SE435302B - SET FOR TREATMENT OF PREPARES FROM DELIGNIFICATION OF LIGNOCELLULOSAMATER WITH CHLORIDE-CREATING BLEACH - Google Patents
SET FOR TREATMENT OF PREPARES FROM DELIGNIFICATION OF LIGNOCELLULOSAMATER WITH CHLORIDE-CREATING BLEACHInfo
- Publication number
- SE435302B SE435302B SE7412638A SE7412638A SE435302B SE 435302 B SE435302 B SE 435302B SE 7412638 A SE7412638 A SE 7412638A SE 7412638 A SE7412638 A SE 7412638A SE 435302 B SE435302 B SE 435302B
- Authority
- SE
- Sweden
- Prior art keywords
- lye
- compounds
- sulphur
- brine
- digestion
- Prior art date
Links
- 239000007844 bleaching agent Substances 0.000 title 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical class [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract 6
- 239000012267 brine Substances 0.000 abstract 5
- 230000029087 digestion Effects 0.000 abstract 5
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 abstract 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 4
- 150000001805 chlorine compounds Chemical class 0.000 abstract 4
- 230000003647 oxidation Effects 0.000 abstract 4
- 238000007254 oxidation reaction Methods 0.000 abstract 4
- 239000005864 Sulphur Substances 0.000 abstract 3
- 238000002485 combustion reaction Methods 0.000 abstract 3
- 150000001875 compounds Chemical class 0.000 abstract 3
- 238000004061 bleaching Methods 0.000 abstract 2
- 238000001704 evaporation Methods 0.000 abstract 2
- 230000008020 evaporation Effects 0.000 abstract 2
- 238000011084 recovery Methods 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract 1
- 241001313185 Colias hecla Species 0.000 abstract 1
- 239000007832 Na2SO4 Substances 0.000 abstract 1
- 241001474728 Satyrodes eurydice Species 0.000 abstract 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 239000007795 chemical reaction product Substances 0.000 abstract 1
- 239000000460 chlorine Substances 0.000 abstract 1
- 229910052801 chlorine Inorganic materials 0.000 abstract 1
- VDQVEACBQKUUSU-UHFFFAOYSA-M disodium;sulfanide Chemical compound [Na+].[Na+].[SH-] VDQVEACBQKUUSU-UHFFFAOYSA-M 0.000 abstract 1
- 239000002657 fibrous material Substances 0.000 abstract 1
- 238000009896 oxidative bleaching Methods 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 229910052938 sodium sulfate Inorganic materials 0.000 abstract 1
- 229910052979 sodium sulfide Inorganic materials 0.000 abstract 1
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 abstract 1
- 235000011152 sodium sulphate Nutrition 0.000 abstract 1
- 235000010265 sodium sulphite Nutrition 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 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
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0014—Combination of various pulping processes with one or several recovery systems (cross-recovery)
-
- 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
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
- D21C11/0028—Effluents derived from the washing or bleaching plants
-
- 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
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/02—Regeneration of pulp liquors or effluent waste waters of acid, neutral or alkaline sulfite lye
-
- 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
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/04—Regeneration of pulp liquors or effluent waste waters of alkali lye
Landscapes
- Paper (AREA)
Abstract
Lignocellulosic fibrous materials are delignified in two or more stages. An introductory stage of digestion discharges brown stock and a black liquor which contains i.a. sulphur compounds wherein sulphur has an oxidation number that equals either -II (e.g. Na2S) or IV (e.g. Na2SO3). Optionally, the brown stock is further delignified by means of oxygen, whereby oxystock and oxyliquor are obtained. Stock from digestion, i.e. brown stock or oxystock, is subjected to delignifying oxidative bleaching using chlorine or chlorine compounds, the reaction products of which subsequently form chlorides in the bleaching effluent. The non-chloride liquors, i.e. black liquor and oxyliquor, possibly also a low chloride fraction of bleaching effluents, are joined to form a lye which is recovered and combusted and includes the major part of the sulphur compounds used for digestion. The lye combustion furnace releases compounds comprising sulphur of oxidation number -II and IV. The chloride forming effluents, optionally including a minor lye fraction, are combined to form a brine which is subjected to another combustion which principally produces chlorides and compounds of sulphur of oxidation number IV(e.g. SO2) and VI (e.g. SO3 and Na2SO4). This makes it possible to eliminate sulphur compounds, e.g. sulfidic compounds with oxidation number -II, from the brine recovery operations including separation of chloride, while the digestion chemical recovery sysstem only handles the lye. By this means the digestion as well as the entire pulp mill system is relieved from chlorides, however, at least two combustion furnaces and two separate evaporation lines, one for lye and one for brine, are required. The combined water evaporation from lye and brine can be kept on the same level as for a conventional single-line black liquor operation because brine substitutes wash water.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7412638A SE435302B (en) | 1974-10-08 | 1974-10-08 | SET FOR TREATMENT OF PREPARES FROM DELIGNIFICATION OF LIGNOCELLULOSAMATER WITH CHLORIDE-CREATING BLEACH |
