2 (en) * 1978-09-21 1984-06-07 Degussa Ag, 6000 Frankfurt, De
US4594130A (en) * 1978-11-27 1986-06-10 Chang Pei Ching Pulping of lignocellulose with aqueous alcohol and alkaline earth metal salt catalyst
US4238282A (en) * 1979-07-23 1980-12-09 Nalco Chemical Company Chemical treatments in bleaching stages which increase pulp brightness
SE470065C (en) * 1991-04-30 1995-10-12 Eka Nobel Ab Treatment of chemical pulp with an acid and then a magnesium and calcium compound at chlorine-free bleaching
US6398908B1 (en) 1991-04-30 2002-06-04 Eka Nobel Ab Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound
CA2082557C (en) * 1992-02-24 1997-03-11 Charles W. Hankins Integrated pulping process of waste paper yielding tissue-grade paper fibers
SE502667C2 (en) * 1993-07-12 1995-12-04 Kvaerner Pulping Tech Treatment of the fiber materials with chelating before cooking
SE9401628L (en) * 1994-05-10 1995-11-11 Stora Kopparbergs Bergslags Ab Procedure for oxygen delignification
US6306334B1 (en) 1996-08-23 2001-10-23 The Weyerhaeuser Company Process for melt blowing continuous lyocell fibers
US6797113B2 (en) * 1999-02-24 2004-09-28 Weyerhaeuser Company Use of thinnings and other low specific gravity wood for lyocell pulps method
US6686039B2 (en) 1999-02-24 2004-02-03 Weyerhaeuser Company Use of thinnings and other low specific gravity wood for lyocell pulps
US6210801B1 (en) * 1996-08-23 2001-04-03 Weyerhaeuser Company Lyocell fibers, and compositions for making same
US6471727B2 (en) 1996-08-23 2002-10-29 Weyerhaeuser Company Lyocell fibers, and compositions for making the same
US6686040B2 (en) 1999-02-24 2004-02-03 Weyerhaeuser Company Use of thinnings and other low specific gravity wood for lyocell products
US6605350B1 (en) 1996-08-23 2003-08-12 Weyerhaeuser Company Sawdust alkaline pulp having low average degree of polymerization values and method of producing the same
US6331354B1 (en) 1996-08-23 2001-12-18 Weyerhaeuser Company Alkaline pulp having low average degree of polymerization values and method of producing the same
US6685856B2 (en) 1999-02-24 2004-02-03 Weyerhaeuser Company Use of thinnings and other low specific gravity wood for lyocell products method
BR0008237B1 (en) * 1999-02-15 2010-12-28 substantially sulfur free process for producing chemical pulp from lignocellulosic material and the recovery of chemicals used in said process.
AU6604100A (en) * 2000-02-14 2001-08-20 Kiram Ab Process for oxygen pulping of lignocellulosic material and recovery of pulping chemicals
CA2376528A1 (en) * 1999-06-08 2000-12-14 Nana Barde Bleaching pulp with high-pressure o2
WO2010139589A1 (en) * 2009-06-02 2010-12-09 Akzo Nobel Chemicals International B.V. Process for producing mechanical pulp
IN2014MU01296A (en) * 2014-04-07 2015-10-09 Praj Industries Limited Method for efficient enzymatic hydrolysis of lignocellulosic materials.
EP3356596A1 (en) * 2015-09-30 2018-08-08 Imerys Minerals Limited Methods for bleaching aqueous pulps and compositions for use in these methods

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1987195A (en) * 1934-03-03 1935-01-08 Herman B Kipper Process for the digestion of vegetable growths to produce cellulose
GB576510A (en) * 1944-03-16 1946-04-08 Henry Dreyfus Improvements in or relating to the production of cellulose
GB681994A (en) * 1949-05-31 1952-11-05 British Celanese Improvements in or relating to the production of cellulose
US2862784A (en) * 1955-03-04 1958-12-02 Virginia Smelting Company Oxidative-reductive multi-stage bleaching of ground wood pulp
US2811518A (en) * 1955-06-07 1957-10-29 Rayonier Inc Alkaline refining of wood pulp
US3023140A (en) * 1958-11-24 1962-02-27 Bauer Bros Co Pulp bleaching
US3088861A (en) * 1960-08-03 1963-05-07 Weyerhaeuser Co Method of manufacturing chemical pulp from lignocellulose material
US3069309A (en) * 1961-02-01 1962-12-18 Du Pont Pulp bleaching
US3251731A (en) * 1963-02-11 1966-05-17 Andrew J Gard Bleaching of wood pulp with a sequestering agent and hydrogen peroxide
FR1387853A (en) * 1963-09-19 1965-02-05 Air Liquide Delignification and chemical cellulose pulp and semi-chemical bleaching
US3382149A (en) * 1964-10-29 1968-05-07 Du Pont Bleaching of hardwood sulfite pulp with hydrogen peroxide, including pretreatment with alkali

Also Published As

Publication number Publication date
DE2022866A1 (en) 1970-12-23
FI45575C (en) 1972-07-10
NO128372B (en) 1973-11-05
US3652385A (en) 1972-03-28
FI45575B (en) 1972-04-04
FR2047420A5 (en) 1971-03-12
DE2022866B2 (en) 1974-03-28
DE2022866C3 (en) 1974-11-14
SE335053B (en) 1971-05-10

Similar Documents

Publication Publication Date Title
CH507249A (en) A process for the preparation of 2-bromo-a-ergocryptine
CH532571A (en) A process for the preparation of 3-Amidopyrrolidinen
DE1442368A1 (en) A method for the treatment of impurity-containing liquids in dissolved form
AT282542B (en) A method for the treatment of fiber material
DE1941491A1 (en) A process for the production of substances faserverstaerkten zusammengestetzten
AT290415B (en) A process for treating waste water
CH527163A (en) A process for the preparation of 2-Hydroxypolyfluoralkylaminen
AT302533B (en) A process for the preparation of coated Acetylsalicylsäureteilchen
CH503803A (en) Process for treating the inner surfaces of recesses
AT294065B (en) A process for the preparation of bis-maleimides
DE1959149A1 (en) Process for treating keratin fibers
DE1956512A1 (en) A process for the preparation of polyamide-imides
CH556336A (en) A process for the preparation of 1-acylated 3-arylpyrrolidinen and 1-acylated 3-arylpyrrolinen.
CH558332A (en) A process for the preparation of N- (hydroxyhydrocarbyl) n-alkylaminocarboxylaten and -iminodicarboxylaten.
DE2000986A1 (en) A process for treating waste water
DE2450730B2 (en) A process for leckueberwachung of fluessigkeitsleitungen
DE2361119A1 (en) A method for treatment of wood
DE2358124A1 (en) A process for the treatment of surfaces to prevent condensation
AT291254B (en) A process for the preparation of 3-amino-4jod-5-methyllisoxazolen
DE1954267A1 (en) A method of treating cellulose-containing materials
DE2260049A1 (en) A method for the treatment of fiber and filament
DE2060484B2 (en) A process for the hydrotreating of heavy kohlenwasserstoffoel
AT306930B (en) A process for the preparation of 1-glycosyl-5-azacytosinen
DE2032189B2 (en) A method for the treatment of wastewater
DE2022866A1 (en) A method for treating material cellulosic

Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee