ES2038954A6 - Bleaching of paper pulp - Google Patents
Bleaching of paper pulpInfo
- Publication number
- ES2038954A6 ES2038954A6 ES9150024A ES9150024A ES2038954A6 ES 2038954 A6 ES2038954 A6 ES 2038954A6 ES 9150024 A ES9150024 A ES 9150024A ES 9150024 A ES9150024 A ES 9150024A ES 2038954 A6 ES2038954 A6 ES 2038954A6
- Authority
- ES
- Spain
- Prior art keywords
- bleaching
- paper pulp
- pulp
- chlorine
- treated
- 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.)
- Expired - Fee Related
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
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
-
- 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
-
- 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
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
Abstract
A modified bleaching process with improved reduction of organo-chlorines from the bleaching effluents without high capital cost. The unbleached pulp is initially treated with oxygen and/or hydrogen peroxide and subsequently contacting the treated pulp with a chlorine and/or chlorine dioxide and/or hypochlorite without an intervening washing step. The initial oxidizing stage is carried out at pH 10 to 11 at a temperature of from 60 DEG C to 100 DEG C for a period of 3 to 60 minutes.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPJ869590 | 1990-02-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2038954A6 true ES2038954A6 (en) | 1993-08-01 |
Family
ID=3774506
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES9150024A Expired - Fee Related ES2038954A6 (en) | 1990-02-19 | 1991-02-11 | Bleaching of paper pulp |
Country Status (6)
Country | Link |
---|---|
BR (1) | BR9106033A (en) |
ES (1) | ES2038954A6 (en) |
NZ (1) | NZ237019A (en) |
PT (1) | PT96816B (en) |
WO (1) | WO1991012366A1 (en) |
ZA (1) | ZA911062B (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9206415D0 (en) * | 1992-03-24 | 1992-05-06 | Albright & Wilson | Stabilisation of bleach liquors |
CN100500990C (en) * | 2005-09-02 | 2009-06-17 | 华南理工大学 | Paper pulp cleaning and bleaching process |
US8012770B2 (en) | 2009-07-31 | 2011-09-06 | Invisible Sentinel, Inc. | Device for detection of antigens and uses thereof |
US9557330B2 (en) | 2009-10-09 | 2017-01-31 | Invisible Sentinel, Inc. | Device for detection of analytes and uses thereof |
WO2012103511A2 (en) | 2011-01-27 | 2012-08-02 | Invisible Sentinel, Inc. | Analyte detection devices, multiplex and tabletop devices for detection of analytes, and uses thereof |
WO2013134503A2 (en) | 2012-03-09 | 2013-09-12 | Invisible Sentinel, Inc. | Methods And Compositions For Detecting Multiple Analytes With A Single Signal |
FR3062138B1 (en) * | 2017-01-23 | 2019-06-07 | Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses | PROCESS FOR WHITENING A PAPER PULP |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1404605A (en) * | 1964-05-22 | 1965-07-02 | Air Liquide | Improvement in delignification of chemical cellulose pulps |
CA897361A (en) * | 1969-12-19 | 1972-04-11 | E. Mallett Samuel | Oxygen bleaching process |
DE2219504C2 (en) * | 1972-04-21 | 1974-10-03 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt | Multi-stage bleaching of cellulose with significantly reduced use of chlorine |
DE2841013C2 (en) * | 1978-09-21 | 1984-06-07 | Degussa Ag, 6000 Frankfurt | Process for full bleaching of pulp |
CA1164157A (en) * | 1980-09-23 | 1984-03-27 | Hortensia N.F. Rodriguez | Bleaching of bagasse pulps with alkali-oxygen |
FR2566015B1 (en) * | 1984-06-15 | 1986-08-29 | Centre Tech Ind Papier | PROCESS FOR BLEACHING MECHANICAL PASTE WITH HYDROGEN PEROXIDE |
DE3802401A1 (en) * | 1988-01-28 | 1989-08-03 | Degussa | METHOD FOR PRODUCING SEMI-BLEACHED FUEL |
-
1991
- 1991-02-05 NZ NZ237019A patent/NZ237019A/en unknown
- 1991-02-11 BR BR919106033A patent/BR9106033A/en unknown
- 1991-02-11 ES ES9150024A patent/ES2038954A6/en not_active Expired - Fee Related
- 1991-02-11 WO PCT/AU1991/000045 patent/WO1991012366A1/en not_active IP Right Cessation
- 1991-02-13 ZA ZA911062A patent/ZA911062B/en unknown
- 1991-02-19 PT PT96816A patent/PT96816B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
BR9106033A (en) | 1993-01-19 |
ZA911062B (en) | 1991-11-27 |
WO1991012366A1 (en) | 1991-08-22 |
NZ237019A (en) | 1992-11-25 |
PT96816A (en) | 1991-10-31 |
PT96816B (en) | 1998-07-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 20040916 |