OA136E - - Google Patents
Info
- Publication number
- OA136E OA136E OA53633A OA53633A OA136E OA 136 E OA136 E OA 136E OA 53633 A OA53633 A OA 53633A OA 53633 A OA53633 A OA 53633A OA 136 E OA136 E OA 136E
- Authority
- OA
- OAPI
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
- D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA683771 | 1968-06-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| OA136E true OA136E (en) | 1970-12-15 |
Family
ID=25561209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| OA53633A OA136E (en) | 1968-06-13 | 1969-06-12 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3657065A (en) |
| BR (1) | BR6909697D0 (en) |
| ES (1) | ES368284A1 (en) |
| FI (1) | FI50551C (en) |
| FR (1) | FR2010827A6 (en) |
| NO (1) | NO126630B (en) |
| OA (1) | OA136E (en) |
| SE (1) | SE363138B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3716447A (en) * | 1969-12-15 | 1973-02-13 | Dow Chemical Co | Delignification and bleaching of cellulose pulp with oxygen and alkali in the presence of magnesium chloride inhibitor |
| US4338158A (en) * | 1976-04-09 | 1982-07-06 | Weyerhaeuser Company | Pulping in the presence of a protector |
| US4331507A (en) * | 1979-12-10 | 1982-05-25 | Dorr-Oliver Incorporated | Desilication in alkaline pulp processes |
| DE3110864C2 (en) * | 1981-03-20 | 1984-10-04 | Alfons K. 7513 Stutensee Herr | Process for the production of an asbestos-free building material |
| US5302248A (en) * | 1992-08-28 | 1994-04-12 | The United States Of America As Represented By The Secretary Of Agriculture | Delignification of wood pulp by vanadium-substituted polyoxometalates |
| US5549789A (en) * | 1992-08-28 | 1996-08-27 | The United States Of America As Represented By The Secretary Of Agriculture | Oxidation of lignin and polysaccharides mediated by polyoxometalate treatment of wood pulp |
| US20030024664A1 (en) * | 2001-02-27 | 2003-02-06 | Gibson Aileen Reyes | Eop & Ep process for bleaching of chemical pulp |
| US7976676B2 (en) * | 2006-12-18 | 2011-07-12 | International Paper Company | Process of bleaching softwood pulps in a D1 or D2 stage in a presence of a weak base |
| US7976677B2 (en) * | 2006-12-18 | 2011-07-12 | International Paper Company | Process of bleaching hardwood pulps in a D1 or D2 stage in a presence of a weak base |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1887863A (en) * | 1929-11-15 | 1932-11-15 | Arthur D Little Ind Corp | Process for making pulp |
| US2169473A (en) * | 1935-02-08 | 1939-08-15 | Cellulose Res Corp | Method of producing cellulose pulp |
| FR1387853A (en) * | 1963-09-19 | 1965-02-05 | Air Liquide | Delignification and bleaching of chemical and semi-chemical cellulose pulps |
| US3382149A (en) * | 1964-10-29 | 1968-05-07 | Du Pont | Bleaching of hardwood sulfite pulp with hydrogen peroxide, including pretreatment with alkali |
-
1969
- 1969-06-05 SE SE07955/69A patent/SE363138B/xx unknown
- 1969-06-11 FI FI691739A patent/FI50551C/en active
- 1969-06-11 US US832477A patent/US3657065A/en not_active Expired - Lifetime
- 1969-06-12 ES ES368284A patent/ES368284A1/en not_active Expired
- 1969-06-12 FR FR6919523A patent/FR2010827A6/fr not_active Expired
- 1969-06-12 OA OA53633A patent/OA136E/xx unknown
- 1969-06-12 NO NO02429/69A patent/NO126630B/no unknown
- 1969-06-12 BR BR209697/69A patent/BR6909697D0/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ES368284A1 (en) | 1971-07-16 |
| NO126630B (en) | 1973-03-05 |
| FR2010827A6 (en) | 1970-02-20 |
| BR6909697D0 (en) | 1973-05-03 |
| FI50551B (en) | 1975-12-31 |
| US3657065A (en) | 1972-04-18 |
| FI50551C (en) | 1976-04-12 |
| SE363138B (en) | 1974-01-07 |