BE699505A - - Google Patents
Info
- Publication number
- BE699505A BE699505A BE699505DA BE699505A BE 699505 A BE699505 A BE 699505A BE 699505D A BE699505D A BE 699505DA BE 699505 A BE699505 A BE 699505A
- Authority
- BE
- Belgium
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
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
- D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
- D21C9/142—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 in a multistage process involving ClO2/Cl2 exclusively
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US46769765A | 1965-06-28 | 1965-06-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE699505A true BE699505A (en:Method) | 1967-11-16 |
Family
ID=37084838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE699505D BE699505A (en:Method) | 1965-06-28 | 1967-06-05 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3433702A (en:Method) |
| BE (1) | BE699505A (en:Method) |
| CA (1) | CA932908A (en:Method) |
| DE (1) | DE1594861B2 (en:Method) |
| FR (1) | FR1484998A (en:Method) |
| GB (1) | GB1145339A (en:Method) |
| NO (1) | NO126747B (en:Method) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1100709A (en) * | 1965-06-25 | 1968-01-24 | Pulp Paper Res Inst | Two-stage purification of fibrous cellulose material |
| USRE28777E (en) * | 1969-02-06 | 1976-04-20 | Ethyl Corporation | Refining of vegetable matter and delignification of the refined matter with chlorine dioxide |
| US3884752A (en) * | 1973-09-17 | 1975-05-20 | Int Paper Co | Single vessel wood pulp bleaching with chlorine dioxide followed by sodium hypochlorite or alkaline extraction |
| US3907632A (en) * | 1973-10-23 | 1975-09-23 | Ppg Industries Inc | Bleaching cellulosic pulps with gaseous chlorine at a pH of 7 to 10 in a multistage bleaching process |
| US4081317A (en) * | 1973-12-18 | 1978-03-28 | Hooker Chemicals & Plastics Corporation | Process for the reduction of effluent color from a cellulosic pulp bleaching sequence |
| SE391750B (sv) * | 1974-03-21 | 1977-02-28 | Kamyr Ab | Sett att i ett kerl kontinuerligt behandla cellulosamassa med klor |
| US4039374A (en) * | 1975-08-29 | 1977-08-02 | Union Camp Corporation | Bleaching of cellulosic pulp fibers with chlorine dioxide in the presence of a vanadium compound |
| US4096029A (en) * | 1976-04-26 | 1978-06-20 | The Dow Chemical Company | Cellulosic pulp delignification using an acidic bromine-chlorine mixture |
| US4325783A (en) * | 1978-03-30 | 1982-04-20 | Erco Industries Limited | Bleaching procedure using chlorine dioxide and chlorine solutions |
| US4259149A (en) * | 1978-05-03 | 1981-03-31 | Hooker Chemicals & Plastics Corp. | Method of reducing waste stream pollutants by the control and separation of waste contaminants from a multi-stage cellulosic bleaching sequence |
| US4299653A (en) * | 1979-04-16 | 1981-11-10 | Erco Industries Limited | Method of bleaching pulp with an aqueous solution of chlorine dioxide and chlorine followed by a chlorine solution |
| EP0496827A1 (en) * | 1989-10-19 | 1992-08-05 | North Carolina State University | Chlorine dioxide pulp bleaching process using sequential chlorine addition |
| EP0496782B1 (en) * | 1989-10-19 | 1996-03-20 | North Carolina State University | High efficiency chlorine dioxide pulp bleaching process |
| US5268075A (en) * | 1989-10-19 | 1993-12-07 | North Carolina State University | High efficiency two-step, high-low pH chlorine dioxide pulp bleaching process |
| US5030324A (en) * | 1990-01-29 | 1991-07-09 | Champion International Corporation | Sequential bleaching procedure using chlorine and chlorine dioxide in a first chlorination stage of a multistage bleaching process |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2513788A (en) * | 1947-01-31 | 1950-07-04 | Brown Co | Bleaching of sulfate wood pulp |
| BE518419A (en:Method) * | 1952-03-26 | |||
| US2903326A (en) * | 1956-10-17 | 1959-09-08 | Pennsalt Chemicals Corp | Improved process for bleaching cellulose pulp using chlorate |
| US3020197A (en) * | 1960-08-05 | 1962-02-06 | Allied Chem | Method for production of high brightness high strength wood pulps |
-
1965
- 1965-06-28 US US467697A patent/US3433702A/en not_active Expired - Lifetime
- 1965-11-06 CA CA944750A patent/CA932908A/en not_active Expired
-
1966
- 1966-06-28 NO NO00163696A patent/NO126747B/no unknown
- 1966-06-28 DE DE1594861A patent/DE1594861B2/de active Granted
- 1966-06-28 GB GB28988/66A patent/GB1145339A/en not_active Expired
- 1966-06-28 FR FR67213A patent/FR1484998A/fr not_active Expired
-
1967
- 1967-06-05 BE BE699505D patent/BE699505A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1594861C3 (en:Method) | 1974-05-09 |
| GB1145339A (en) | 1969-03-12 |
| DE1594861B2 (de) | 1973-10-04 |
| CA932908A (en) | 1973-09-04 |
| FR1484998A (fr) | 1967-06-16 |
| NO126747B (en:Method) | 1973-03-19 |
| DE1594861A1 (de) | 1972-05-25 |
| US3433702A (en) | 1969-03-18 |