SE335053B - - Google Patents

Info

Publication number
SE335053B
SE335053B SE06780/69A SE678069A SE335053B SE 335053 B SE335053 B SE 335053B SE 06780/69 A SE06780/69 A SE 06780/69A SE 678069 A SE678069 A SE 678069A SE 335053 B SE335053 B SE 335053B
Authority
SE
Sweden
Prior art keywords
cellulose
hemicellulose
oxygen
magnesium
dissolution
Prior art date
Application number
SE06780/69A
Other languages
English (en)
Inventor
H Samuelson
S Noreus
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
Application filed by Mo Och Domsjoe Ab filed Critical Mo Och Domsjoe Ab
Priority to SE06780/69A priority Critical patent/SE335053B/xx
Priority to FI700982A priority patent/FI45575C/fi
Priority to FR7016642A priority patent/FR2047420A5/fr
Priority to NO01766/70A priority patent/NO128372B/no
Priority to DE2022866A priority patent/DE2022866C3/de
Priority to US36670A priority patent/US3652385A/en
Priority to AT434170A priority patent/AT295997B/de
Publication of SE335053B publication Critical patent/SE335053B/xx

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
    • D21C9/00—After-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
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1026—Other features in bleaching processes
    • 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
    • D21C9/00—After-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
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
SE06780/69A 1969-05-13 1969-05-13 SE335053B (zh)

Priority Applications (7)

Application Number Priority Date Filing Date Title
SE06780/69A SE335053B (zh) 1969-05-13 1969-05-13
FI700982A FI45575C (fi) 1969-05-13 1970-04-08 Selluloosapitoisen aineen käsittelymenetelmä.
FR7016642A FR2047420A5 (zh) 1969-05-13 1970-05-06
NO01766/70A NO128372B (zh) 1969-05-13 1970-05-09
DE2022866A DE2022866C3 (de) 1969-05-13 1970-05-11 Verfahren zum Bleichen von zellulosehaltigem Material
US36670A US3652385A (en) 1969-05-13 1970-05-12 Process for treating cellulosic materials from which metal ions have been removed with alkali and oxygen in the presence of complex magnesium salts
AT434170A AT295997B (de) 1969-05-13 1970-05-13 Verfahren zur Behandlung von Zellulosematerialien

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE06780/69A SE335053B (zh) 1969-05-13 1969-05-13

Publications (1)

Publication Number Publication Date
SE335053B true SE335053B (zh) 1971-05-10

Family

ID=20269591

Family Applications (1)

Application Number Title Priority Date Filing Date
SE06780/69A SE335053B (zh) 1969-05-13 1969-05-13

Country Status (7)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997017489A1 (en) * 1994-05-10 1997-05-15 Stora Kopparbergs Bergslags Ab Process for oxygen delignification

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE355614B (zh) * 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 (zh) * 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 (zh) * 1972-07-05 1975-02-17 Mo Och Domsjoe Ab
GB1505529A (en) * 1974-06-14 1978-03-30 Mo Och Domsjoe Ab Method for the oxygen-gas delignification of lignocellulosic material and apparatus for carrying out the method
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 (sv) * 1977-07-25 1981-02-23 Mo Och Domsjoe Ab Forfarande for forebyggande av inkrustbildning i cellulosafabriker
US4181516A (en) * 1977-08-22 1980-01-01 Gray Kenneth R Products for correcting iron chlorosis in plants
SE420430B (sv) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab Forfarande for blekning och extraktion av lignocellulosahaltig material med peroxidhaltiga blekmedel
DE2841013C2 (de) * 1978-09-21 1984-06-07 Degussa Ag, 6000 Frankfurt Verfahren zur Vollbleiche von Zellstoff
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
US6398908B1 (en) 1991-04-30 2002-06-04 Eka Nobel Ab Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound
SE470065C (sv) * 1991-04-30 1996-01-15 Eka Nobel Ab Behandling av kemisk massa med en syra och därefter en magnesium- och kalciumförening vid klorfri blekning
CA2082557C (en) * 1992-02-24 1997-03-11 Charles W. Hankins Integrated pulping process of waste paper yielding tissue-grade paper fibers
SE502667C2 (sv) * 1993-07-12 1995-12-04 Kvaerner Pulping Tech Behandling av fibermaterial med komplexbildare före kokning
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
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
US6306334B1 (en) 1996-08-23 2001-10-23 The Weyerhaeuser Company Process for melt blowing continuous lyocell fibers
EP1161592B1 (en) * 1999-02-15 2004-09-22 Kiram AB Process for oxygen pulping of lignocellulosic material and recovery of pulping chemicals
US6686040B2 (en) 1999-02-24 2004-02-03 Weyerhaeuser Company Use of thinnings and other low specific gravity wood for lyocell products
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
US6685856B2 (en) 1999-02-24 2004-02-03 Weyerhaeuser Company Use of thinnings and other low specific gravity wood for lyocell products method
AU5317700A (en) * 1999-06-08 2000-12-28 Eastern Pulp And Paper Corporation Bleaching pulp with high-pressure O2
AU6604100A (en) * 2000-02-14 2001-08-20 Kiram Ab Process for oxygen pulping of lignocellulosic material and recovery of pulping chemicals
EP2438235A1 (en) * 2009-06-02 2012-04-11 Akzo Nobel Chemicals International B.V. Process for producing mechanical pulp
CN106968127B (zh) 2012-04-18 2019-03-01 Gp纤维素股份有限公司 用于粘胶溶液的针叶木牛皮纸浆
WO2015155788A2 (en) * 2014-04-07 2015-10-15 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
WO2019051212A1 (en) 2017-09-08 2019-03-14 Dte Materials Incorporated SELECTIVE DEPOLYMERIZATION OF CELLULOSIC MATERIALS FOR USE AS THERMAL AND ACOUSTIC INSULATORS

