SE9402542D0 - Method and apparatus for bleaching with pressurized peroxide - Google Patents
Method and apparatus for bleaching with pressurized peroxideInfo
- Publication number
- SE9402542D0 SE9402542D0 SE9402542A SE9402542A SE9402542D0 SE 9402542 D0 SE9402542 D0 SE 9402542D0 SE 9402542 A SE9402542 A SE 9402542A SE 9402542 A SE9402542 A SE 9402542A SE 9402542 D0 SE9402542 D0 SE 9402542D0
- Authority
- SE
- Sweden
- Prior art keywords
- pulp
- bleaching
- reactor
- stage
- pressurized peroxide
- Prior art date
Links
Abstract
The invention relates to a method of bleaching pulp, preferably in a pressurized peroxide stage, in which bleaching-necessary supplements are delivered to the pulp and the pulp is introduced to the upper end of a generally vertical-type reactor and allowed to pass down therethrough. A desired bleaching stage pressure is obtained by delivering steam, preferably low pressure steam, to the upper end of the reactor and the pulp is allowed to move down in the reactor under its own weight, therewith producing an essentially continuous increase in pressure in the pulp, from the upper end of the reactor to its lower end. The invention also relates to an arrangement for carrying out the method when bleaching pulp, preferably in a pressurized peroxide stage. The arrangement includes a stand pipe (101, 201) or a corresponding device for feeding pulp to a bleaching stage and for delivering pulp-bleaching substances; an essentially vertical-type reactor (103, 203) for the pressurized peroxide bleaching process, and a further stand pipe (107, 207) for degassing the pulp after the bleaching process.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9402542A SE9402542D0 (en) | 1994-07-20 | 1994-07-20 | Method and apparatus for bleaching with pressurized peroxide |
| AU13934/95A AU1393495A (en) | 1994-07-20 | 1994-11-21 | A method and an arrangement relating to bleaching with pressurized peroxide |
| PCT/SE1994/001111 WO1996002699A1 (en) | 1994-07-20 | 1994-11-21 | A method and an arrangement relating to bleaching with pressurized peroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9402542A SE9402542D0 (en) | 1994-07-20 | 1994-07-20 | Method and apparatus for bleaching with pressurized peroxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE9402542D0 true SE9402542D0 (en) | 1994-07-20 |
Family
ID=20394779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE9402542A SE9402542D0 (en) | 1994-07-20 | 1994-07-20 | Method and apparatus for bleaching with pressurized peroxide |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU1393495A (en) |
| SE (1) | SE9402542D0 (en) |
| WO (1) | WO1996002699A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL202075A (en) * | 1954-11-19 | Fmc Corp | ||
| CA918978A (en) * | 1970-01-08 | 1973-01-16 | G. Jamieson Allan | Oxygen bleaching |
| ZA924351B (en) * | 1991-06-27 | 1993-03-31 | Ahlstroem Oy | Ozone bleaching process |
| SE500113C2 (en) * | 1992-07-09 | 1994-04-18 | Kamyr Ab | Method of bleaching pulp for disposal of released metals |
| SE500335C2 (en) * | 1992-10-26 | 1994-06-06 | Sca Wifsta Oestrand Ab | Bleaching of sulfate pulp with peroxide-ozone-peroxide |
| SE9303233L (en) * | 1993-10-01 | 1994-10-10 | Kvaerner Pulping Tech | Chlorine-free bleaching of chemical pulp |
-
1994
- 1994-07-20 SE SE9402542A patent/SE9402542D0/en unknown
- 1994-11-21 AU AU13934/95A patent/AU1393495A/en not_active Abandoned
- 1994-11-21 WO PCT/SE1994/001111 patent/WO1996002699A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| AU1393495A (en) | 1996-02-16 |
| WO1996002699A1 (en) | 1996-02-01 |
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