| CA237,121A CA1064206A (en) | 1974-10-08 | 1975-10-06 | Method of recovering substances in the extraction of spent liquors from the delignification of lignocellulosic material by means of chloride-producing bleaching agents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7412638A SE435302B (en) | 1974-10-08 | 1974-10-08 | SET FOR TREATMENT OF PREPARES FROM DELIGNIFICATION OF LIGNOCELLULOSAMATER WITH CHLORIDE-CREATING BLEACH |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE7412638L SE7412638L (en) | 1976-04-09 |
| SE435302B true SE435302B (en) | 1984-09-17 |
Family
ID=20322352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7412638A SE435302B (en) | 1974-10-08 | 1974-10-08 | SET FOR TREATMENT OF PREPARES FROM DELIGNIFICATION OF LIGNOCELLULOSAMATER WITH CHLORIDE-CREATING BLEACH |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1064206A (en) |
| SE (1) | SE435302B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5989387A (en) * | 1993-07-23 | 1999-11-23 | Tampella Power Oy | Method for controlling chloride concentration in the flue gas of a recovery boiler |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE470538C (en) | 1992-12-02 | 1996-02-26 | Kvaerner Pulping Tech | When bleaching pulp, use no chlorine-containing chemicals |
| SE501613C2 (en) * | 1993-08-03 | 1995-03-27 | Kvaerner Pulping Tech | Method of integrating bleaching and recycling in pulp production |
| SE9400016L (en) * | 1994-01-04 | 1995-07-05 | Nils Mannbro | Recycling process for bleaching of pulp |
| FI115229B (en) * | 1995-11-06 | 2005-03-31 | Kvaerner Power Oy | A method for reducing the corrosion of a pulp mill power boiler |
-
1974
- 1974-10-08 SE SE7412638A patent/SE435302B/en not_active IP Right Cessation
-
1975
- 1975-10-06 CA CA237,121A patent/CA1064206A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5989387A (en) * | 1993-07-23 | 1999-11-23 | Tampella Power Oy | Method for controlling chloride concentration in the flue gas of a recovery boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| CA1064206A (en) | 1979-10-16 |
| SE7412638L (en) | 1976-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3865685A (en) | Multiple step bleaching of cellulose with a per compound and chloride dioxide | |
| US3698995A (en) | Digestion and bleaching of wood pulp followed by recovery of chemicals and countercurrent flow of wash water | |
| US4196043A (en) | Kraft pulp bleaching and recovery process | |
| US4155806A (en) | Method for continuous alkaline delignification of lignocellulose material in two or more steps, the final of which with oxygen | |
| SE7603166L (en) | OPERATION OF BLEACHING FACILITY | |
| NO934148L (en) | Procedure for delignification of lignocellulosic material, bleaching and treatment of wastewater by means of laccases with improved efficiency | |
| SE470538C (en) | When bleaching pulp, use no chlorine-containing chemicals | |
| SE435302B (en) | SET FOR TREATMENT OF PREPARES FROM DELIGNIFICATION OF LIGNOCELLULOSAMATER WITH CHLORIDE-CREATING BLEACH | |
| SE461991B (en) | SET TO DELIGNIFY CHEMICAL MASS BY OXYGEN ALKALI TREATMENT | |
| ATE87283T1 (en) | REDUCTION OF HALOGENATED ORGANIC COMPOUNDS IN BLEACHING WASTE WATER. | |
| CA1061962A (en) | Sodium chloride removal in pulp mill systems | |
| US3453174A (en) | Pulping and bleaching process wherein effluent liquor from alkaline extraction of bleached pulp is used to dissolve smelt | |
| DE2061526C3 (en) | Process for oxygen bleaching of lignocellulose materials | |
| ES443318A1 (en) | Bleaching and digesting cellulosic pulp | |
| PT96816B (en) | PAPER PASTE BLEACHING PROCESS | |
| US4131508A (en) | Recovery system for oxygen bleaching of pulp | |
| US2364177A (en) | Manufacture of bleached kraft pulp | |
| Reeve et al. | The recovery of sodium chloride from bleached Kraft pulp mills | |
| US5030324A (en) | Sequential bleaching procedure using chlorine and chlorine dioxide in a first chlorination stage of a multistage bleaching process | |
| GB1112617A (en) | Recovery of sodium chloride in the production of bleached pulp | |
| FI67243B (en) | KOKNINGS- OCH BLEKNINGSFOERFARANDE FOER CELLULOSA | |
| FR2224589A1 (en) | ||
| US1602553A (en) | Process of producing pulp high in resistant crllulose | |
| NO950954L (en) | Method of mass bleaching | |
| SE9301940L (en) | Preparation of bleaching chemicals for cellulose pulp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |
Ref document number: 7412638-4 Effective date: 19880627 Format of ref document f/p: F |