CA2017334A1 - Ozone treatment of chlorine dioxide/chlorine chlorinated pulp - Google Patents
Ozone treatment of chlorine dioxide/chlorine chlorinated pulpInfo
- Publication number
- CA2017334A1 CA2017334A1 CA 2017334 CA2017334A CA2017334A1 CA 2017334 A1 CA2017334 A1 CA 2017334A1 CA 2017334 CA2017334 CA 2017334 CA 2017334 A CA2017334 A CA 2017334A CA 2017334 A1 CA2017334 A1 CA 2017334A1
- Authority
- CA
- Canada
- Prior art keywords
- pulp
- chlorine
- present
- ozone treatment
- chlorinated
- 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.)
- Granted
Links
- 239000000460 chlorine Substances 0.000 title abstract 2
- 229910052801 chlorine Inorganic materials 0.000 title abstract 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 title 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 title 1
- 239000004155 Chlorine dioxide Substances 0.000 title 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title 1
- 235000019398 chlorine dioxide Nutrition 0.000 title 1
- 229920001131 Pulp (paper) Polymers 0.000 abstract 2
- 238000004061 bleaching Methods 0.000 abstract 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract 1
- 239000007844 bleaching agent Substances 0.000 abstract 1
- 125000001309 chloro group Chemical group Cl* 0.000 abstract 1
- 238000000605 extraction Methods 0.000 abstract 1
- 150000004820 halides Chemical class 0.000 abstract 1
- 238000006385 ozonation reaction Methods 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
Landscapes
- Paper (AREA)
Abstract
The present invention provides for improvements in the preparation of cellulosic wood pulp for use in papermaking, and specifically to enhancement of the quality of a pulp which has been subjected to a chlorine-based bleaching agent, by subjecting the chlorinated pulp to ozonation prior to an extraction stage in the bleaching sequence. The improved pulp of the present invention includes reduction of total organically bound chlorine residues in the wood pulp and adsorbed organic halides (AOX) in the effluent, and has good brightness and viscosity. The advantages of the present invention may be accomplished by means of a bleaching sequence that employs as few as four stages, namely DZED
with attendant relatively lower capital investment than heretofore possible.
with attendant relatively lower capital investment than heretofore possible.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2017334 CA2017334C (en) | 1990-05-23 | 1990-05-23 | Ozone treatment of chlorine dioxide/chlorine chlorinated pulp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2017334 CA2017334C (en) | 1990-05-23 | 1990-05-23 | Ozone treatment of chlorine dioxide/chlorine chlorinated pulp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2017334A1 true CA2017334A1 (en) | 1991-11-23 |
| CA2017334C CA2017334C (en) | 2000-07-25 |
Family
ID=4145043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2017334 Expired - Fee Related CA2017334C (en) | 1990-05-23 | 1990-05-23 | Ozone treatment of chlorine dioxide/chlorine chlorinated pulp |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2017334C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6174409B1 (en) | 1997-09-19 | 2001-01-16 | American Air Liquide Inc. | Method to improve final bleached pulp strength properties by adjusting the CI02:03 ration within a single (D/Z) stage of the bleaching process |
-
1990
- 1990-05-23 CA CA 2017334 patent/CA2017334C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6174409B1 (en) | 1997-09-19 | 2001-01-16 | American Air Liquide Inc. | Method to improve final bleached pulp strength properties by adjusting the CI02:03 ration within a single (D/Z) stage of the bleaching process |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2017334C (en) | 2000-07-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |