DE3274887D1 - A method of polysulphide treatment in alkaline pulping of lignocellulose material - Google Patents
A method of polysulphide treatment in alkaline pulping of lignocellulose materialInfo
- Publication number
- DE3274887D1 DE3274887D1 DE8282903084T DE3274887T DE3274887D1 DE 3274887 D1 DE3274887 D1 DE 3274887D1 DE 8282903084 T DE8282903084 T DE 8282903084T DE 3274887 T DE3274887 T DE 3274887T DE 3274887 D1 DE3274887 D1 DE 3274887D1
- Authority
- DE
- Germany
- Prior art keywords
- liquor
- polysulphide
- wood chips
- wood
- chips
- 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
Links
- 229920001021 polysulfide Polymers 0.000 title abstract 7
- 238000000034 method Methods 0.000 title 1
- 238000004537 pulping Methods 0.000 title 1
- 239000002023 wood Substances 0.000 abstract 9
- 230000029087 digestion Effects 0.000 abstract 3
- 238000005470 impregnation Methods 0.000 abstract 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 abstract 2
- 229920001131 Pulp (paper) Polymers 0.000 abstract 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical class [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 238000004061 bleaching Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000002655 kraft paper Substances 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 230000008929 regeneration Effects 0.000 abstract 1
- 238000011069 regeneration method Methods 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
- D21C11/0057—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.
Applications Claiming Priority (2)
| 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 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3274887D1 true DE3274887D1 (en) | 1987-02-05 |
Family
ID=20344836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE8282903084T Expired DE3274887D1 (en) | 1981-10-21 | 1982-10-13 | A method of polysulphide treatment in alkaline pulping of lignocellulose material |
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 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 AT AT82903084T patent/ATE24556T1/en not_active IP Right Cessation
- 1982-10-13 DE DE8282903084T patent/DE3274887D1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0091457B1 (en) | 1986-12-30 |
| SE8106203L (en) | 1983-04-22 |
| ATE24556T1 (en) | 1987-01-15 |
| WO1983001469A1 (en) | 1983-04-28 |
| EP0091457A1 (en) | 1983-10-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |