DE140804T1 - HYPOCHLORITE TREATMENT OF CHEMICAL PAPER PULPS. - Google Patents
HYPOCHLORITE TREATMENT OF CHEMICAL PAPER PULPS.Info
- Publication number
- DE140804T1 DE140804T1 DE198484420167T DE84420167T DE140804T1 DE 140804 T1 DE140804 T1 DE 140804T1 DE 198484420167 T DE198484420167 T DE 198484420167T DE 84420167 T DE84420167 T DE 84420167T DE 140804 T1 DE140804 T1 DE 140804T1
- Authority
- DE
- Germany
- Prior art keywords
- hypochlorite
- hydrogen peroxide
- added
- weight
- chemical paper
- Prior art date
- 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.)
- Pending
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
- D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Detergent Compositions (AREA)
- Cosmetics (AREA)
Abstract
1. Process for bleaching chemical paper pulps by means of an alkaline hypochlorite solution and then hydrogen peroxide, without intermediate washing of the treated pulp, characterized in that the hydrogen peroxide is added when 85% to 95% of the hypochlorite is consumed.
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8316500A FR2553444B1 (en) | 1983-10-13 | 1983-10-13 | HYPOCHLORITE TREATMENT OF CHEMICAL PAPER PULP |
Publications (1)
Publication Number | Publication Date |
---|---|
DE140804T1 true DE140804T1 (en) | 1985-12-05 |
Family
ID=9293226
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8484420167T Expired DE3461941D1 (en) | 1983-10-13 | 1984-10-05 | Hypochlorite treatment of chemical paper pulps |
DE198484420167T Pending DE140804T1 (en) | 1983-10-13 | 1984-10-05 | HYPOCHLORITE TREATMENT OF CHEMICAL PAPER PULPS. |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8484420167T Expired DE3461941D1 (en) | 1983-10-13 | 1984-10-05 | Hypochlorite treatment of chemical paper pulps |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0140804B1 (en) |
JP (1) | JPS6099086A (en) |
AT (1) | ATE24745T1 (en) |
AU (1) | AU565124B2 (en) |
CA (1) | CA1269805A (en) |
DE (2) | DE3461941D1 (en) |
ES (1) | ES536713A0 (en) |
FI (1) | FI75374C (en) |
FR (1) | FR2553444B1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NZ229702A (en) * | 1989-06-23 | 1993-03-26 | Nz Forest Products Ltd Formerl | Bleaching chemical pulp including an activation step followed by an alkaline extraction step with no intervening washing step |
WO1998026128A1 (en) * | 1996-12-11 | 1998-06-18 | Akio Mita | Method for storing and transporting cellulosic and process for manufacturing pulp |
CN100500990C (en) * | 2005-09-02 | 2009-06-17 | 华南理工大学 | Paper pulp cleaning and bleaching process |
JP4968638B2 (en) * | 2005-11-15 | 2012-07-04 | 好高 青山 | Shaft-shaped parts supply device |
JP4941726B2 (en) * | 2007-01-12 | 2012-05-30 | 沖縄県 | Method for bleaching discolored wood |
JP4943908B2 (en) * | 2007-03-26 | 2012-05-30 | 陽一 松本 | Method for producing kakkon fiber and kuzu fiber obtained by the method |
JP2008264866A (en) * | 2007-04-20 | 2008-11-06 | Yoshitaka Aoyama | Apparatus and method of controlling operation of electrode in electric resistance welding |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE736070C (en) * | 1938-07-01 | 1943-06-07 | Degussa | Process for treating pulp |
US2527563A (en) * | 1947-08-13 | 1950-10-31 | Buffalo Electro Chem Co | Method of bleaching semichemical pulps |
US2661261A (en) * | 1950-06-30 | 1953-12-01 | Buffalo Electro Chem Co | Method of superbleaching chemical pulp |
US2865701A (en) * | 1953-12-07 | 1958-12-23 | Nat Distillers Chem Corp | Process of bleaching kraft pulp with alkaline hypochlorite bleach acidifying the pulp containing residual chlorine and then bleaching with alkaline peroxide |
US2920011A (en) * | 1955-03-18 | 1960-01-05 | Waldorf Paper Prod Co | Elevated temperature and pressure two stage hypochlorite peroxide pulp bleaching process |
-
1983
- 1983-10-13 FR FR8316500A patent/FR2553444B1/en not_active Expired
-
1984
- 1984-10-05 DE DE8484420167T patent/DE3461941D1/en not_active Expired
- 1984-10-05 DE DE198484420167T patent/DE140804T1/en active Pending
- 1984-10-05 EP EP84420167A patent/EP0140804B1/en not_active Expired
- 1984-10-05 AT AT84420167T patent/ATE24745T1/en not_active IP Right Cessation
- 1984-10-10 FI FI843975A patent/FI75374C/en not_active IP Right Cessation
- 1984-10-11 ES ES536713A patent/ES536713A0/en active Granted
- 1984-10-12 CA CA000465302A patent/CA1269805A/en not_active Expired - Lifetime
- 1984-10-12 AU AU34211/84A patent/AU565124B2/en not_active Ceased
- 1984-10-12 JP JP59212741A patent/JPS6099086A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
ES8603607A1 (en) | 1985-12-16 |
FI75374B (en) | 1988-02-29 |
JPS6099086A (en) | 1985-06-01 |
ES536713A0 (en) | 1985-12-16 |
DE3461941D1 (en) | 1987-02-12 |
ATE24745T1 (en) | 1987-01-15 |
EP0140804A1 (en) | 1985-05-08 |
FI843975A0 (en) | 1984-10-10 |
AU565124B2 (en) | 1987-09-03 |
FR2553444A1 (en) | 1985-04-19 |
FR2553444B1 (en) | 1986-07-18 |
EP0140804B1 (en) | 1987-01-07 |
CA1269805A (en) | 1990-06-05 |
FI75374C (en) | 1988-06-09 |
FI843975L (en) | 1985-04-14 |
JPS6214678B2 (en) | 1987-04-03 |
AU3421184A (en) | 1985-04-18 |
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