FI45575C - Förfarande för behandling av cellulosahaltigt material. - Google Patents
Förfarande för behandling av cellulosahaltigt material.Info
- Publication number
- FI45575C FI45575C FI700982A FI98270A FI45575C FI 45575 C FI45575 C FI 45575C FI 700982 A FI700982 A FI 700982A FI 98270 A FI98270 A FI 98270A FI 45575 C FI45575 C FI 45575C
- Authority
- FI
- Finland
- Prior art keywords
- handling
- cellulosic material
- cellulosic
- Prior art date
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE06780/69A SE335053B (sv) | 1969-05-13 | 1969-05-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
FI45575B FI45575B (sv) | 1972-04-04 |
FI45575C true FI45575C (sv) | 1972-07-10 |
Family
ID=20269591
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI700982A FI45575C (sv) | 1969-05-13 | 1970-04-08 | Förfarande för behandling av cellulosahaltigt material. |
Country Status (7)
Country | Link |
---|---|
US (1) | US3652385A (sv) |
AT (1) | AT295997B (sv) |
DE (1) | DE2022866C3 (sv) |
FI (1) | FI45575C (sv) |
FR (1) | FR2047420A5 (sv) |
NO (1) | NO128372B (sv) |
SE (1) | SE335053B (sv) |
Families Citing this family (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE355614B (sv) * | 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 (sv) * | 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 (sv) * | 1972-07-05 | 1975-02-17 | Mo Och Domsjoe Ab | |
FI58360C (fi) * | 1974-06-14 | 1981-01-12 | Mo Och Domsjoe Ab | Foerfarande foer delignifiering av lignocellulosahaltigt material med hjaelp av syreinnehaollande gas och apparatur foer utfoerande av detta 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 (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 |
SE470065C (sv) * | 1991-04-30 | 1995-10-12 | Eka Nobel Ab | Behandling av kemisk massa med en syra och därefter en magnesium- och kalciumförening vid klorfri blekning |
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 (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 |
US6471727B2 (en) | 1996-08-23 | 2002-10-29 | Weyerhaeuser Company | Lyocell fibers, and compositions for making the same |
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 |
US6306334B1 (en) | 1996-08-23 | 2001-10-23 | The Weyerhaeuser Company | Process for melt blowing continuous lyocell fibers |
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 |
EP1161592B1 (en) * | 1999-02-15 | 2004-09-22 | Kiram AB | Process for oxygen pulping of lignocellulosic material and recovery of pulping chemicals |
US6686039B2 (en) | 1999-02-24 | 2004-02-03 | Weyerhaeuser Company | Use of thinnings and other low specific gravity wood for lyocell pulps |
US6797113B2 (en) * | 1999-02-24 | 2004-09-28 | Weyerhaeuser Company | Use of thinnings and other low specific gravity wood for lyocell pulps method |
US6685856B2 (en) | 1999-02-24 | 2004-02-03 | Weyerhaeuser Company | Use of thinnings and other low specific gravity wood for lyocell products method |
US6686040B2 (en) | 1999-02-24 | 2004-02-03 | Weyerhaeuser Company | Use of thinnings and other low specific gravity wood for lyocell products |
CA2376528A1 (en) * | 1999-06-08 | 2000-12-14 | Nana Barde | Bleaching pulp with high-pressure o2 |
WO2001059204A1 (en) * | 2000-02-14 | 2001-08-16 | 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 |
US20170058302A1 (en) * | 2014-04-07 | 2017-03-02 | 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 |
CA3075264A1 (en) | 2017-09-08 | 2019-03-14 | Dte Materials Incorporated | Selectively depolymerizing cellulosic materials for use as thermal and acoustic insulators |
Family Cites Families (11)
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 |
-
1969
- 1969-05-13 SE SE06780/69A patent/SE335053B/xx unknown
-
1970
- 1970-04-08 FI FI700982A patent/FI45575C/sv active
- 1970-05-06 FR FR7016642A patent/FR2047420A5/fr not_active Expired
- 1970-05-09 NO NO01766/70A patent/NO128372B/no unknown
- 1970-05-11 DE DE2022866A patent/DE2022866C3/de not_active Expired
- 1970-05-12 US US36670A patent/US3652385A/en not_active Expired - Lifetime
- 1970-05-13 AT AT434170A patent/AT295997B/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US3652385A (en) | 1972-03-28 |
FI45575B (sv) | 1972-04-04 |
AT295997B (de) | 1972-01-25 |
DE2022866A1 (de) | 1970-12-23 |
FR2047420A5 (sv) | 1971-03-12 |
DE2022866B2 (de) | 1974-03-28 |
NO128372B (sv) | 1973-11-05 |
SE335053B (sv) | 1971-05-10 |
DE2022866C3 (de) | 1974-11-14 |
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