JPH0415313B2 - - Google Patents
Info
- Publication number
- JPH0415313B2 JPH0415313B2 JP62130081A JP13008187A JPH0415313B2 JP H0415313 B2 JPH0415313 B2 JP H0415313B2 JP 62130081 A JP62130081 A JP 62130081A JP 13008187 A JP13008187 A JP 13008187A JP H0415313 B2 JPH0415313 B2 JP H0415313B2
- Authority
- JP
- Japan
- Prior art keywords
- pulp
- extraction
- effluent
- chlorination
- washing
- 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 - Lifetime
Links
- 238000000605 extraction Methods 0.000 claims description 59
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 48
- 238000005406 washing Methods 0.000 claims description 31
- 238000005660 chlorination reaction Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 12
- 238000004061 bleaching Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims 2
- 238000002474 experimental method Methods 0.000 description 8
- 239000000523 sample Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 235000019398 chlorine dioxide Nutrition 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000004155 Chlorine dioxide Substances 0.000 description 3
- 241000218657 Picea Species 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000012670 alkaline solution Substances 0.000 description 3
- 210000000988 bone and bone Anatomy 0.000 description 3
- 239000002655 kraft paper Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- WBZRSFDJNJXREC-UHFFFAOYSA-N Cl[Cl]Cl Chemical compound Cl[Cl]Cl WBZRSFDJNJXREC-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000013068 control sample Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 125000000621 oxo-lambda(3)-chloranyloxy group Chemical group *OCl=O 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 238000004076 pulp bleaching Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA510446 | 1986-05-30 | ||
| CA000510446A CA1294396C (en) | 1986-05-30 | 1986-05-30 | Process for decreasing the charge of chemical required in a bleaching extraction stage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6328993A JPS6328993A (ja) | 1988-02-06 |
| JPH0415313B2 true JPH0415313B2 (fi) | 1992-03-17 |
Family
ID=4133252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62130081A Granted JPS6328993A (ja) | 1986-05-30 | 1987-05-28 | 改良された漂白方法および漂白装置 |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS6328993A (fi) |
| CA (1) | CA1294396C (fi) |
| FI (1) | FI91289C (fi) |
| SE (1) | SE500585C2 (fi) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56159384A (en) * | 1980-04-10 | 1981-12-08 | Sca Development Ab | Production of mechanical cellulose pulp |
-
1986
- 1986-05-30 CA CA000510446A patent/CA1294396C/en not_active Expired - Lifetime
-
1987
- 1987-05-22 SE SE8702141A patent/SE500585C2/sv not_active IP Right Cessation
- 1987-05-28 FI FI872391A patent/FI91289C/fi not_active IP Right Cessation
- 1987-05-28 JP JP62130081A patent/JPS6328993A/ja active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56159384A (en) * | 1980-04-10 | 1981-12-08 | Sca Development Ab | Production of mechanical cellulose pulp |
Also Published As
| Publication number | Publication date |
|---|---|
| SE8702141D0 (sv) | 1987-05-22 |
| JPS6328993A (ja) | 1988-02-06 |
| FI91289C (fi) | 1994-06-10 |
| SE8702141L (sv) | 1987-12-01 |
| SE500585C2 (sv) | 1994-07-18 |
| FI91289B (fi) | 1994-02-28 |
| CA1294396C (en) | 1992-01-21 |
| FI872391A0 (fi) | 1987-05-28 |
| FI872391A (fi) | 1987-12-01 |
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Legal Events
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| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
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