SE8106203L - SET FOR POLYSULPHIDE TREATMENT OF LIGNOCELLULOSAMATERIAL FOR ALKALIC PREPARATION - Google Patents
SET FOR POLYSULPHIDE TREATMENT OF LIGNOCELLULOSAMATERIAL FOR ALKALIC PREPARATIONInfo
- Publication number
- SE8106203L SE8106203L SE8106203A SE8106203A SE8106203L SE 8106203 L SE8106203 L SE 8106203L SE 8106203 A SE8106203 A SE 8106203A SE 8106203 A SE8106203 A SE 8106203A SE 8106203 L SE8106203 L SE 8106203L
- Authority
- SE
- Sweden
- Prior art keywords
- liquor
- polysulphide
- wood chips
- wood
- chips
- Prior art date
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
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0057—Oxidation of liquors, e.g. in order to reduce the losses of sulfur compounds, followed by evaporation or combustion if the liquor in question is a black liquor
-
- 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
- D21C3/022—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes in presence of S-containing compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
Preparation of polysulphide for treatment of wood chips so that the wood consumption is reduced in kraft digestion of paper pulp. In an impregnation stage the wood chips are caused to react with black liquor, or black liquor components containing digestion liquor prepared of white liquor, while introducing oxygen of appropriate concentration in an impregnation vessel. The content of monosulphide, and to a certain extent other sulphur compounds present in the liquors, thereby forms polysulphide in contact with the wood chips which instantaneously absorb the polysulphide. Generation of polysulphide is promoted by wood reactions. Black liquor having a reduced concentration of hydroxide is withdrawn from the wood chips before delignification thereof in digestion liquor prepared of white liquor and residual impregnation liquor from the wood chips. The withdrawn black liquor is conveyed to a plant for regeneration of hydroxide in white liquor and sulphide, which wholly or partly is recovered in the form of white liquor, and which sulphide is repeatedly polysulphide-oxidized. The yield increment of pulp from the digester, as well as after the bleaching stage, is greater in oxidative polysulphide processing in presence of wood chips than in separate processing thereof in liquor before the charging into wood chips. This is interpreted such that more polysulphide is formed in the presence of chips than without.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8106203A SE8106203L (en) | 1981-10-21 | 1981-10-21 | SET FOR POLYSULPHIDE TREATMENT OF LIGNOCELLULOSAMATERIAL FOR ALKALIC PREPARATION |
PCT/SE1982/000330 WO1983001469A1 (en) | 1981-10-21 | 1982-10-13 | A method of polysulphide treatment in alkaline pulping of lignocellulose material |
DE8282903084T DE3274887D1 (en) | 1981-10-21 | 1982-10-13 | A method of polysulphide treatment in alkaline pulping of lignocellulose material |
AT82903084T ATE24556T1 (en) | 1981-10-21 | 1982-10-13 | PROCESS FOR POLYSULFIDE TREATMENT IN ALKALINE PULPING PROCESS OF LIGNOCELLULOSIC MATERIAL. |
EP82903084A EP0091457B1 (en) | 1981-10-21 | 1982-10-13 | A method of polysulphide treatment in alkaline pulping of lignocellulose material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8106203A SE8106203L (en) | 1981-10-21 | 1981-10-21 | SET FOR POLYSULPHIDE TREATMENT OF LIGNOCELLULOSAMATERIAL FOR ALKALIC PREPARATION |
Publications (1)
Publication Number | Publication Date |
---|---|
SE8106203L true SE8106203L (en) | 1983-04-22 |
Family
ID=20344836
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8106203A SE8106203L (en) | 1981-10-21 | 1981-10-21 | SET FOR POLYSULPHIDE TREATMENT OF LIGNOCELLULOSAMATERIAL FOR ALKALIC PREPARATION |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0091457B1 (en) |
AT (1) | ATE24556T1 (en) |
DE (1) | DE3274887D1 (en) |
SE (1) | SE8106203L (en) |
WO (1) | WO1983001469A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI122841B (en) * | 2004-10-04 | 2012-07-31 | Metso Paper Inc | Method and apparatus for making cellulosic pulp |
US8940129B2 (en) * | 2010-12-30 | 2015-01-27 | Uop Llc | Process for reducing one or more insoluble solids in a black liquor |
SE538792C2 (en) | 2015-02-06 | 2016-11-29 | Stora Enso Oyj | Apparatus and method for component assembly |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI40677B (en) * | 1961-05-27 | 1968-12-31 | Papirind Forskningsinst | |
NO123511C (en) * | 1966-05-14 | 1976-07-22 | Domtar Ltd | |
US3567572A (en) * | 1967-09-06 | 1971-03-02 | Pulp Paper Res Inst | Polysulfide liquor impregnation of lignocellulose materials in a multistage pulping process |
US3723242A (en) * | 1971-04-01 | 1973-03-27 | Union Camp Corp | Oxidation of sulfide pulping liquor to form polysulfide liquor in situ |
NO142408C (en) * | 1972-04-11 | 1980-08-20 | Rosenlew Ab Oy W | PROCEDURES FOR ALKALISK CELLULOS COOKING. |
CA1013903A (en) * | 1973-06-04 | 1977-07-19 | Union Camp Corporation | Method of pulping with polysulfide |
-
1981
- 1981-10-21 SE SE8106203A patent/SE8106203L/en not_active Application Discontinuation
-
1982
- 1982-10-13 AT AT82903084T patent/ATE24556T1/en not_active IP Right Cessation
- 1982-10-13 EP EP82903084A patent/EP0091457B1/en not_active Expired
- 1982-10-13 WO PCT/SE1982/000330 patent/WO1983001469A1/en active IP Right Grant
- 1982-10-13 DE DE8282903084T patent/DE3274887D1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
ATE24556T1 (en) | 1987-01-15 |
EP0091457B1 (en) | 1986-12-30 |
WO1983001469A1 (en) | 1983-04-28 |
EP0091457A1 (en) | 1983-10-19 |
DE3274887D1 (en) | 1987-02-05 |
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Legal Events
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NAV | Patent application has lapsed |
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