FR1601408A - - Google Patents
Info
- Publication number
- FR1601408A FR1601408A FR1601408DA FR1601408A FR 1601408 A FR1601408 A FR 1601408A FR 1601408D A FR1601408D A FR 1601408DA FR 1601408 A FR1601408 A FR 1601408A
- Authority
- FR
- France
- Legal status (The legal status 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 status listed.)
- Expired
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
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
-
- 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
- D21C9/1068—Bleaching ; Apparatus therefor with O2
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA673680 | 1967-06-20 | ||
| ZA683772 | 1968-06-13 | ||
| US16195471A | 1971-07-09 | 1971-07-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR1601408A true FR1601408A (pt) | 1970-08-24 |
Family
ID=27388705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR1601408D Expired FR1601408A (pt) | 1967-06-20 | 1968-06-20 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3725194A (pt) |
| FR (1) | FR1601408A (pt) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4948902A (pt) * | 1972-09-13 | 1974-05-11 | ||
| JPS5094201A (pt) * | 1974-12-23 | 1975-07-26 | ||
| DE2523191A1 (de) * | 1974-06-14 | 1975-12-18 | Mo Och Domsjoe Ab | Verfahren zur delignizifierung von lignocellulosischem material |
| JPS5510715B1 (pt) * | 1971-06-24 | 1980-03-18 | ||
| US5302244A (en) * | 1992-02-18 | 1994-04-12 | Domtar Inc. | Oxygen delignification of waste cellulosic paper products |
| US5332471A (en) * | 1991-05-21 | 1994-07-26 | Air Products And Chemicals, Inc. | Dye stripping by oxygen in secondary fiber recovery |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4594130A (en) * | 1978-11-27 | 1986-06-10 | Chang Pei Ching | Pulping of lignocellulose with aqueous alcohol and alkaline earth metal salt catalyst |
| US4431480A (en) * | 1981-10-27 | 1984-02-14 | The Black Clawson Company | Method and apparatus for controlled addition of alkaline chemicals to an oxygen delignification reaction |
| NO152907C (no) * | 1983-06-29 | 1985-12-11 | Peterson & Son As M | Fremgangsmaate til delignifisering av kjemisk masse. |
| DE3802401A1 (de) * | 1988-01-28 | 1989-08-03 | Degussa | Verfahren zur herstellung von halbgebleichtem kraftzellstoff |
| DE3923728A1 (de) * | 1989-07-18 | 1991-01-24 | Degussa | Verfahren zur stabilisierung der viskositaet von zellstoffen |
| SE470538C (sv) * | 1992-12-02 | 1996-02-26 | Kvaerner Pulping Tech | Sätt vid blekning av massa utan användning av klorhaltiga kemikalier |
| SE9401628L (sv) * | 1994-05-10 | 1995-11-11 | Stora Kopparbergs Bergslags Ab | Förfarande vid syrgasdelignifiering |
| US6569284B1 (en) | 1996-09-24 | 2003-05-27 | International Paper Company | Elemental-chlorine-free bleaching process having an initial Eo or Eop stage |
| AU5317700A (en) * | 1999-06-08 | 2000-12-28 | Eastern Pulp And Paper Corporation | Bleaching pulp with high-pressure O2 |
| US20020129911A1 (en) * | 2000-10-16 | 2002-09-19 | Marcoccia Bruno S. | Process and configuration for providing external upflow/internal downflow in a continuous digester |
| US8980051B2 (en) * | 2009-04-24 | 2015-03-17 | International Paper Company | Sulfonation of pulp produced by alkali pulping process |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2147618A (en) * | 1936-04-01 | 1939-02-14 | West Virginia Pulp & Paper Com | Method of bleaching pulp |
| US2466633A (en) * | 1948-05-26 | 1949-04-05 | James M Daily | Method of bleaching cellulosic pulp |
| BE526577A (pt) * | 1953-02-18 | |||
| CA632280A (en) * | 1958-07-02 | 1961-12-05 | Kimberly-Clark Corporation | Manufacture of bleached cellulosic products resistant to brightness reversion |
| 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 |
| US3436302A (en) * | 1965-09-02 | 1969-04-01 | Dow Chemical Co | Method of bleaching groundwood pulp web with acid |
-
1968
- 1968-06-20 FR FR1601408D patent/FR1601408A/fr not_active Expired
-
1971
- 1971-07-09 US US00161954A patent/US3725194A/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5510715B1 (pt) * | 1971-06-24 | 1980-03-18 | ||
| JPS4948902A (pt) * | 1972-09-13 | 1974-05-11 | ||
| DE2523191A1 (de) * | 1974-06-14 | 1975-12-18 | Mo Och Domsjoe Ab | Verfahren zur delignizifierung von lignocellulosischem material |
| JPS5094201A (pt) * | 1974-12-23 | 1975-07-26 | ||
| JPS5039161B2 (pt) * | 1974-12-23 | 1975-12-15 | ||
| US5332471A (en) * | 1991-05-21 | 1994-07-26 | Air Products And Chemicals, Inc. | Dye stripping by oxygen in secondary fiber recovery |
| US5302244A (en) * | 1992-02-18 | 1994-04-12 | Domtar Inc. | Oxygen delignification of waste cellulosic paper products |
Also Published As
| Publication number | Publication date |
|---|---|
| US3725194A (en) | 1973-04-03 |