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 (fr) * 1963-09-19 1965-02-05 Air Liquide Délignification et blanchiment des pâtes cellulosiques chimiques et mi-chimiques
US3382149A (en) * 1964-10-29 1968-05-07 Du Pont Bleaching of hardwood sulfite pulp with hydrogen peroxide, including pretreatment with alkali

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997017489A1 (en) * 1994-05-10 1997-05-15 Stora Kopparbergs Bergslags Ab Process for oxygen delignification

Also Published As

Publication number Publication date
NO128372B (zh) 1973-11-05
US3652385A (en) 1972-03-28
FI45575C (fi) 1972-07-10
FI45575B (zh) 1972-04-04
DE2022866A1 (de) 1970-12-23
DE2022866B2 (de) 1974-03-28
FR2047420A5 (zh) 1971-03-12
AT295997B (de) 1972-01-25
DE2022866C3 (de) 1974-11-14

Similar Documents

Publication Publication Date Title
SE335053B (zh)
SE7705073L (sv) Forfarande for behandling av vedflis
AU560277B2 (en) Bleaching cellulose with oxidising agents and microwaves
GB1071706A (en) A method of making paper which dissolves or rapidly disintegrates in water
SE7504168L (sv) Forfarande for kontinuerlig blekning och delignifiering av cellulosamassa
CA920753A (en) Delignification and bleaching of chemical and semi-chemical cellulosic pulp
ES406080A1 (es) Un procedimiento para blanquear materiales.
ES420507A1 (es) Procedimiento para estabilizar un material de fibra con hi-dratos de carbono en un tratamiento oxidante alcalino.
GB829506A (en) Improvements in the manufacture of wood putp
CA943707A (en) Delignification of chemical cellulosic pulp
SE9702152D0 (sv) Minimization of metal ions during chemical pulping
GB1229269A (zh)
ZA746077B (en) Method of improving smelt properties and reducing dissolving tank explosions during pulping of wood with sodium based liquors
SE9203366L (sv) Förfarande vid delignifiering och/eller blekning av cellulosamassa
GB1119546A (en) Improved method of treating fibrous material
FR2158873A5 (en) Bleaching of wood cellulose - using nitrogen oxides
ES311273A1 (es) Un procedimiento para producir pasta blanqueada de material celulosico.
ES256927A1 (es) Procedimiento de obtenciën de una composiciën de blanqueo que contenga un borato y un hipoclorito de un metal alcalino
GB971979A (en) Improvements in cold caustic refining of cellulose
FR2189572A1 (en) Bleaching alkaline cellulosic pulp with oxygen - in presence of formaldehyde, (m)ethanol isopropanol, glycerol, sorbitol etc, to ensure slow disintegration of cellulose
Engström et al. Treatment of wood pulp with nitrogen dioxide before oxygen bleaching
ES393360A1 (es) Procedimiento de produccion de fibras totales.
GB1123071A (en) Improvements in or relating to the treatment of natural or synthetic fibres
GB651450A (en) Process of activating chlorite solutions and bleaching cellulosic materials with these solutions
GB2014902A (en) Preparing viscose solutions