FI45575B - - Google Patents

Info

Publication number
FI45575B
FI45575B FI0982/70A FI98270A FI45575B FI 45575 B FI45575 B FI 45575B FI 0982/70 A FI0982/70 A FI 0982/70A FI 98270 A FI98270 A FI 98270A FI 45575 B FI45575 B FI 45575B
Authority
FI
Finland
Application number
FI0982/70A
Other languages
Finnish (fi)
Other versions
FI45575C (fi
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
Application granted granted Critical
Publication of FI45575B publication Critical patent/FI45575B/fi
Publication of FI45575C publication Critical patent/FI45575C/fi

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)
FI700982A 1969-05-13 1970-04-08 Selluloosapitoisen aineen käsittelymenetelmä. FI45575C (fi)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
FI45575B true FI45575B (fr) 1972-04-04
FI45575C FI45575C (fi) 1972-07-10

Family

ID=20269591

Family Applications (1)

Application Number Title Priority Date Filing Date
FI700982A FI45575C (fi) 1969-05-13 1970-04-08 Selluloosapitoisen aineen käsittelymenetelmä.

Country Status (7)

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

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE355614B (fr) * 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 (fr) * 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 (fr) * 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 (fr) * 1992-02-24 1997-03-11 Charles W. Hankins Procede de desintegration integre de dechets de papier produisant des fibres de papier de categorie hygienique
SE502667C2 (sv) * 1993-07-12 1995-12-04 Kvaerner Pulping Tech Behandling av fibermaterial med komplexbildare före kokning
SE9401628L (sv) * 1994-05-10 1995-11-11 Stora Kopparbergs Bergslags Ab Förfarande vid syrgasdelignifiering
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 (fr) * 1999-02-15 2004-09-22 Kiram AB Procede de cuisson a l'oxygene de materiau lignocellulosique et de recuperation d'agents chimiques de cuisson
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 (fr) * 2009-06-02 2012-04-11 Akzo Nobel Chemicals International B.V. Procédé pour produire une pâte mécanique
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 (fr) * 2014-04-07 2015-10-15 Praj Industries Limited Procédé d'hydrolyse enzymatique efficace de matières lignocellulosiques
EP3356596A1 (fr) * 2015-09-30 2018-08-08 Imerys Minerals Limited Procédés de blanchiment de pâtes aqueuses, et compositions destinées à être utilisées dans ces procédés
WO2019051212A1 (fr) 2017-09-08 2019-03-14 Dte Materials Incorporated Dépolymérisation sélective de matériaux cellulosiques destinés à être utilisés en tant qu'isolants thermiques et acoustiques

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

Also Published As

Publication number Publication date
NO128372B (fr) 1973-11-05
US3652385A (en) 1972-03-28
FI45575C (fi) 1972-07-10
SE335053B (fr) 1971-05-10
DE2022866A1 (de) 1970-12-23
DE2022866B2 (de) 1974-03-28
FR2047420A5 (fr) 1971-03-12
AT295997B (de) 1972-01-25
DE2022866C3 (de) 1974-11-14

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